Installation, Operation and Configuration Instructions · Installation, Operation and Configuration Instructions CONTENTS ... 42KC Set-Up and Configuration ... FULLY CCN CC6400 OR

AXiS TM

42KC, 45UC, 45XC, 35BFAccess Floor Terminal Units

Installation, Operation andConfiguration Instructions

CONTENTS

PageSAFETY CONSIDERATIONS ...................... 1GENERAL ...................................... 2-5System Overview ................................ 2System Architecture ............................. 3PRE-INSTALLATION .............................. 6Unpack and Inspect Units ........................ 6Storage and Handling ............................ 6Prepare Jobsite for Unit Installation .............. 645XC FAN-POWERED ZONE MIXING UNIT

INSTALLATION .............................. 6-2745XC Hardware ................................... 745XC Field-Supplied Hardware ................... 745XC Fan-Powered Zone Mixing Box

Installation ..................................... 945XC Sensor Installation ........................ 1445XC Input and Output Connectors ............. 25Connect to the CCN Communication Bus ....... 26Connect Air Pressure Tubing .................... 2645UC UNDERFLOOR SERIES FAN-POWERED

TERMINAL INSTALLATION ................. 27-3545UC Hardware .................................. 2745UC Field-Supplied Hardware .................. 2745UC Underfloor Series Fan-Powered Unit

Installation .................................... 2945UC Sensor Installation ........................ 30Connect to the CCN Communication Bus ....... 30Modulating Baseboard Hydronic Heating ........ 3542KC PERIMETER FAN COIL UNIT

INSTALLATION ............................. 36-4542KC Hardware .................................. 3642KC Field-Supplied Hardware .................. 3742KC Perimeter Fan Coil Unit Installation ....... 37Connect the Power Transformer ................. 38Fan Coil Controller Inputs and Outputs ......... 4442KC Sensor Installation ........................ 4435BF DIFFUSER INSTALLATION .............. 46-4935BF-R Swirl Diffuser Installation ............... 4635BF-CT, D,V Linear Diffuser Installation ......... 46OPERATION .................................. 50,51Initial Start-Up Procedures ...................... 5045XC Start-Up and Checkout Procedure ......... 5042KC Start-Up ................................... 50

PageCONFIGURATION ............................ 51-6845xc Commissioning ........................... 5145XC Set-Up and Configuration ................. 5142KC Set-Up and Configuration ................. 5742KC Fan Coil Airflow Adjustment .............. 57Setting Fan Airflow with ECM ................... 57Balancing Underfloor Fan Terminals ............ 57Speed Controller ................................ 6OSet Points ....................................... 6OTesting and Start-Up ............................ 6145XC Operation ................................. 6242KC Fan Coil Sequence ........................ 6645XC Application Considerations ............... 66Maintenance ................................... 67

SAFETY CONSIDERATIONS

SAFETY NOTE

Air-handling equipment will provide safe and reliableservice when operated within design specifications. Theequipment should be operated and serviced only byauthorized personnel who have a thorough knowledgeof system operation, safety devices and emergencyprocedures.

Good judgement should be used in applying any manu-facturer's instructions to avoid injury to pel.sonnel or&tmage to equipment and propel_y.

Disconnect all power to the unit before performing mainte-nance or service. Unit may automatically start if power isnot disconnected. Electrical shock and personal injurycould result.

If it is necesstu-y to remove and dispose of mercury contac-tors in electric heat section, follow all loc_d, state, and fed-eral laws reg_uding disposal of equipment containinghazardous materi_d s.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53450001-01 Printed in U.S.A, Form 45-4SI Pg 1 11-05 Replaces: 45-2SI

GENERAL

The 45XC fan-powered mixing box provides plenum pres-sure and temperature control to the undedloor plenum. The45XC mixing box is also equipped with a modulating prima Uair damper and a variable speed fan. Together. these featuresallow the 45XC unit to maintain plenum pressure at the desiredpressure set point while adjusting the plenum temperature tomatch the load requilements.

The 45UC series underfloor fan-poweled terminal and the42KC fan coil unit are used to provide increased cooling orsupplemental heating to perimeter zones. These units are avail-able with factou-installed electric or hot water heating coils.

The controllers are factou-mountedi The 33ZCPLNCTLzone controller is supplied on the 45XC fan-powered mixingbox. The 33ZCFANTRM underfloor controller is supplied onthe 45UC underfloor fan-powered terminal. The 42KC fan coilunits contain the 33ZCFANCOL perimeter fan coil controllel:All tue designed to be an integral part of the Carrier Direct Dig-ital Controls (DDC) system. The controllers can communicateon the Carrier Comfort Network® (CCN) system while com-pletely integrating with the building's heating, ventilation andair conditioning (HVAC) system.

System Overview -- Electronic control units feature afactory-installed enclosure that provides easy access for fieldconnections.

The 45XC zone controller is factory-supplied and factory-configured, and consists of a processol, pressure transducer andactuatol: The controllers are configured to maintain the plenum

pressure between 0.01 and 1.0 in. wg and to control and main-tain space temperature by measuring both plenum and spacetempel_tture. The space temperature set point may be adjustedby the user through the space temperature sensor without addi-tional software.

Each 45XC zone controller also has the ability to functionas a linkage coordinator for systems with up to 128 zones. As alinkage coordinatol, a controller retrieves and provides systeminformation to the air-handling equipment and other zonecontrollers. When a primtu-y supply air sensor is installed, thecontroller can function as a stand-alone device. See Fig. 1and 2.

The controller monitors differential pressure from two pres-sure probes: one mounted in the space and one in the pressur-ized plenum. It compares file resulting signal to a plenumpressure set point in order to provide pressure-independentcontrol of the air passing through the mixing box into theplenum.

The controller is wired to a w_dl-mounted, field-supplied,space temperature sensor (SPT) in order to monitor zonetemperature changes and satisfy zone demand.

The controller is designed to allow a service person orbuilding owner to configure and operate the unit through theCCN user interface, however, a user interface is not requiredfor day-to-day operation. All maintenance, configuration, set-up, and diagnostic information is available through the Level IIcommunications port to _dlow data access by an attached com-puter running Network Service Tool, ComfortVIEW TM, orComfortWORKS® sollware.

PRIMARY

PRIMARY AIR i RTEMPERATURE

SENSOR _

AIRFLOW _ m

SENSOR_.

PRIMARY AIR _[ '_

DAMPER

DAMPER _ACTUATOR

FAN MOTOR

I ..'i I--HIGHPORT •

UNDERFLOOR ZONE CONTROLLER m

(3 3ZCPLNCTL) LOW •I • CONTROLSPORT

r_ • • ENCLOSURE

I

*.... g • •

TEMPEI::_STPA_ITI =SENSOR _ SPACE

PRESSURE mSENSOR

UNDERFLOORPLENUM

PRIMARYAIR DUCT

/ RETURN FIELD-SUPPLIED

PLENUM AIR FILTER MONITOR

PRESSURE IISWITCH

(fieH-suppUed) Ii

_- -T,,T,,l)........

MIXED AIR_ PLENUM PRESSURE SENSOR

-----RETURNDUCT

3 equivalent diameters

/stra _(_idn[s_ha_ge duct

•_" m SUPPLYAIRTEMPERATURE

Fig. 1 -- Typical Installation of Single 45X0 Fan-Powered Mixing Unitfor Each Underfloor Zone

PRIMARY AIRTEMPERATURE

AIRFLOW

PRIMARYAIR DUCT

/ RETURN FIELD-SUPPLIEDPLENUM AIR FILTER MONITOR

PRESSURE II: (f _1_ _upplj_) : SWITCH I

(field-supplied) t

PRIMARY AIRDAMPER

FAN MOTORINTERFACE

lUNDERFLOORZOBECONTROLLER

(33ZCPLNCTL)

SPACETEMPERATURE

SENSOR

ACTUATOR

HIGHPORT

LOWPORT CONTROLS

ENCLOSURE

FIELD-INSTALLED VELOCITY PROBE

(Airflow Sensor)

(used in applicalions with more than one

45XC unit presstlrizing a common plenum)

UNDERFLOOR SUPPLY AIRPLENUM TEN PERATURE

DUCT

3 equivalent diameterse duct

(minimum)

Fig. 2 -- Typical Installation for Multiple 45X0 Fan-Powered Mixing Unitsin a Larger Common Underfloor Zone (One 45XC Unit Shown)

System Architecture--Figure 3 shows the typicalcontrol system architectme: a 45XC mixing box unit used toprovide the mtdn plenum plessure and temperature control andfour 42KC fan coil units to provide supplemental heating andcooling.

Figure 4 shows an tmangement of underfloor and zonecontrollers and temfinal units employed in the HVAC systemof a large building. Though all controllers are connected to thesame bus, controllers am configured to stand alone, satisfyingthe needs of individu_fl zones. These tue commonly used inperimeter zones. All underfloor controllers participate in link-age, with one configured as a linkage master; the rest areconfigured as slaves.

This arrangement, from the software point of view, givesthe following information:

• All controllers may be configured to stand _flone with flleirown sensor OR they may shtu'e a temperature sensorbetween themselves. The zone controllers do not sharesensor data wifll underfloor controllers.

• Controllers may have their own temperature sensor (locatednear ceiling plenum) OR may share a single temperaturesensoE

• Controllers p_uticipate in linkage when sending the damperposition, occupancy, zone temperature and temperature setpoint &lta to the master underfloor controllel:

A bridge is lecommended to isolate the underfloor controlsystem from the primary communication (comm) bus to:

• improve communication quality• increase communication speed

Controllers use the underfloor plenum as the air source andcontrol the diffusels to satisfy the space temperature needs.Controllel_ also make use of strip heaters for auxiliary heating.

POWER REQUIREMENTS -- The power supply is 24 vac_+10% at 40 va (50/60 Hz).

WIRING CONNECTIONS--Field wiring is 18-gage to22-gage wire. The zone controller is a NEC (Natiomd Electric_dCode) Class 2 rated device.

INPUTS

• space temperatme sensor• primary air &mper position• plenum sensor (factory-installed)• supply air temperature sensor• optiomd primary air temperature sensor (required for sys-

tems which do not utilize a linkage compatible air source)• optional CO 2 sensor• optiomd relative humidity sensor

OUTPUTS

• internally factory-wired VAV (vtuiable air volume) actuator• internally factory-wired fan speed controller

ACCURACY -- Terminal tdrflow pressure control is rated to

1 in. wg measured maximum pressure. Tile zone controller iscapable of controlling from as low as 0.01 in. wg to as high as

1.0 in. wg nominal pressure with an accuracy of _+3% (nomi-

mfl) at any point within the range.

HARDWARE (MEMORY) -- The hmdware consists of

FLASH EPROM memory.

DIFFERENTIAL PRESSURE SENSOR --Pressure range is

0.0 to 2.0 in. wg maximum for the onboard pressure sensol:

SPECIFIED SENSING TEMPERATURE RANGE -- The

controller space temperature measuring range is -40 to 245 EThis range applies to space temperature, supply-air tempera-

turn and pfimtu'y air temperature sensors. The controller has an

allowable control set point range from 40 to 90 F for heatingand 45 to 99 F for cooling.

COMMUNICATIONS -- The maximum number of control-

lets is limited to 128 zones, with a limit of 8 systems (Linkage

Coordinator configured for at least 2 zones). Canier Comfort

Network® (CCN) bus length may not exceed 4000 ft, with no

morn titan 60 devices on tiny 1000 ft section. Optically isolatedRS-485 repeaters am required every 1000 ft.

At 19,200 and 38,400 baud, the number of controllel_ islimited to 128 maximum, with no limit on the number of Link-age Coordinators. Bus length may not exceed 1000 ft.

ENVIRONMENTAL RATINGS -- Operating Temperatureis 32 to 140 F fit 0 to 90% rh (relative humidity)(non-condensing).

Shipping Temperature is _4-0 to 185 F fit 0 to 90% rh(non-condensing).

PERFORMANCE VIBRATION

• 0.014 in. peak-to-peak displacement measured fit 5 to 31 Hz• 0.75 G measured fit 31 to 300 Hz

CORROSION -- Equipment intended for indoor use only.

APPROVALS

• listed under UL 873

• conforms to requirements per European Consortiumstandards EN50081-1 (CISPR 22, Class B) and EN50082-1(IEC 801-2, IEC 801-3, and IEC 801-4) for CE mm'klabeling

• UL94-5V plenum rated (housing and actuator)

®

®[] ®

® "'"---1"

®

_- _ _ _l _

®

Exterior Wall ''/'' I

LEGEND

Exterior Zones

®lx ] ® ®"-1-

I

®.. ®

-1£2J

®

I_____

® I]11

®

35BF-R

Interior Zones

42KC -- Perimeter Fan Coil Unit with 33ZCFANCOL Fan Coil Controller45XC -- Fan-Powered Zone Mixing Unit with 33ZCPLNCTL Zone ControllerT -- Wall-Mounted Temperature Sensor

35BF-D Linear Diffuser

®

35BF-R Swirl Diffuser

Fig. 3 -- Typical System Layout (45XC and 42KC)

CCN PRIMARY BUS (BUS 0)-_

_j

CCNSYSTEM

MONITORINGSOFTWARE

FULLY CCN CC6400 OR CSAMCOMPATIBLE CARRIER EQUIPPED

AIR HANDLER NON-CARRIERAIR HANDLER

SECONDARY BUS (1 OF UP TO 128)ADDRESSED

SEQUENTIALLY

45UC UNIT(33ZCFANTRM) li

//I tl._4_xcUN,T 33ZOPLNOTL

FAN COILCONTROLLER

T_'CAoy_,_tz II

BRIDGE _ lJ

(RECO_

(33ZCFANCOL)

TYPICAL 42KCFAN COIL UNIT

DATACOLLECTION

OPTION

42KC UNIT(33ZCFANCOL)

TO OTHERCONTROLLERS/" ON COMM BUS

II

II

II

II

II

LEGEND

CCN -- Carrier Comfort Network®CSAM -- Comfort System AiRvlanager TM

Fig. 4 -- Control System Architecture with Underfloor Terminal Units

PRE-INSTALLATION

Unpack and Inspect Units -- Remove shipping wlapsfrom ;ill units. Check file shipment against shipping ordel:Inspect for dalnage upon receipt. //shil?ment is damaged orincomplew, .file claim with transl)ortation company and advi_eCarrier immediaw@

Storage and Handling- Store in a clean, dry andcovered location. Do not stack units. When unpacking units,ctue should be taken flint the inlet collars and externally mount-ed components do not become &imaged. Do not lift units usingcollars, sensol_, or externally mounted components as handles.If a unit is supplied with electric or hot water heat, care shouldbe taken to prevent damage to these devices. Do not lay uncrat-ed units on end or sides. Do not stack uncrated units over 6 ft

high. Do not handle control boxes by tubing connections orofl_er external attachments.

Prepare Jobsite for Unit Installation -- To savetimeand to reduce the possibility of costly errol_, set up a completesmnple inst_dlation in a typical room at the jobsite. Check allcritic_d dimensions. Refer to job di'awings and product dimen-sion drawings as required.

45XC FAN-POWERED ZONE MIXING UNITINSTALLATION

Physical components of the 45XC fan-powered zonemixing unit is detailed in Fig. 5. Figure 6 shows 45XC fan-powered zone mixing unit dimensions and weight data.

PRIMARYAIR DUCT

CEILING PLENUMRETURN AIRDUCT

ENCLOSURE

t42 in. MINIMUM - SIZE 04

54 in. MINIMUM - SIZE 07

RAISED FLOOR

LOW AND HIGHPRESSURE PORT* SUPPLY AIR

TEMPERATUREPROBE

*Installation is shown for a single unit in a multiple unit/common plenum application,High and low pressure ports piped to a discharge plenum. Refer to Fig, 2.

Fig. 5 -- 45XC Fan-Powered Zone Mixing Unit Physical Details

,I

V-D

L_

_H_

?,H

_B_

tY

2[ PRIMARYAIR INLET [_

1A

Lk

-- 1-1/4"

_1-1/2"

1/2" DIA.

BCPER 1

RECIRCULATEB

AIR INLET [_

"_ J_

ALLOW AT LEAST24" CLEARANCEFOR CONTROLS

[ 6!/4,,, t

_k

I x..I" ....... I

I I

I I r_ DISCHARGEI IL "T_ "_ I-- --_--_ --,

I.I

f_----MOUNTING BRACKET - (4 PLCS) =SEE OPTIONAL FEATURES BELOW -

L

lG

Z

1

2 9/16"

INLETVIEW PLAN VIEW - LEFT HAND UNITRIGHT HAND UNITS AVAILABLE - CONTROLS NOT SHOWN

DISCHARGE VIEW

45XC UNIT SIZE UNIT WEIGHT (Ib) l FILTER SIZE (in.) FILTER PIN I FILTER KIT PIN

4 209 17 x 17 x 1 102649-1717 I 35033417177 269 22 x 19 x 1 102649-2219 3503342219

UNITSIZE

INLET PRI. FAN MAX DIMENSIONS (in.)SIZE HP Recirc, Air Discharge(in,) CFM CFM* FLOW L W H A B D F G X Y Z J

6 500 1200 1700 1/2 361/8 361/8 181/16 151/8 15 57/8 11 14 9 6 31/8 31/88 900 1200 2100 1/2 361/8 361/8 181/16 151/8 15 77/8 11 14 9 6 31/8 31/8

10 1400 1200 2600 1/2 361/8 361/8 181/16 151/8 15 97/8 11 14 9 7 31/8 31/812 210O 1200 3300 1/2 361/8 361/8 181/16 151/8 15 117/8 11 14 9 8 31/8 31/8

10 1400 2500 3900 1 421/8 461/8 201/16 201/8 17 97/8 15 17 10 7 51/2 41/812 2100 2500 4600 1 421/8 461/8 201/16 201/8 17 117/8 15 17 10 8 51/2 41/814 2800 2500 5300 1 421/8 461/8 201/16 201/8 17 137/8 15 17 10 10 51/2 41/816 3700 2500 6200 1 421/8 461/8 201/16 201/8 17 157/8 15 17 10 101/4 51/2 41/8

*Estimated for rpm/torque controlled motor, at 0.1 in, wg static pressure under floor.

NOTE: Inlet Size: 6-10, DD = 37/8 in. Inlet Size: 12-16, DD = 57/8 in,

Fig. 6 -- 45X0 Fan Powered Zone Mixing Unit Physical Data and Dimensions

45X0 Hardware -- The 45XC fan-powered mixing unitcontains the 33ZCPLNCTL zone controlle]:

Figure 7 shows the zone controller physical details,

45X0 Field-Supplied Hardware -- Each 45XC fan-powered zone mixing unit requires the following field-suppliedcomponents to complete its installation:

• transformer-- 24 vac, 40 va (stan&ud applications)• contactors (as required for electric heat)• V4-in. OD flame retar&mt polyethylene tubing (length not

to exceed 25 ft)• space temperature sensor (33ZCT55SPT. 33ZCT56SPT. or

33ZCT57SPT)• supply-air temperature sensor (33ZCSENSAT) with two

no. 10 x l/2-in, sheet meted screws (to secure SAT sensor tosupply duct)

• primary-air temperature sensor• indoor-air quality (CO2) sensor (optional)• relative humidity sensor (optional)

SPACE TEMPERATURE SENSOR (Fig. 8) -- Each33ZCPLNCTL zone controller requires a field-suppliedCarrier space temperature sensor There are three sensorsavailable for this application:

• 33ZCT55SPT. space temperature sensor with ovemdebutton

• 33ZCT56SPT. space temperature sensor with ovenidebutton and set point adjustment

• 33ZCT57SPT. space temperature sensor with override but-ton, set point adjustment, and manual fan speed control

SUPPLY-AIR TEMPERATURE (SAT) SENSOR (Fig. 9) --The zone controller must be connected to a field-supplied sup-ply air temperature (SAT) sensor (P/N 33ZCSENSAT) to mon-itor the temperature of the air delivered by the fan coil.

PRIMARY-AIR TEMPERATURE SENSOR (PAT)(Optional) --A field-supplied, primtuy air temperature (PAT)sensor (P/N 33ZCSENPAT) is used on a zone controller that isfunctioning as a linkage master for a non CCN/linkage compat-ible air source. See Fig. 10.

INDOOR-AIR QUALITY (CO2) SENSOR (Fig. 11 ) -- Anindoor air quality sensor is required for [AQ monitoring.Three different CO, sensors are available for zone CO 2 levelmonitoring.

• The 33ZCSENCO2 sensor is an indool: wall-mounted sen-sor with an LED (light-emitting diode) display.

• The 33ZCT55CO2 sensor is an indoor, wall-mounted sen-sor without display. The CO, sensor also includes a spacetemperature sensor with override button.

• The 33ZCT56CO2 sensor is an indoor, wall-mounted sen-sor without display. The CO, sensor also includes a spacetemperature sensor with override button and temperatureoffset.

RELATIVE HUMIDITY SENSOR (Fig. 12) -- The relativehumidity sensor (P/N 33AMSENRHS000) is an indool: wall-mounted sensor and is required for zone humidity control(dehumidification).

35 in Ib (4 Nm)80 110s

÷24V

RH/IAQ SPT

............... GND_o FAN AC GND

,_ ........... FA N SECFLOW_, _ +IOV SAT

24VAC T56b.

, _ N/A DMPPOS GNDHEAT3 GND

¢o ....... PATTEST

REMOTEGND

J6

O00I_I

Fig. 7 -- 45X0 Fan-Powered Zone Mixing Unit Controller Physical Details (33ZCPLNTCTL)

J L

L_ coo,g w°,_Fig. 8 -- Space Temperature Sensor (PIN 33ZCT56SPT Shown)

.08

.39

.175 DIA

x .600

FOAM GASKET

114"±6

NOTE: Dimensions are in inches.

Fig. 9 -- Supply Air Temperature Sensor (33ZCSENSAT)

Fig.10-- Primary Air Temperature Sensor(33ZCSENPAT)

m__UUUUUU_

ooooooc

ooooooc

oooooc

oooooc

oooo

3.25

(8.3)

[(12.7)

C

NOTE: Dimensions are in inches. Dimensions in () are incentimeters.

Fig. 11 -- Indoor Air Quality (CO2) Sensor(33ZCSENCO2)

O

Fig. 12- Wall-Mounted Relative Humidity Sensor(33AMSENRHS000)

45XC Fan-Powered Zone Mixing Box InstallationSTEP l -- SELECT LOCATION

1. Units should be inst_dled so that they do not come in con-tact with obstacles such as rigid conduit, sprinkler piping,Greenfield flexible meted covering, or rigid pneumatictubing; such contact can transmit vibration to the buildingstructure, causing objectionable low fiequency noise.

2. Units should never be installed tightly against concreteslabs or columns, as vibration transmission is amplified inthis condition.

3. Fan-powered termin_ds require sufficient cletu'ance forservicing the blowerhnotor assembly from the bottom ofthe unit, low voltage controls from the side and linevoltage motor controls or electric heat (if equipped) fromthe rear (discharge end) of the unit. See Fig. 6.

Bottom access panel removal requires a minimum of3-in. minimum clearance, in addition to substantial hori-zont_d clearance, to slide the access panel out of the wayfor service. Actual horizont_d dimensions will vary due tovarying access panels for different sized units. See unitsubmitted drawings for detailed information.

NOTE: Be cellain that accommodations for panel remov-ed of unit casings me large enough to _dlow adequateinternal service room once the panels tu'e removed.A clemance of 18 in. is recommended for control enclo-sure access. Unit control enclosure will vary dependingon which control package is used. Control enclosurelocation is specified on unit submittals. Low voltageenclosure covers _ue removable, not hinged.A clearance of 36 in. is recommended for line voltagemotor controls and electric heat control access. High volt-age motor controls or electric heat control access issupplied with hinged access doors for units with fuseddisconnect. Specific location is indicated on the unitsubmitted.

These recommendations do not supersede NEC (NationalElectrical Code) or local codes that may be applicable.Adherence to these codes me the responsibility of theinstalling contmctoc

4. Whenever possible, fan-powered boxes should beinstalled over halls or passageways (rather than overoccupied spaces) in order to limit the sound reachingoccupants.

STEP 2 -- POSITION UNIT

1. When moving boxes, use appropriate material handlingequipment and avoid contact with shaft extensions, con-trois, wiring, piping, heaters, and control boxes.

2. Raise unit to position using safe mechanical equipmentand support until hanging means are attached and box islevel.

STEP 3 -- INSTALL UNIT

1. Inst_dl field-supplied eyebolts, straphangers or bolt rodsupports as desired. Figure 13 illustrates possible 45XCunit suspension methods. A typical underfloor installationis shown in Fig. 14.

2. Care should be taken to use hanging materials of suffi-cient stiffness and strength, rigidly attached to the unit.Straps should not be located on coil flanges, electric heatsections, or control boxes. When using trapeze supports,avoid areas where access is required to side mountedcontrols, or side or bottom access doors. For best installa-tion with trapeze supports, provide elastomeric materialbetween unit and supports.

3. Hangel.s should be securely attached to bar joist ormounting anchors properly secured to building structurewith lugs or poured-in-place hangers. Percussion nails arenot considered adequate anchol.s.

STEP4-- MAKEDUCTCONNECTIONS1. Checkthatfilepressurepick-upinprimal"/aircollaris

locatedproperlyandthatairsupplyductconnectionstueairtight.[nst_dlsupplyductworkonunit inletcollal:following_dlacceptedmedium-pressureductinstallationprocedures.Se_djointsagainstleakage.NOTE:Formaximumefficiencyincontrollingradiatednoiseincriticalapplications,inletductsshouldbefabri-catedof 24-gageminimumsheetmetalinplaceof flexconnections.Flexductisextremelytransparenttoradiat-edsound;consequentlyhighinletstaticpressure(Ps)orsharpbendswithexcessivepressuredropcancauseara-diatednoiseprobleminthespace.If flexductisused,itshouldbelimitedtotheconnectionbetweenthedistribu-tionductandthebootdiffusel:

2. Installthedischargeduct,beingcarefulnottoreducethefaceareaofanyelectricheatsectionuntilseveraldimne-tersawayfromtheunit.It isstronglyrecommendedthatlineddischargeductbeuseddownstremnof theunit.Insulateductasrequired.

3. Fanboxesshouldnotbealtachedto octopussectionsimmediatelydownstreamoftheunit.

4. Installoptionalleturn-airfiltersbeforeoperatingtheunit.5. Leaveconstructionfilterssuppliedwiththeboxinplace

untilinstallationiscompleteandbuildingiscleguedforoccupancy.

HANGER

STEP 5 -- POWER WIRING

Disconnect electrical power before wiring or servicing theunit. All disconnect switches on the temrinal (if equipped)should be in the OFF position while making power connec-tions. Electrical shock, personal injury, or &_mage to thezone controller can result.

1. All power wiring must comply with local codes and withNEC ANSI/NFPA (American National SttmdiudsInstitute/National Fire Protection Association) 70-1981.Disconnect switches are optional equipment. Electric'M,control and piping diagrams are shown on the exteriorlabeling or on a diagram inside the control and high-voltage enclosure covers, unless otherwise specified inthe order write-up. All units are wired for a single pointelectrical connection to the fan and electric heater (ifequipped). Electric heaters provided by Carrier arebalanced by kW per stage. The installing electricianshould rotate incoming electric service by phase to helpbalance overall building load.

2. All field wiring must be provided with a safety discon-nect per NEC 424-19, 20, and 21.

3. Units with electric heat should use copper wires rated atleast 125% of rating plate amperage. Refer to the unit'srating label and minimum supply circuit mnps.

4. Observe wiring diagram and instructions attached to theunit. A Wye power source with a fourth (neutral) wire inaddition to the full sized ground wire is required for480-v. 3-phase units. All units must be grounded asrequired by NEC 424-14 and 250. See Fig. 15A and 15B.

ROD

DO NOTSUSPEND UNIT BYTRAPEZE HANGERS THATINTERFERE WITH THEUNITACCESS PANEL

Fig. 13 -- Typical 45X0 Support Methods

10

ROOMSENSOR

45XCFAN POWERED

MIXINGBOX

SWIRL DIFFUSER

Fig. 14 -- Typical Underfloor Installation -- 45XC Fan-Powered Mixing Box

1!

INLET SENSOR

LEGEND

AFS -- Airflow SwitchCOM -- CommonCOW -- CounterclockwiseCW -- ClockwiseDMPPOS -- Damper PositionECM -- Electronically Commutated MotorGND -- GroundN.O. -- Normally OpenPAT -- Primary Air Temperature SensorSAT -- Plenum Temperature SensorSPT -- Space Temperature SensorUL -- Underwriter's Laboratories

Factory PipingFactory WiringField Wiring

LLO POR'f

"tO BE

CAPP_

NOTES:1. Verify actuator bushing is in the full CW position. Rotate damper CW NEU_t¢

to the fully closed position. Mount actuator over damper shaft andsecure to shaft enclosure. Engage clutch and rotate dam )er CCW tothe fully open position.

2. Use insulated quick connects.

Electric shock may result. Disconnect unit prior to servicing unit.

/J4

BLU ._IB

3, These controls have been wired to comply with UL-1995,

Fig. 15A -- 45XC Zone Controller Wiring -- Control Package 4840

'..,J

lAIR FLOW>

]

0 0 0 0 0

COIL &:WlRE TIEOF PNEUMATIC

TUBING IN CONTROL BOX

- GREEN/BLAC_

LRED/BLACK 11

INLET SENSOR

_,L GREEN/BLK (HI) F_

CH RED/BLK (HI)

(" INC >TO ECM BOARD_INTERFACE K_ DEC >

( 24 VAC_

24 VAC TRANSFORMER -,/

50VA MIN

HIGH VOLTAGE>

CONTROL BOX

DISCHARGE SENSOR ASSEMBLY

f45XC SIZE 4 - 35134804 (USES 14" INLET AIRFLOW PROBE)

/4.5XC SIZE 7 - 35134807 (USES 16" INLET AIRFLOW PROBE)FIELD NOTE:

"_ NMOULNE_I_ICHNARGEFESEENSFRORoMIN E_tlSCoH_RuGNETDUCTWORK

MOUNT WITH HOLES OF RED TUBE FACING AIRFLOW,

f- c_Z._o_tCT._/AC_ATOR_2_v

,,el

+,o,o_,,,!_%ow SA_DMPPOS O _, _l t ORANGE T56 ' I

-I PA_ I

| ."1,. "_L #18

'°'1,I' 1, '*' '1"-,______I _I la GREEN#18

RED #18

WHT #18

ORANGE #18

COM

N.O. _

"(EL #18

BLU #18

®

SPACE TEMPERATURE "1SENSOR !

E%LSU_%'E_DL_ J

PLENUM TEMPERATURE I

SENSOR I(FACTORY SUPPLIED)

PRIMARY AIR "I

TEMPERATURE SENSOR II

(FIELD SUPPLIED) j

LEGENDAFS -- Airflow SwitchCOM -- CommonCCW -- CounterclockwiseCW -- Clockwise

( _ DMPPOS -- Damper Position

Y ECM Electronically Commutated MotorGND -- GroundN.O. -- Normally OpenPAT -- Primary Air Temperature Sensor

_ SAT -- Plenum Temperature SensorSPT -- Space Temperature SensorUL -- Underwriter's Laboratories

Factory PipingFactory WiringField Wiring

NOTES:1. Verify actuator bushing is in the full CW position. Rotate damper

CW to the fully closed position. Mount actuator over dampershaft and secure to shaft enclosure. Engage clutch and rotatedamper CCW to the fully open position.

2. Use insulated quick connects.

Electric shock may result. Disconnect unit prior to servicingunit.

3. These controls have been wired to comply with UL-1995.

Fig. 15B -- 45XC Zone Controller Wiring -- Control Package 4841

45XC Sensor Installation

GENERAL SENSOR INSTALLATION --The sensor shouldbe mounted:

• on tin internal wall near a return air grille or duct• tit least 3 ft from any corner, 2 ft from tin open doorway and

4 to 6 ft from the floor

• proximal to the wiling egress on file wall• where temperature operating limits ale 32 to 122 F

The sensor should NOT be mounted:

• close to a window, on an outside wall, or next to a doorleading to the outside

• close to or in direct airflow of areas such as open windows,&'affs or over heat sources

• in meas with poor air circulation, such as behind a door or intin alcove where there are dramatic temperature fluctuationsor moistme accumulation

• where it is influenced by supply air as the sensor will givetin inaccurate leading

• where it may be exposed to direct occupant breathing, suchas near water coolers or coffee machines.

SPACE TEMPERATURE SENSOR INSTALLATION --A space temperature sensor must be installed for each zonecontrollec There are three types of SPT sensors available usedwith the 33ZCPLNCTL controller: 33ZCT55SH' space tem-perature sensor with timed override button, 33ZCT56SPTspace temperature sensor with timed override button and setpoint adjustment, and 33ZCT57SPT space temperature sensorwith timed override button, set point adjustment, and manualfan speed control. See Fig. 8 and 16.

The space temperature sensor is used to measme the build-ing interior temperature and should be located on an interiorbuilding wall. The sensor wall plate accommodates the NEMA(National Electrical Manufacturers Association) standmd 2 x4 in. junction box. The sensor can be mounted directly on thewall surface if acceptable by local codes.

Do not mount the sensor in drafty locations such as near airconditioning or heating ducts, over heat sources such as base-board heaters or radiators, or directly above wall-mountedlighting dimmers. Do not mount the sensor near a windowwhich may be opened, near a wall corner, or a dool: Sensol.smounted in these meas will have inaccurate and erratic sensorreadings.

The sensor should be mounted approximately 5 ft from thefloor, in tin area representing the average temperature in thespace. Allow fit least 4 1l between the sensor and any cornerand mount the sensor fit least 2 ft fiom an open doorway.

The sensor consists of the following hardware:

1 -- sensor top1 -- sensor base

1 -- mounting plate2 -- machine screws (6 x 32)

2 -- locking screws

Before performing service or maintenance operations onthe system, turn off main power switches to the unit.Electric shock can cause personal injury.

Install the sensor as follows (see Fig. 16):

1. Locate the two Allen type screws fit file bottom of thesensoE

2. Turn file two screws clockwise to release the cover from

the sensor wall mounting plate.3. Lift the cover from the bottom and then release it from

the top fasteners.

4. Feed the wires from the electrical box through the open-ing in the center of the sensor mounting plate.

5. Using two no. 6-32 x 1 machine screws (provided withthe sensor), secure the sensor to the electrical box.

NOTE: Sensor may also be mounted directly on the wallusing 2 plastic anchors and 2 sheet metal screws(field-supplied).

6. Use 20-gage wire to connect the sensor to the controllel:The wire is suitable for distances of up to 500 ft. Use athree-conductor shielded cable for the sensor and setpoint adjustment connections. The stan&_rd CCN com-munication cable may be used. If the set point adjustment(slidebm) is not required, then an unshielded, 18-gage or20-gage, two-conductor, twisted pair cable may be used.

The CCN service jack requires a septuate, shielded CCNcommunication cable. Always use separate cablesfor CCN communication trod sensor wiring. (Refer toFig. 17-19 for wire terminations.)

7. Replace the cover by inserting the cover at the top of themounting pkite first, then swing the cover down over thelower portion. Rotate the two Allen head screws counter-clockwise until the cover is secured to the mounting pkiteand locked in position.

NOTE: Clean sensor with damp cloth only. Do not usesolvents. See Table 1 for resistance vs temperature data.

4.50 3.28

CLEARANCE HOLES FOR(2) #8 MOUNTINGSCREWS ON CENTERLINE

,

NOTE: Dimensions are in inches.

Fig. 16 -- Space Temperature Sensor andWall-Mounted Humidity Sensor Mounting

14

Wiring the Space Temperature Sensor (33ZCT55SPT,33ZCT56SPT, 33ZCT57SPT) -- The sensor wiring has thefollowing requirements:

• Power requirements: 18 to 36 vac RMS 50/60 Hz at 4 va.• All system wiring must be in compliance with _dl applicable

local and national codes.

• A dedicated power supply is required for this sensoE• All sensor wiring should be color-coded for ease of mainte-

nance and service.

• Wiling should be 18 to 22 AWG (American Wire Gage)stranded wire (20 AWG is recommended).

To wire the sensor, perform the following (see Fig. 17-19):

1. [dentify which cable is for the sensor wMng.2. Strip back the jacket from the cables at least 3 inches.

Strip I/4-in. of insulation from each conductoc Cut theshield and drain wire from the sensor end of the cable.

3. Connect the sensor cable as follows:

a. Connect one wire from the cable (RED) to the SPTterminal on the controller. Connect the other end ofthe wire to the left terminal on the SEN terminalblock of the sensor.

b. Connect another wire from the cable (BLACK) tothe GND terminal on the controller. Connect theother end of the wire to the remaining open termi-nal on the SEN terminal block (COM on33ZCT57SPT).

c. On 33ZCT56SPT and 33ZCT57SPT thermostats,connect the remaining wire (WHITE/CLR) to theT56 terminal on the controllec Connect the otherend of the wire to the SET terminal on the sensor.

d. [n the control box, install a no. 10 ring-type crimplug on the shield drain wire. Install this lug underthe mounting screw of the zone controller.

e. On 33ZCT56SPT thermostats, install a jumperbetween the two center terminals (right SEN andleft SET). See Fig. 18.

f. On 33ZCT57SPT thermostats, a separate3-conductol; shielded cable is used to connect thefan speed wiring. Connect the SPD terminal on thethermostat to the SPEED terminal on the zone con-trollec Use the white/clear wire. Connect the COMterminal on the thermostat to the GND terminal onthe zone controller. Use the black wire. Connectthe 10V terminal on the thermostat to the +IOVterminal on the zone controllec Use the red wire.

In the control box, install a no. 10 ring-type crimplug on the fan speed wiring shield drain wire.Install this lug under the mounting screw of thezone controllec

Wiring the CCN Communication Service Jack -- SeeFig. 17-19. To wire the service jack, perform the following:

1. Strip back the jacket from the CCN communicationcable(s) at least 3 inches. Strip l/4-in, of insulation fromeach conductoc Remove the shield and sepm'ate the drainwire from the cable. Twist together all the shield &'ainwires and fasten them together using a closed end crimplug or a wire nut. Tape off any exposed barn wire toprevent shorting.

2. Connect the CCN + signal wire(s) (RED) to Terminal 5.

3. Connect the CCN - signal wire(s) (BLACK) toTermimd 2.

4. Connect the CCN GND sigmd wire(s) (WHITE/CLR) toTermimd 4.

Before wiring the CCN connection, refer to Connect theCCN Communication Bus section for communication bus wir-

ing and cable selection. The cable selected must be identic_d tothe CCN communication bus wire used for the entire network.

The other end of the communication bus cable must beconnected to the remainder of the CCN communication bus. Ifthe cable is installed as a T-tap into the bus, the cable lengthcannot exceed 50 ft. No more than 10 T-taps are allowedper bus. Wire the CCN service jack of the sensor in a daisychain arrangement with other equipment. See Fig. 20. Refer tothe Connect to the CCN Communication Bus section for addi-tiomd details.

\'\ ///

CD

2\ s 4', _" _ RED(+_

\ , _ WHT(GND),' ', CCN COM

\_ BLK_-) ',j .....

\\ _/ BLK_GND) '_; ....- RE-D (SPT) ' j ...... SENSOR WIRING

© ©©

o c\

(/ \:i"

Fig. 17 -- Space Temperature Sensor Wiring(33ZCT55SPT)

/

\ ",.WHT_GND) L'

\ \ " - BLK_-) ',U.

SEN SET

I@1@1@[email protected]\ {,_J \ (T56) ,_

©

Z5Cool Warm

CCN COM

SENSOR WIRING

JUMPER-_TERMINALS

AS SHOWN

"\

Fig. 18 -- Space Temperature Sensor Wiring(33ZCT56SPT)

15

CCN COM

f3-COND UCTORSHIELDED CABLE

[ _ RED (+)

I I WHITE (GND)

/ BLACK (-)

_m RED _SPT)_

SENSOR WIRING I- -I BLACK(GND)_ _/

]. WHITE(T56_ _ _

WIRE ACCESS__HOLE

SWl ___,.

J2 (RJ11 JACK)

J

WHITE (SPEED) / /

\ / BLACK (GND) I SPEED CONTROL\ \ I I

\ \ II iRED(+10V)_ \i /1 \ \ / / r -- _z_ __ __ __

/ k \ / / _( -- -- -\ X / /

i \ X / / /\ \ \ // / /

/ \ " z / _ 3-CONDUCTORSHIELDED CABLE

m

m

m

m

U/

SET POINT

--SENSOR PCBOARD

FAN SPEEDCONTROL

THERMISTOR TEMPERATURESENSOR

LEGEND

CCN -- Carrier Comfort Network@SWl -- SwitchSet Point -- Set Point Adjust

NOTE: Do not connect white wire to SET terminal if set point adjustment is not needed.

Fig. 19 -- Space Temperature Sensor Wiring (33ZCT57SPT)

Table 1 -- Thermistor Resistance vs Temperature Values for Space Temperature Sensor,Return-Air Temperature Sensor, and Supply-Air Temperature Sensor

TEMP (C) TEMP (F) RESISTANCE (Ohms)

0 32 32,851

5 41 25,395

10 50 19,903

15 59 15,714

20 68 12,494

25 77 10,000

30 86 8,056

35 95 6,530

40 104 5,325

45 113 4,367

50 122 3,601

16

Wiring when distance between fan coil controller and space temperature sensor is 50 feet or less:

CCN COMM BUS

/

3 COND COMM CABLE (TYP)50 FT. MAXIMUM

2 COND TWISTEDCABLE OR 3 CONDCABLE (TEMPSENSOR WIRING) (TYP)

45KCFAN COIL UNIT

SPACETEMPERATURE

SENSOR

FAN COIL

CONTROLLER tWiring when distance between fan coil controller and space temperature sensor is gleater than 50 feet:

CCN COMM BUS

2 COND TWISTEDCABLE OR 3 CONDCABLE (TEMPSENSOR WIRING) (TYP)

DISTANCE GREATERTHAN 50 FT,

\

SPACETEMPERATURE

SENSOR

Fig. 20 -- Communication Bus Wiring (42K0 Perimeter Fan Coil Zone Controller Shown)

17

SUPPLY-AIR TEMPERATURE (SAT) SENSOR INSTAL-LATION -- The SAT sensor is required and must be installedin the fan coil air outlet. The part number is 33ZCSENSAT.

The SAT sensor probe is 6 inches in length. See Fig. 9.

When using a ducted supply, the supply-air temperaturesensor should be located in the supply duct downstream of thedischarge of file fan coil to allow good mixing of the supplyairstream.

See Fig. 21 for mounting location. See Fig. 22 for mountinghole requirements.

Disconnect electrical power before wiring tile zone contml-

lel: Electrical shock, personal injury, or damage to file zonecontroller can result.

Do not run sensor or relay wires in the same conduit orraceway with Class 1 AC service wiring. Do not abrade,cut, or nick the outer jacket of the cable. Do not pull ordraw cable with a force that may harm the physical orelectrical properiies. Avoid splices in tiny control wiring.Dmnage to the 33ZCPLNCTL zone controller can result.

Perform the following steps to connect the SAT sensor tothe zone controller:

1. Ix)cate the opening in the control box. Pass the sensorprobe through file hole.

2. Drill or punch a V2-in. hole in the fan coil unit. SeeFig. 22.

3. Use two field-supplied, self-drilling screws to secure thesensor probe to the fan coil unit.

4. Connect the sensor leads to the zone controller's wiringhmness terminal board at the termimfls labeled SAT(RED) and GND (BLK).

Perform the following steps if state or local code requiresthe use of conduit, or if sensor installation requires a cablelength of more than 8 ft:

1. Secure the probe to the fan coil unit with two field-supplied self-drilling screws.

2. If extending cable length beyond 8 ft, use plenum rated,20 AWG. twisted pair wire.

3. Connect the sensor leads to the zone controller's wiringhmness terminal board at the termimds labeled SAT(RED) and GND (BLK).

4. Neatly bundle and secure excess wire.

INDOOR-AIR QUALITY (CO2) SENSOR INSTALLA-TION -- The indoor-tdr quality (CO2) sensor accessory moni-tors cmbon dioxide levels, which provide information used tomonitor indoor air quality. Three types of sensors are provided.The wall sensor can be used to monitor the conditioned airspace. Sensors use infrared technology to measure the levels ofCO 2 present in the all: The wall sensor is available with orwithout an LCD readout to display the CO 2 level in ppm. SeeFig. 11.

Sensor accessory descriptions and part numbers are shownin Table 2. To mount the sensol: refer to the inst_dlation instruc-tions shipped with the accessory kit.

Table 2 -- 002 Sensor Accessories

CO 2 SENSORACCESSORY DESCRIPTION

PART NUMBERS

33ZCSENCO2 Wall Mount Sensor (with display)

33ZCT55002 Wall Mount Sensor with 33ZCT55SPTspace temperature sensor (no display)Wall Mount Sensor with 33ZCT56SPT

33ZCT56002 space temperature sensor and set pointadjustment (no display)

The CO 2 sensors listed in Table 3 are factory-set for a rangeof 0 to 2000 ppm and a linem voltage output of 0 to 10 vdc.Refer to the instructions supplied with the CO 2 sensor forelectrical requirements and terminal locations.

To accurately monitor the qu_dity of the air in the condi-tioned air space, locate the sensor near a return tdr grille (ifpresent) so it senses the concentration of CO 2 leaving thespace. The sensor should be mounted in a location to avoiddirect breath contact.

Do not mount the CO2 sensor in drafty areas such as nearsupply ducts, open windows, fans, or over heat sources. Allowat least 3 ft between the sensor and any comer. Avoid mountingthe sensor where it is influenced by the supply air; the sensorgives inaccurate readings if the supply air is blown directlyonto the sensor or if the supply air does not have a chanceto mix with the room air before it is di'awn into the returnairstream.

SUPPLY SUPPLY

AIR SENSOR DUCT

II

II

i o I

I HC °lI

II

I

TYPICAL

FAN COIL UNIT

1

LEGEND

HC -- Heating Coil

Fig. 21 -- Supply Air Temperature SensorMounting Location (42KC)

3,00

I

o0.50CLEARANCE HOLE

_ENGAGEMENT HOLE FOR

#10 SHEET METAL SCREW (2)

Fig. 22 -- Supply Air TemperatureSensor Mounting

18

Indoor-Air Quality Sensor WMng -- To wile file sensorsafter they are mounted in the conditioned air space or outdoorlocation, see Fig. 23 and the instructions shipped with thesensors. For each sensol; use two 2-conductor 18 AWGtwisted-pair cables (unshielded) to connect the separate isolat-ed 24 vac power source to the sensor and to connect the sensorto the control board terminals. To connect the sensor to thecontrol board, identily the positive (0-10 VDC) and ground(SIG COM) terminals on file sensol: Connect the -10 VDC ter-minal to terminal [AQ and connect the SIG COM terminal toterminal GND.

RELATIVE HUMIDITY SENSOR (WALL-MOUNTED)INSTALLATION -- The relative humidity sensor accessoryis installed on an interior wall to measure the relative humidityof the air within the occupied space. See Fig. 12.

The use of a standard 2 x 4 in. electrical box to accommo-

date the wiring is recommended for installation. The sensor canbe mounted dilectly on the wall, if acceptable by local codes.

If the sensor is installed directly on a wall surface, install thehumidity sensor using 2 sclews and 2 hollow wall anchors(field-supplied); do not orertitqhwn scmm_. See Fig. 16.

The sensor must be mounted vertically on the wall. TheCarrier logo should be oriented correctly when the sensor isproperly mounted.

DO NOT mount the sensor in drafty areas such as nero heat-ing or air-conditioning ducts, open windows, fans, or over heatsources such as baseboard heaters, radiators, or wall-mountedlight dimmers. Sensors mounted in those meas will produceinaccurate leadings.

Avoid comer locations. Allow at least 4 ft between thesensor and any cornel: Airflow near comers tends to bereduced, lesulting in em'atic sensor readings.

Sensor should be vertically mounted approximately 5 ft upfrom the flool: beside the space temperatme sensol:

For distances up to 500 feet, use a 3-conductor. 18 or20 AWG cable. A CCN communication cable can be used,altllough the shield is not required. The shield must be removedfrom the sensor end of the cable if this cable is used. SeeFig. 24 for wiring details.

The power for the sensor is provided by the control board.The board provides 24 vdc for the sensor. No addition_d powersource is required.

Do NOT clean or touch the sensing element with chelnicalsolvents; they can permanently &unage the sensol:

--3 I I

FRESH

AIR

DAMPER

VALVE VALVE HEAT1 24VAC HEAT2

DX_o0oC°_D×_ 0 0 0

ii

'OI _-0

0

[_ czz3EZZ3

24VAC_311I__LINEVOLTAOESEPARATE

POWERSUPPLY

REQUIRED

_ CCNMMUNICATIONS

Fig. 23 -- 002 Sensor Wiring (42K0 Controller Shown)

-- -- 7

EQUIPMENT GROUND

19

To wire file sensor, perform the following:

1. At the sensol: remove 4-in. of jacket from the cable. Stripl/4-in, of insulation from each conductoc Route the cablethrough the wire clemance opening in the center of thesensoE

2. Connect the RED wire to the sensor screw temrinalmarked (+).

3. Install one lead from the resistor (supplied with the sen-sor) and the WHITE wire into the sensor screw terminalmarked (-). After tightening the screw terminal, test theconnection by pulling gently on the resistor lead.

4. Connect the remaining lead flom file resistor to theBLACK wile and secure using a field-supplied closedend type crimp connector or wire nut.

5. Using electrical tape, insulate any exposed resistor lead toprevent shorting.

6. At the control box, remove the jacket from file cable.

7. Strip 1/4-in. of insulation from each conductoc

8. Connect file RED wire to terminal 24 VDC on the controlbomd.

NOTE: The 24 VDC terminal is used forrh sensor wiringonly.

9. Connect the BLACK wire to terminal GND on thecontrol board.

10. Connect the WHITE/CLEAR wire to terminal RH on thecontrol board.

11. Connect shield to earth ground (if shielded wire is used).

HUMiDiTY SENSOR

o

o

FRESHAiR

DAMPER

VALVE VALVE HEAT1 24VAC HEAT2

DXloCOMoDX20 O O O

CCNCOMMUNICATIONS

CCNCOMMUNICATIONS

GROUND

Fig. 24 -- Humidity Sensor Wiring (42K0 Controller Shown)

2O

CO 2 AND SPACE TEMPERATURE SENSORS (Optional) --

The CO 2 and space temperature sensors am comprised of twosensors housed in one unit. They am designed to monitor

carbon dioxide (CO2) levels in the air and measure the interior

building temperature.

Two models tu'e available: P/N 33ZCT55CO2, and

P/N 33ZCT56CO2, which has a set point adjustment potenti-

ometer Both models include a push-button override that maybe disabled through controller software. See Table 3 for sensor

specifications. To convert the CO: sensor into a duct-mounted

CO2 sensok the duct-mounted aspirator (33ZCASPCO2) willneed to be pumhased.

Refer to the instructions supplied with the CO 2 sensor for

electrical requirements and tenninal locations. The zone

controller requires 24 vac 25 va transformer to provide powerto the sensol:

I MPORTANT: The CO: and space temperatum sensor

should be wall-mounted in the occupied space to accu-rately measum the ventilation delivemd to that zone.

Do NOT mount the sensor in the return air duct.

NOTE: Them am 2 locking screws provided on the bottom offile cover for security. A special tool is required to remove andinstall the cover if the locking screws gue used.

The sensor consists of the following hardwam:

1 -- sensor top1 -- sensor base

1 -- mounting plate2 -- machine screws (6 x 32)2- locking scmws

Before performing service or maintenance operations onthe system, turn off main power switches to the unit.Electric shock can cause persomd injury.

Table 3 -- Performance Specification (PIN 33ZCT55002 and 33ZCT56002)

FEATURE

Sensing Method

Sample Method

Measurement Range

Sensitivity

Accuracy

Pressure Dependency

Response Time 0 to 90% Step Change

Warm-Up Time at 77 F (25 C)

Operating Conditions

Storage Temperatures

Agency Certification

Calibration/Interval

Power

Analog CO2 Output

Temperature Sensor

Temperature Control (PIN 33ZCT56CO2 only)

Override Control

Reliability

LEGEND

K_2 -- Kilo-ohm (1000 ohms)RH i Relative HumidityRMS i Root Mean SquareTEMA i Time Extended Measurement

SPECIFICATION

Single Beam Absorption Infrared TM

Patented TEMA self calibration software and 10K temperature sensor

Diffusion

0 to 2000 ppm

_+20 ppm

_+100 ppm60to 90 F: 760 mmHg (15to 32 C)

0.13% of reading per mmHg

<2 minutes

<2 minutes

32 to 122 F (0 ° to 50 C)0 to 99% RH, non-condensing

-4 to +158 F (-20 to 70 C)

FCC Part 15 Class B/CE/CA Energy Commission

Lifetime self-calibrating after 14 days of run time."

18-30 vac RMS, 50/60 Hz -- half wave rectified (dedicated)18-42 VDC polarity protected (dedicated)1.75 VA maximum average power2.75 VA peak power

4-20 mA (Rlmax = 500 Ohms) and 0-10 V (Source 100 mA, Sink 10 mA)

10 K_2 Thermistor, 10 K_2 _+2.5% at 77 F (25 C)

Equipped with a slide potentiometer.

Positions Resistance

Left (Stop) 0 K (+ 5 K)

Right (Stop) 100 K _+10 K

Equipped with a push button that, when depressed, shorts out its internal thermistor.

Meets applicable Carrier reliability requirements

-Automatic background calibration (ABC Logic TM) is a patented self-calibration procedure that is designed to be used in applications whereCO 2 concentrations will drop to outdoor ambient conditions (approxi-mately 400 ppm) at least 3 times in a 14-day period (typically duringunoccupied periods).

21

Step 1 -- Space Temperature Sensor Location -- Tile sensorshould be mounted:

• on tin internal wall near a return air grille or duct• at least 3 ft from any corner, 2 ft from tin open doorway and

4 to 6 ft from the floor

• proximal to the wiling egress on the wall• where temperature operating limits ate 32 to 122 F

The sensor should NOT be mounted:• close to a window, on tin outside w_dl, or next to a door lead-

ing to the outside• close to or in direct airflow of areas such as open windows,

&'arts or over heat sources• in meas with poor air circulation, such as behind a door or in

tin alcove in meas where there are dialnatic temperaturefluctuations or moisture accumulation

• where it is influenced by supply air as the sensor will givetin inaccurate reading

• where it may be exposed to direct occupant breathing, suchas near water coolers or coffee machines.

Step 2 -- Mounting the Space Temperature Sensor -- Thesensor can be mounted on a surface, wall or in a junction box.See Fig. 25-28.

NOTE: Before mounting the sensor: disassemble the sensorinto three p_uts. See Fig. 27.

Su@_z_ or Wall Mounting1. Place the mounting pkite on the wall. MaN file desired

location of the two mounting holes on the w_fll throughthe holes in the mounting plate. See Fig. 25.

2. Pull the wires through the wire hole in the middle of themounting pkite.

3. Drill two mounting holes in the wall in the locationmarked in Step 1.

4. Mount the sensor mounting plate with two wood screwsand anchors (field-supplied).

Junction Box Mounting1. Run wires through knockout in a 2 x 4 in. junction box

(field-supplied).2. Pull wires through the wire hole in the middle of the

mounting plate.3. Secure the sensor mounting plate to the junction box

using the two 6 x 32 machine screws (included).

Step 3 -- Wiring the Space Temperature Sensor -- Performthe following procedure to wire the sensor:

1. Run the wall wiring through the wire hole in the sensorbase. See Fig. 26.

2. Align the top clips and secure the bottom clips of thesensor base to the wall mount plate. See Fig. 27.

3. Gently rock the case fiom top to bottom, using minimalpressure. A "snap" sound will indicate that the sensor issecure. See Fig. 27.

4. Separate the wires into two bundles. One bundle shouldcontain the wires for the CO2 sensor 04 and Jl) and theoilier bundle should contain the wires for the temperaturesensor and CCN 05 and J6). See Table 4 and Fig. 28.

5. Terminate the wires to Jl, J4, J5, and J6. See Table 4 andFig. 28.

6. Push excess wire back through the hole. Align the sensortop over the sensor base.

7. Install the covet on the sensor: Two Allen wrench lockingscrews me provided to lock the cover onto the sensor forsecurity reasons. They are located on the bottom of thecovet: See Fig. 27.

Step 4 -- Space Temperature Sensor St_ut-Up -- Perform thefollowing procedure to stmt up the sensor:

Once the installation is complete, apply power to the sensor:A two-minute warm-up will take place. After two minutes, theLED indicator light will be solid.

22

Measure and read the temperature and CO 2sensor levels byusing a meter or checking the readings at the attached control-let: Be sure the CO 2 levels me above the minimum, up to themaximum acceptable level in the range.

5,25"

P_

I

3"

IL

/IMOUNTINGHOLE

WIRE HOLE

. I]4Fig. 25 -- 002 and Space Temperature Sensor

Mounting Plate

MOUNTINGHOLE

i[ 3" :1,

5.25"

LEGEND

1 -- 3-Pin Terminal Block-- Signal Out2 -- 3-Pin Terminal Block-- Temp Sensor3 -- 3-Pin Terminal Block-- CCN4 -- Wiring Access -- 1.21 in. x ,75 in.5 -- 2-Pin Terminal Block-- Power In6 -- RJ14 Connector-- Service Communication

Fig. 26 -- CO 2 and Space TemperatureSensor Base -- Terminal Connections

SENSORMOUNTING

PLATE

SENSORBASE

SENSORCOVER

Fig. 27 -- Sensor Assembly

J1

ALLEN WRENCHLOCKING SCREWS(HIDDEN)

J4

I

II

I

II

I

I

II

I

0

r

II

I

II

I

I

II

I

0

ISOLATED 24VAC_OR 24 VDCPOWERSUPPLY -

II

I

II

I

I

II

I

0 ©

SHIELDED CABLEGROUNDED ATONE LOCATI_ONO

I

I I

I I

I II I

I I

(5 (53 2 1

1 2 1

I II I

i i I

' ' iI I

SHIELDED CABLE "_ _!-NA_

GROUNDED ATONE LOCATION ONLY.

CON(-)

_ _CNjGAO_N_CCN(_ _ _ TO

TYPICALCARRIER

CONTROLLERSETPOINT_TS_

COMMONSENSOR

2 3

I II I

I I

I I

I II I

I I

I II I

I I

I II

J6 J5

Fig. 28 -- 002 and Space Temperature Sensors -- Typical Field Wiring(P/N 33ZOT55002, 33ZOT56002)

23

Table 4 -- CO2 and Space Temperature Sensors -- Electrical Connections(PIN 33ZCT55CO2, 33ZCT56CO2)

CONNECTOR

J1

J3

J4

J5

J6

LEGEND

CCN i Carrier Comfort Network®

TERMINAL DESIGNATION

2-Pin Power Terminal1 I 24VAC (+) (Dedicated Power Supply)2 1 24VAC (-) (Dedicated Power Supply)RJ 14 ConnectorCCN Service Communication1 I Not Used2 1 CCN (+)3 1 CCN Ground4 1 Not Used5 -- CCN (-)6 1 Not Used

3-Pin Terminal Signal Out1 I 4-20 mA CO2 Output2 -- Common CO 2 Output3 1 0-10VDC CO2 Output

3-Pin Terminal Temp Sensor1 I Thermistor2 1 Common31 Temperature Offset3-Pin Terminal CCN Communications1 -- CCN (-)2 1 CCN Ground3 -- CCN (+)

24

45XC Input and Output Connectors -- The 45XC staged heat) me shown in Fig. 30. All available controller out-zone controller inputs are shown in Fig. 29. Outputs (fan, puts are factoly wiled.

Inputs (J4)

CHANNEL

SPT

SAT

SP OFFSET

PATEMP

RH_AQ

DMPPOS

PRIFLO

REMTCIN

d4 PINS (+,-)

4,6

6,8

10, 12

12, 14

16 (24 VDC),15 (+), 13 (-)

9 (10 VDC)7 (W+), 5 (-)

N/A

2 (24 VAC), 6 (-)

DESCRIPTION

Space Temperature

Supply Air Temperature

Set Point Offset Adjust

Primary Air Temperature

RH/IAQ Sensor

Damper Position

Plenum Pressure Sensor

Unoccupied Override Input

CONTROL DEVICE

10K Thermistor

10K Thermistor

100K Potentiometer

10K Thermistor

2-10 VDC

0-10 VDC

0-5 VDC

0/24 VAC

LEGEND

IAQ -- Indoor Air QualityPATEMP -- Primary Air TemperatureRH -- Relative HumiditySAT -- Supply-Air TemperatureSP -- Set PointSPT -- Space Temperature

NOTE: The 24 v connection (J4-16) is required forRH sensor only.

PRIMARY DAMPER POSITION

GROUND

PLENUM PRESSURE

GROUND

+10VDC SUPPLY

NOT USED

GROUND

-- RH/IAQ

1 3 5 7 9 11 13 15

IIIIIIIIIIIIII J4

IIIIIIIIII IIIIII2

REMTCIN/24VAC _

PATEMP

GROUND

T56 SETPOINT OFFSET

4 6 8 10 12

Fig. 29 -- 45X0 Input Connectors

+24VDC SUPPLY

SPT

GROUND

SAT

Outputs (J5)*

CHANNEL J5 TERMINATIONS DESCRIPTION CONTROL DEVICE

DMPR COW 1,2 Primary Damper CCW 24 VAC, 1A

DMPR CW 2, 3 Primary Damper CW 24 VAC, 1A

HEAT ST1 4, 5 Fan 1 (Increase) 24 VAC, 1A

HEAT ST2 5, 6 Fan 1 (Decrease) 24 VAC, 1A

LEGEND

CCW -- CounterclockwiseCW -- Clockwise

* All outputs are factory wired.

PRIMARY DAMPER --ACTUATOR(OPEN)

GROUND

1 2 3 4 5 6

J I__

PRIMARY DAMPERACTUATOR (CLOSED)

Fig. 30 -- 45X0 Output Connectors

HEAT CLOSE/STAGE 2

COMMON (24VAC)

HEAT OPEN/STAGE 1

25

Connect tothe CCN Communication Bus --All controllers connect to the bus in a d_fisy chain mTangement.The zone controller may be installed on a prim_wy CCN bus oron a secondm-y bus fiom file primary CCN bus. Connecting toa secondaly bus is recommended.

At any baud (9600, 19200, 38400 baud), the number ofcontrollers is limited to 239 zones maximum. When C_uTierlinkage thermostats are used on the same bus as fan coil units,no more than 128 fan coils and 12 linkage fllermostats may beon the same bus. Bus length may not exceed 4000 ft, with nomore than 60 total devices on any 1000 ft section. Opticallyisolated RS-485 repeaters are required evel_y 1000 ft.

NOTE: Carrier thermostats operate at 9600 band.

The first zone controller in a network connects directly tothe bridge and the others are wired sequentially in a daisy chitinfashion. Refer to Fig. 20 for an illustration of CCN communi-cation bus wiring.

The CCN communication bus may also connect to the zonecontroller space temperatme sensol: Refer to the 45XC SensorInstalhnion section for sensor wiring instructions.

COMMUNICATION BUS WIRE SPECIFICATIONS --

The CCN Communication Bus wiring is field-supplied andfield-installed. It consists of shielded thlee-conductor cablewith drain (ground) wire. The cable selected must be identicalto the CCN Communication Bus wire used for the entire net-work. See Table 5 for recommended cable.

Table 5 -- Recommended Cables

MANUFACTURER CABLE PART NO.

Alpha 2413 or 5463American A22503Belden 8772Columbia 02525

NOTE: Conductors and drain wire must be at least 20 AWG(American Wire Gage), stranded, and tinned copper. Individual con-ductors must be insulated with PVC, PVC/nylon, vinyl, Teflon, orpolyethylene. An aluminum/polyester 100% foil shield and an outerjacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a minimumoperating temperature range of -20 C to 60 C is required.

CONNECTION TO THE COMMUNICATION BUS

1. Strip the ends of the red, white, and black conductors ofthe communication bus cable.

2. Connect one end of the communication bus cable to thebridge communication port labeled COMM2 (if connect-ing on a secon&try bus).

When connecting the communication bus cable, a colorcode system for the entire network is recommended tosimplify installation and checkout. See Table 6 for therecommended color code.

Table 6 -- Color Code Recommendations

SIGNAL TYPE CCN BUS WIRE PLUG PINCOLOR NUMBER

+ Red 1

Ground White 2- Black 3

Connect the other end of the communication bus cable to

the temrinal block labeled CCN in the zone controller of

the first air terminal. Following the color code in Table 6,

connect the Red (+) wire to Termimd 1. Connect theWhite (ground) wire to Termimd 2. Connect the Black (-)wire to Temrinal 3.

4. Connect additional zone controllers in a &dsy chain fash-ion, following the color coded wiring scheme in Table 6.Refer to Fig. 20.

NOTE: The communication bus diain wires (shield) must betied together at each zone controller. If the communication busis entilely within one building, the resulting continuous shieldmust be connected to ground at only one single point. If thecommunication bus cable exits from one building and entersanother building, connect the shields to ground at a lightningsuppressor in each building where the cable enters or exits (onepoint only).

Connect Air Pressure TubingCONTROL PACKAGE 4840-- The underfloor controllermeasures the pressure differential between the plenum highand the occupied space low. See Fig. 1. The field-supplied andfield-installed piping are connected to barb fittings on theunderfloor controller with l/4-in, flame retardant polyethylenetubing. All piping for this purpose must be plenum rated andmust conform to local codes.

Figure 15A indicates the positions of the two barb fittings.

Perform the following steps to install and connect the airpressure tubing:

1. Select a location where the airflow tube will be installed.

The location should be one that is away from the unit'sdischarge into the plenum and halfway between that pointand the farthest diffusel: If this requirement is not met,stable airflow measurements may not be possible.

2. Mount the tubing in the plenum securely.

3. Use field-supplied l/4-in, tubing (rated for file application)to connect the high pressure airflow pickup to barb fittingPI on the pressure transducel: At the underfloor control-lek be careful to avoid sharp bends in the tubing, becausemfdfunctions may occur if the tubing is bent too sharply.Use fit least 2 fl of tubing for reading stability.

4. Use field-supplied I/4-in. tubing (rated for the application)to connect the low pressure fitting P2 on the pressmetransducer to file occupied space. Be careful to avoid shmpbends in the tubing because mfflfunctions may occur if thetubing is bent too shmply. Use fit least 2 ft of tubing forstability.

5. The 3/8-in. OD tubing is limited to 25 1lmaximum lengthfor accurate measurement and response. For lengths up to50 fi, use l/4-in. OD tubing. Do not exceed 50 ft tubelengths for either the low or high pressure connections.

CONTROL PACKAGE 4841 (Fig. 31)-- Locate the air-flow probe as shown in Fig. 15B. Perform the following stepsto install and connect the air pressure tubing:

1. Drill a rectangular shaped hole in the ductwork.

2. Securely mount the airflow probe with file high pressureside (black and red tubing) facing into the airflow fi'omthe 45XC terminal.

3. The probe is supplied with 10 fl of tubing from thefactory. If required, it may be extended up to 25 fi usingfield-supplied I/4 in. OD, flmne retarckmt tubing.

26

AIR INTO

PLENUM

AIR FROM 45XC

DISCHARGE PLENUMTEMPERATURESENSOR

LEGEND

Vp -- Velocity Pressure

NOTE: Supply Duct View rotated to show component location,

Fig. 31 -- Component Installation (Control Package 4841)

.*CENTERLINE

bPRESSURE

_PROBE

(FacingintoAidlow)

45U0 UNDERFLOOR SERIESFAN-POWERED TERMINAL INSTALLATION

Physical components of file 45UC underfloor series fan-powered termimd is detailed in Fig. 32. Figure 33 shows 45UCunderfloor terminal unit dimensions and weight &tta.

45UC Hardware- The 45UC underfloor fan-poweredunit contains the 33ZCFANTRM underfloor controllel:

Figure 34 shows the underfloor controller physical details.

45U0 Field-Supplied Hardware -- Each 45UC un-derfloor fan-powered unit requires the following field-suppliedcomponents to complete its installation:

• transformer-- 24 vac, 40 va (stan&ud applications)• contactors (as required for electric heat)• space temperature sensor (33ZCT55SPT. 33ZCT56SPT. or


no. 10 x l/2-in, sheet metal screws (to secure SAT sensor tosupply duct)

• primau-air temperature sensor• changeover sensor (required for 2-pipe applications)• indoor-air quality (CO2) sensor (optional)• relative humidity sensor (optional)• wtlve and actuator for hot water heat (optional)

SPACE TEMPERATURE SENSOR (Fig. 8) -- Each under-floor controller requires a field-supplied C_urier spacetemperature sensol: Them am three sensors available for thisapplication:

• 33ZCT55SPT. space temperature sensor with ovenidebutton

• 33ZCT56SPT. space temperature sensor with overridebutton and set point adjustment

• 33ZCT57SPT, space temperature sensor with overridebutton, set point adjustment, and manu_fl fan speed control

SUPPLY-AIR TEMPERATURE (SAT) Sensor (Fig. 9) -- Theunderlloor controller must be connected to a field-supplied

supply air temperature (SAT) sensor (P/N 33ZCSENSAT) to

monitor the temperature of the air delivered by the fan coil.

PRIMARY-AIR TEMPERATIIRE SENSOR (PAT) (Optional) --

A field-supplied, primary air temperature (PAT) sensor (P/N33ZCSENPAT) is used on an underfloor controller that is lunc-

tioning as a linkage master for a non CCN/linkage compatible air

soume. See Fig. 10.

INDOOR-AIR QUALITY ((702) SENSOR (Fig. 11) --

An indoor _fir quality sensor is required for indoor air qualitymonitoring. Throe different CO 2 sensors am available for zone

CO 2 level monitoring.

• The 33ZCSENCO2 sensor is an indoor, w_fll-mounted

sensor with an LED (light-emitting diode) display.

• The 33ZCT55CO2 sensor is an indoor, wall-mounted

sensor without display. The CO 2 sensor also includes a

space temperature sensor with override button.

• The 33ZCT56CO2 sensor is an indoor, wall-mounted

sensor without display. The CO 2 sensor also includes aspace temperature sensor with override button and tempera-ture offset.

RELATIVE HUMIDITY SENSOR (Fig. 12) --The rela-

tive humidity sensor (P/N 33AMSENRHS000) is an indoor.

wall-mounted sensor and is required for zone humidity control(dehumidification).

CHANGEOVER SENSOR -- The underfloor controller uses

file changeover sensor (33ZCSENCHG) in 2-pipe applications

to determine if it is capable of providing heating or cooling to

file space based on the temperature of the heating and coolingmedium supplied to the unit from the building piping system.

This value may be broadcast to other units.

27

Fig. 32 -- 45UC Series Fan-Powered Underfloor Unit Physical Detail

_67_

7

45U0UNIT SIZE

3

4

L

_21_6_ 1

o

A/

o

8

/

A _Z

c

HI-VOLTAGE jCONTROLENCLOSURE

OPTIONALFILTER &ACCESS DOOR

LO-VOLTAGECONTROLENCLOSURE

INLET SIZE(in,)

9

9

10

BaseUnit

120

128

128

WEIGHT (Ib)

With Hot Water Coil

1-Row 2-Row

132 136

140 146

140 146

With Electric Heat

150

158

158

_H_

PRIMARY AIR INLET

WITH AeroCross TM

MULTIPOINT CENTER

_I_'NGFLOW

F

45UCUNIT SIZE

3

INLET SIZE

9-in. Diameter

9-in. Diameter

10-in. Diameter

B

14

14 12

DIMENSIONS (in.)

D E F

87/8 31/2 55/8

87/8 55/83

97/8 65/8

H L W

101/2 48 21

141/8 48 21

NOTE: All dimensions are in inches.

Fig. 33 -- 45U0 Underfloor Unit Physical Data and Dimensions

28

DAMPER

SHAFT\

\

ACTUATORCLAMPASSEMBLY

LOW PRESSURETUBING ROUTING

/

MECHANICALSTOP

c_ us

GROMMET

\\

ANTI-ROTATIONTAB

ACTUATORRELEASEBUTTON

HIGHPRESSURETUBINGROUTING

NOTE: Actuator clamp accepts dampersshafts with the following characteristics:Round -- 1/4-in. to 5/8-in. (6 to 16 ram)Square -- 1/4-in, to 7/16-ie. (6 to 11 mm)Damper shaft must be a minimum of 1.5-in.(38 ram) long.

Fig. 34 -- 45U0 Underfloor Controller Physical Details (33ZCFANTRM)

45UC Underfloor Series Fan-Powered UnitInstallation


I. Units should be installed under raised access flooring sothat they do not come in contact with obstacles such asrigid conduit, sprinkler piping, Greenfield flexible metalcovering, or rigid pneumatic tubing; such contact cantlansmit vibration to the building structure, causingobjectionable low frequency noise.

2. Fan-powered temrinals require sufficient clealance forservicing the blower/motor assembly, low voltagecontrols from the side and line voltage motor controls orelectric heat (if equipped) from file rear (discharge end) ofthe unit.

NOTE: Be certain that accommodations for panel remov-al of unit casings are large enough to _dlow adequateinternal service room once the panels are removed.A clearance of 18 in. is recommended for control enclo-

sure access. Unit control enclosure will vary dependingon which control package is used. Control enclosurelocation is specified on unit submittals. Ix)w voltageenclosure covers are removable, not hinged.

A clearance of 36 in. is recommended for line voltagemotor controls and electric heat control access. Highvoltage motor controls or electric heat control access issupplied with hinged access doors for units with fuseddisconnect. Specific location is indicated on tile unitsubmittal.

These recommendations do not supersede NEC (Natiom_lElectrical Code) or local codes that may be applicable,which are the responsibility of the installing contractoc


4. Raise unit to position using safe mechanical equipmentand support until hanging means are attached and box islevel.

5. If necessary, use furring strips to level the unit, andanchor units to flool:

STEP 2 -- MAKE DUCT CONNECTIONS

1. Check that the air supply duct connections are airtight.Inst_til supply ductwork on unit discharge, following allaccepted medium-pressure duct inst_dlation procedures.Seal joints against leakage.

NOTE: For maximum efl]ciency in controlling radiatednoise in critical applications, inlet ducts should be fabri-cated of 24-gage minimum sheet metal in place of flexconnections. Flex duct is extremely transpm'ent to radiat-ed sound; consequently high inlet static pressure (Ps) orsharp bends with excessive pressure diop can cause a ra-diated noise problem in the space. If flex duct is used, itshould be limited to the connection between the distribu-tion duct and the boot diffusel:

2. [nst_dl the discharge duct, being cmeful not to reduce theface area of any electric heat section until several diame-ters away from the unit. It is strongly recommended thatlined discharge duct be used downstream of the unit.Insulate duct as required.

3. Fan boxes should not be attached to octopus sectionsimmediately downstream of tile unit.

4. Protect units from damage caused by jobsite debris. Donot allow foreign material to fall into unit. Prevent dustand debris fiom being deposited on motor or fan wheels.

5. Inst_dl optional return-air filters before operating the unit.

6. Leave construction filters supplied with the box in placeuntil installation is complete and building is clemed foroccupancy.

29


Disconnect electric_fl power before wiring or servicing fileunit. All disconnect switches on the terminal (if equipped)should be in the OFF position while making power connec-tions. Electrical shock, pelNonal injury, or damage to filezone controller can result.

All power wiring must comply with local codes and withthe NEC (National Electrical Code) ANSI/NFPA (Ameri-can National Standards Institute/National File Protection

Association) 70-1981. Disconnect switches are optionalequipment. Electrical, control and piping diagrams areshown on the exterior labeling or on a diagram inside thecontrol and high-voltage enclosure covers, unless other-wise specified in the order write-up. All units ale wiredfor a single point electrical connection to the fan andelectric heater (if equipped). Electric heaters provided byCarrier are balanced by kW per stage. The installingelectrician should rotate incoming electric service byphase to help b¢flance overall building load.



4. Observe wiring diagram and instructions attached to theunit. A Wye power source with a fourth (neutral) wirein addition to the full sized ground wile is requiled for480-v. 3-phase units. All units must be grounded asrequired by NEC 424-14 and 250. See Fig. 35-38.

450C Sensor Installation -- See Sensor Installationin 45XC Fan-Powered Zone Mixing Unit Installation.

Connect to the CCN Communication Bus --See Connect to the CCN Communication Bus section in 45XC

Fan-Powered Zone Mixing Unit Installation.

30

,..,J

LEGEND

CCN -- Carrier Comfort Network@SPT -- Space Temperature SensorTRAN -- Transformer

Field WiringFactory Wiring

I

i FANI

CONTACTOR

I

I

I

0

H F23BJ042 '__-

IBLKIRE°IWrit

I

LOW

12

HI

I

Ac C>- i

usE_D

SECON_

DAMPEI

@FAN MOTOR L

LINE

VOLTAGE

II

HEAT1 24VAC HEAT2 I _ _ __

O O O-- I TRANSFORMER

GROUND

/7-7TERMINAL

GROUND

Fig. 35 -- 45UC Underfloor Controller Wiring -- Fan Powered Terminals, Cooling Only

LEGEND

CON -- Carrier Comfort Network® iHWV -- Hot Water ValvePAT -- Primary-Air Temperature Sensor jSAT -- Supply-Air Temperature Sensor i 4SPT -- Space Temperature Sensor I ITRAN -- Transformer J

Field Wiring 4 i

Factory Wiring

*Required only on Linkage master if on a non-compatible air source,

HF23BJ042 O

IBLKIREOIWriT

LOW

HI

I

r

/

I r

(_FAN CON--ACTOR

I

FAN MOTOR

I

E

0_-_ =

--0

0NOT

UsEDO

©

.... i

.... i

NOT USED

LINE

VOLTAGE

CCNCOMMUNICATIONS

CCNCOMMUNICATIONS

_4v_cIt LNE_____A_=N VOLTAGE

I TRANSFORMER

l GROUND

TERMIN_

GROUND

Fig. 36 -- 45U0 Underfloor Controller Wiring -- Fan Powered Terminals, Modulating Hot Water Heat

%,0

I

I

I

L ....

II i

_ / \

HF23BJ042

I

FAN MOTOR

I

IBLKI RED I WriT

1 i*Required only on linkage master if on a non-compatible air source.

Fig. 37 J 45UC Underfloor Controller Wiring -- Fan Powered Terminals, Staged Electric Heat

LINE

VOLTAGE

NOT USED

CCNCOMMUNICATIONS

CCNCOMMUNICATIONS

- - 24VACUa]IF LINE

_- _- _- __t_. _ J]_LV_O_LTAG_E

@ TRAN LEGEND-- I TRANSFQRMER

I GRQUND

fT7 CCN -- Carrier Comfort Network®T£RMINA_'*I -- Heater RelayGR°UNDpAT -- Primary-Air Temperature Sensor

SAT -- Supply-Air Temperature SensorSPT -- Space Temperature SensorTRAN -- Transformer

.... Field Wiring-- Factory Wiring

LEGEND

CCN -- Carrier Comfort Network®HWV -- Hot Water ValveSAT -- Supply-Air Temperature SensorSPT -- Space Temperature SensorTRAN -- Transformer

Field WiringFactory Wiring

0

HF23BJ042

I

I B'KIREOIWriT

\ /

/t

FAN CONTACTOR

I

I

LOW i_NAC

i O--I

©NOT USED

oHEAT3

©

SECOND _DAMPER

HI

l

FAN MOTOR 1LINE

VOLTAGE

O

OFL 3._1

o

O

D

7O-

G-

O--

O

'11

_2

m

NOT USED

CCNCOMMUNICATIONS

CCNCOMMUNICATIONS

L 'IEATI24V H T ............. - _4vtc

L 0 _

I TRA_FORMER

I GROUND

TERMINALGROUND

Fig. 38 -- 45UC Underfloor Controller Wiring -- Fan Powered Terminals, Two-Position Hot Water Heat

LINE

VOLTAG E

Modulating Baseboard Hydronic Heating-Install the water valve on the leaving water end of the base-bomd heatel: See Fig. 39. Observe the fluid flow directionwhen mounting the valve. Be sure to properly heat sink thevalve and direct the flmne away from the actuator and valvebody when sweating the valve connections. Install the leavingwater temperature sensor (P/N 33ZCSENCHG) on thehydronic heating coil as shown. The sensor accommodatesnominal copper pipe from 1/2 to 1 in. (OD sizes from 5/8 to11/8 in.). It should be secured to the pipe with the clampsupplied. If piping is kuger than 1 in. nominal size, a field-supplied clamp must be used. Use fiberglass pipe insulation toinsulate the sensor assembly.

Refer to Fig. 36 to wire the modulating water valve and thesensor to the underfloor controllel: Connect the leaving watertemperature sensor to the controller using the wiring connec-tions shown for the SAT sensol:

NOTE: The leaving water temperature sensor replaces the SATsensor in this application.

Use 18 or 20 AWG wire for all connections. The watervalve actuator housing may be used as a junction box if theleaving water temperatme sensor cable is not long enough andthe sensor cable must be extended to reach the controllel:

For modulating hydronic heating applications, the defaultconfiguration must be changed to properly control the valve.Refer to the service configuration table and set the HeatingIx)op pm'ameters as follows:

Proportional Gain = 20.0Integral Gain = 0.5Derivative Gain = 0.0Start Vgdue = 102.0

Also, set the Ducted Heat decision to YES and set the Max-imum Duct Temperature decision equal to 200 E

33ZCSENCHG(SENSOR)

1/2"TUBE3N"TUBE1"TUBE

Fig. 39 -- Typical Water Valve andSensor Installation

35

42KC PERIMETER FAN COILUNIT INSTALLATION

Physical components of tile 42KC fan coil unit is detailed inFig. 40. Refer to Fig. 41 for 42KC fan coil unit details.

42KC Hardware- Tile 42KC perimeter tim coil unitcontains tile 33ZCFANCOL zone controllel:

Figure 42 shows tile 42KC perimeter fan coil controllerphysical detgdls.

Fig. 40 -- 42KC Fan Coil Unit Physical Details

INLET VIEW

TB

INLET SCREEN_

T ..............................

B

J_Z222222tI25252

........t-!......

--A--

TOP VIEW

_16_

L

DISCHARGE VIEW

NOTE: All dimensions are in inches.

42KCUNIT SIZE

INLET SIZE(in,)

14 12 x 101/2

16 14 x 97/8

BaseUnit

120

128

WEIGHT (Ib)

With Hot Water Coil

1-Row 2-Row

132 136

140 146

With ElectricHeat

150

158

8

42KC DIMENSIONS (in.)UNIT SIZE A B C E H L W

14 12 101/2 173/4 113/4 14 18 347/8

16 14 97/8 173/4 133/4 16 19 347/8

Fig. 41 -- 42KC Fan Coil Unit Physical Data and Dimensions

36

c_us

FAN ON

LOWMED

on, ,,or-/ ; Aoi

Part Number: 33ZCFANCOL _ = DAD ENA=

S/N:

Bus&

Element#:m

Unit#:

J5

RH

GND

IAQ

+lOV

SPEED

GND CNC3ONDSW

GND

Fig. 42 -- 42KC Perimeter Fan Coil Controller Physical Details (33ZCFANCOL)

42KC Field-Supplied Hardware -- Each 42KC pe-rimeter fan coil unit requires the following field-suppliedcomponents to complete its installation:

• transformer-- 24 vac, 40 va (stan&ud applications)• contactors (as required for fan or electric heat)• space temperature sensor (33ZCT55SPT, 33ZCT56SPT, or


no. 10 x l/2-in, sheet metal screws (to secure SAT sensor tosupply duct)

• changeover sensor (required for 2-pipe applications)

• indoor-air quality (CO2) sensor (optional)• linkage thermostat (optional)• relative humidity sensor (optional)• wtlve and actuator for hot water heat (optional)

SPACE TEMPERATURE SENSOR -- Each zone control-let requires a field-supplied Carrier space temperature sensor.There _ue four standard temperature sensors available for thisapplication:

• 33ZCT55SPT, space temperature sensor with ovemdebutton

• 33ZCT56SPT, space temperature sensor with ovemdebutton and set point adjustment

• 33ZCT57SPT, space temperature sensor with ovemdebutton, set point adjustment, and manual fan speed control

• 33ZC58SPT. space temperature sensor with override button,set point adjustment, and fan speed control, and LCDdisplay

SUPPLY-AIR TEMPERATURE (SAT) SENSOR -- Thezone controller must be connected to a field-supplied supply-air temperature (SAT) sensor (P/N 33ZCSENSAT) to monitorthe temperature of the air delivered by the fan coil.

CHANGEOVER SENSOR -- The 33ZCSENCHG change-over sensor is used by the 42KC zone controller in 2-pipeapplications to determine the temperature of the medium whichis supplied to the fan coil by the building piping system. Thecontroller can then determine if it is capable of providing heat-ing or cooling to the space based on sensing the pipe watertemperature. This value may be broadcast to other fan coils if alinkage thermostat is used or the controller is part of a CCNsystem with a comfort controllel:

INDOOR-AIR QUALITY (CO2) SENSOR -- An indoor-airquality sensor is required for indoor air quality monitoring.Three different CO 2 sensors are available for zone CO 2 levelmonitoring. One is used to measure CO 2only, while two othermodels combine the CO9 sensor with a space temperature sen-sor to eliminate the need-for multiple sensol,s in each zone.

• The 33ZCSENCO2 sensor is an indool: wall-mountedsensor with an LED (light-emitting diode) display.

• The 33ZCT55CO2 sensor is an indoor, wall-mountedsensor without display. The CO 2 sensor also includes aspace temperature sensor with override button.

• The 33ZCT56CO2 sensor is an indoor, wall-mounted sen-sor without display. The CO2 sensor also includes a spacetemperature sensor with ovemde button and temperatureoffset.

LINKAGE THERMOSTAT -- The linkage thermostat(33CSKITLST-01) can be used to control multiple 42KC unitsfi_m a single thermostat.The linkage thermostat provides ther-mostat functions for up to 8 units serving a common zone.Thermostat functions include space temperatme sensing,remote set point adjustment, and occupancy information. Thelinkage themlostat can be used in place of any space tempera-ture sensoE

RELATIVE HUM[DITY--The relative humidity sensor(P/N 33AMSENRHS000) is an indoor, wall-mounted sensorand is required for zone humidity control (dehumidification).

42KC Perimeter Fan Coil Unit Installation


1. Units should be installed under raised access flooring sothat they do not come in contact with obstacles such asrigid conduit, sprinkler piping, Gleenfield flexible metalcovering, or rigid pneumatic tubing; such contact cantransmit vibration to the building structure, causingobjectionable low frequency noise.

2. Fan-powered termimfls require sufficient cle_u'ance forservicing the blower/motor assembly, low voltage con-trois from the side and line voltage motor controls orelectric heat, if equipped, from the rear (discharge end) ofthe unit. See Fig. 43.

NOTE: Be certain that accommodations for panel remov-ed of unit casings gue large enough to allow adequate in-ternal service room once the panels gu'e removed.

37

_1 IN,

AIR FLOW " _ i - "', ALLOW 1 IN. CLEARANCE

' -" =" ' FROM TOP OF UN T TO

÷ €-: ,,?'.',', :11 BOTTOMOFFLOORINGHC ,; F F, ;TOO,L

DISCHARGE DUCTELECTRIC OR HOT WATER

Fig. 43 -- Service Clearance for Fan CoilUnit Installation

A clearance of 18 in. is recommended for contlol enclo-sure access. Unit control enclosure will valy dependingon which control package is used. Control enclosurelocation is specified on unit submittals. Low voltageenclosure covers are removable, not hinged.

A clearance of 36 in. is recommended for line voltagemotor controls and electric heat control access. High volt-age motor controls or electric heat control access issupplied with hinged access dool.s for units with fuseddisconnect. Specific location is indicated on the unitsubmittal.

These recommendations do not supel.sede NEC (NationalElectrical Code) or local codes that may be applicable,which am the responsibility of file inst_dling contractol:


4. Raise unit to position using safe mechanical equipmentand support until hanging means tue attached and box islevel.

STEP 2--INSTALL UNIT-- If necessary, use furringstrips to level the unit, and anchor units to flool:

STEP 3 -- MAKE DUCT CONNECTIONS

1. Check that the air supply duct connections are airtight.Install supply ductwork on unit discharge, following _fllaccepted medium-plessure duct installation procedures.Seal joints against leakage.

NOTE: For maximum eft]ciency in controlling radiatednoise in critical applications, inlet ducts should be fabri-cated of 24-gage minimum sheet metal in place of flexconnections. Flex duct is extremely transparent to radi-ated sound; consequently, high inlet static pressure (Ps)or sharp bends with excessive pressure &op can cause aradiated noise problem in the space. If flex duct is used, itshould be limited to the connection between the distribu-tion duct and the boot diffusel:

2. Install the discharge duct, being careful not to reduce theface area of any electric heat section until several dimne-ters away from the unit. It is strongly recommended thatlined discharge duct be used downstremn of the unit.Insulate duct as required.

3. Fan boxes should not be attached to octopus sectionsimmediately downstream of the unit.

4. Protect units from damage caused by jobsite debris. Donot allow foreign material to fall into unit. Prevent dustand debris from being deposited on motor or fan wheels.

5. Install optional return-air filters before operating the unit.

6. Leave construction filters supplied with the box in placeuntil installation is complete and building is cletued foroccupancy.


Disconnect electrical power before wiring or servicing the

unit. All disconnect switches on the temrinal (if equipped)

should be in the OFF position while making power connec-

tions. Electrical shock, personal injury, or &image to thezone controller can result.

1. All power wiring must comply with local codes and withthe NEC ANSI/NFPA (American Natiomd StandmdsInstitute/National Fire Protection Association) 70-1981.Disconnect switches are optional equipment. Electric_d,control and piping diagrams are shown on the exteriorlabeling or on a diagram inside the control and high-voltage enclosure covers, unless otherwise specified inthe order write-up. All units are wired for a single pointelectrical connection to the fan and electric heater (ifequipped). Electric heaters provided by Carrier arebalanced by kW per stage. The installing electricianshould rotate incoming electric service by phase to helpbalance overall building load.



4. Observe wiring diagram and instructions attached to theunit. A Wye power source with a fourih (neutral) wire, inaddition to the lhll-sized ground wire, is required for480-v, 3-phase units. All units must be grounded asrequired by NEC 424-14 and 250.

Connoet tho Powor Transtormor -- An individual,field-supplied, 24 vac power transformer is required for eachzone controllel: Transfonnel.s must be UL Class 2 rated. Stan-diud applications require a 24 vac tmnsformel; rated at 40 vaminimum. All transformer secon&tries tue required to begrounded. Use only stranded copper conductol.s for all wiring tothe zone controllel: Wiring connections must be made in accor-dance with NEC and loc_d codes. Ground one side of the trans-former secon&uy at the transformer location. Connect thegrounded side of the transformer to J1-2. Connect the hot side ofthe transformer secon&uy to J l-l. Connect an 18-gage, greenground wire from terminal J1-3 to the metal chassis of the unit.

For zone controllers, the power requirement sizing allowsfor a water valves accessory and for the fan contactol: Watervalves tue limited to 10 va on both two-position and modulat-ing hot water. The fan contactor is limited to 3 va (holding) foreach fan output.

NOTE: If a water valve contactor exceeds these limits, orextern_d contactors tue required for electric heat, then it isrecommended that a 60 va transformer be used. The maximum

rating for any single output is 20 va.

NOTE: Do not run sensor or communication wiring in thesame conduit with line-voltage wiring.

NOTE: An accessory conduit box (P/N 33ZCCONBOX)is available for conduit wiring connections to the zonecontroller.

Perform the following steps to connect the powertransformer:

1. Install the field-supplied transformer in an electric_denclosure that conforms to NEC and local codes.

2. Connect 24 vac from the transformer as shown in the

applicable wiring diagram (Fig. 44-48). Be sure toobserve polarity when connecting the transformer powec

38

,..,a

Power

Supply

RED RED

L_

BROW_ _12

_ FAN

RELAY#2

:1TO Confrol[er

Term 81o¢k Or

Opl L e us_

_] 20/277V...... 1_ EO_OI__DEs¢ Swl}ch (Optio_ol)

^ ^

v

BLACK I12

FAN

RELAY

_3

BLUE #18

o

RED

TO Control ler TO Control let

/

RED I

Bl_e lq8

Red _18

n_rol [er

LEGEND

AFS i Airflow SwitchCAP -- CapacitorCOM -- CommonDISC- DisconnectN.O. -- Normally OpenSCR -- Electronic Speed Controller

Fig. 44 -- Typical 42K0 115/277 V, Single-Phase, 1-Stage, 1-Element Wiring Diagrams forFan-Powered Units with Electric Heat

4_

L BLACK

POWER 08/240VSUPPLY

RED

USE COPPER _

CONDUCTORS ONLY

(PIGTAILS COME WITH OPTIONAL

DISCONNECT SWITCH ONLY)

TRANSFORMER

TERM BLOCKOR OPTIONAL

DISC SWITCH

I::l

24V

c-i

+

co

/\

RED

OPTIONAL _ _-

_OTOR_UBE_L_y_ BLACK#_2BLACK #12_

FANRELAY

#2

RED

:Y-d_

RED

BLACK #12

BLUE #18

2

o

m

/

IscR#2JL_

BROWN #12

RELAY

BLUE #18

oi

2v

3/\

TO LOW VOLTAGE CONTROL BOX

WHITE #12

BLACK #12

RED

t(

oc0-%

U

ov

z

/

RED

1]scR #i

FAN

RELAY

#_

LEGEND

CAP -- CapacitorDISC- DisconnectSCR -- Electronic Speed Controller

Fig. 45 -- Typical 42KC 208/240 V, Single-Phase Wiring Diagrams forFan-Powered Units Without Electric Heat

4_

33ZCFANCOL

CONTROLLER _

/ J4

JT_J6 YEL _18

YEL _18

\ e e e _ _

\ RED #18IST STAGE HEAT /

2@ STAGE HEAT _ WRITE #18

FAN RELAY 3

FAN RELAY 2

FAN RELAY 1

24 VAC TRANSFORMER

75VA MIN

+24V

SPT

0/

SAT

T56

GND

PAT

N/A

YEL #18

BLU #18

BLACK _18

BROWN _18

ORANGE #18 [_

BLU #18 Q

YEL _18

_i BLKr _

_q REDI

Fig. 46 -- Typical Low Voltage Control Wiring Diagram for42KC Fan-Powered Units with Up to 2 Stages of Electric Heat

1 SPACE TEMPERATUREI

i SENSORJ_ (FIELD SUPPLIED)

SUPPLY AIR

TEMPERATURE SENSOR

(FACTORY SUPPLIED

HH79NZO74)

LEGEND

.... Field Wiring__ Factory Wiring

NOTE: These controls have been wired tocomply with UL-1995,

33ZCFANCOL

CONTROLLER _

/

YEL #18

ORA _18

YEL _18

÷24V

@SPT

0/

GN " y

"-r BLK

SA_ '_ REDT56

GND

PAT

J4 @N/A

e,

YEL _18YEL #18

BLU _18

GREEN e18_

FAN RELAY 3 > BLACK #18

FAN RELAY 2 > BROWN #18

FAN RELAY I >ORANGE #18 _]

24 MAC TRANSFORMER > BLU #18 Q

TBVA MIN > YEL #18

Figi 47 -- TypicalLow VoltageControlWiring Diagram for42K0 Fan-Powered Units with On/Off Hot Water Heat

r SPACE TEMPERATURE

E SENSOR I

SUPPLY AIR

TEMPERATURE SENSOR

(FACTORY SUPPLIED

HH79NZ074)

LEGEND


NOTE: These controls have been wired tocomply with UL-1995,

4_

33ZCFANCOLCONTROLLER

YEL _18

ORA _18

YEL _18

FAN RELAY 3 > BLACK _18

FAN RELAY 2 > BROWN#18

FAN RELAY I >ORANGE_18

24 VAC TRANSFORMER > BLU #18

75VA MIN > YEL _18

+24V

SPT0

/

GN_ _SAT

T56

GND

PAT

N/A

YEL #18

BLU N18

GREEN _18_

r_ ......

_ BLK

_n RED

Fig. 48 -- Typical Low Voltage Control Wiring Diagram for42KC Fan-Powered Units with 3-Point Floating Valve

SPACE TEMPERATUREE

SENSOR4

-r (FIELD SUPPLIED)I

SUPPLYAIRTEMPERATURESENSOR(FACTORYSUPPLIEDHH79NZO74)

LEGEND


NOTE: These controls have been wired tocomply with UL-1995.

Fan Coil Controller Inputs and Outputs -- _q_efan coil controller inputs and outputs are shown in Fig. 49and 50.

CONNECT ACCESSORIES -- Refer to accessory installa-tion instructions for installation procedures. Fan coil controller

wMng is shown for the linkage thermostat, which is an option-al accessory (Fig. 51 ).

42KC Sensor Installation -- See 45XC Sensor Instal-

lation section on page 14.

Inputs (J4)

CHANNEL

SPT

SAT

SP OFFSET (T56K57)CNGOVR

RH

SPEED

IAQ

FS OR REMOTE _S

J4 PINS/*'-)14, 12

10, 12

8,12

4,6

16 (24 VDC),15 (+), 13 (-)

7 (+), 5 (=)

11 (+), 13 (-)

2 (24 VDC),J1 Pin 1 (Gnd)

DESCRIPTION

Space Temperature

Supply Air Temperature

Set Point Offset Adjust

Changeover Sensor

RH Sensor

Manual Speed Position

Indoor Air Quality SensorFan Status or

Remote Start/Stop

CONTROL DEVICE

10K Thermistor

10K Thermistor

100K Potentiometer

10K Thermistor

2-10 VDC

0-10 VDC

0-10 VDC

24 VAC (DI)

LEGEND

DI -- Direct InputFS -- Fan StatusIAQ -- Indoor Air QualityRH -- Relative HumiditySAT -- Supply-Air TemperatureSPT -- Space TemperatureSIS -- Start/Stop

NOTES:1. Terminals 1 and 3 provide switched

24 VAC output power to the load.2. Terminal 5 connects to field-supplied

24 vac.

3, The 24 v connection (J4-16) isrequired for RH sensor only.

MANUALSPEED

GROUND

NOT USED

GROUND

FAN STATUS OR REMOTE S/S

CHANGEOVER SENSOR

GROUND

T56SETPOINT OFFSET

1 3 5 7 9 11 13 15

!l=l=l=l=l=l=l=

I=I=1=1=1=1=1=1=2 4 6 8 10 12 14 16

I F__

i

Fig. 49 -- 42KC Fan Coil Controller Inputs

NOT USED

IAQ

GROUND

-- RH

J4

+24VDC SUPPLY

SPT

GROUND

SAT

44

Daughter Board Outputs (J6, J7)

CHANNEL TERMINATIONS(+,-) DESCRIPTION CONTROL DEVICE

FAN AC J6-1, J1-1 Fan Input Power 24V, 5A

FAN ON J6-2, J1-2 Fan Start/Stop* 24V, 5A

LOW J6-3, J1-2 Low Speed 24V, 5A

MED J6-4, J1-2 Med Speed 24V, 5A

HI J6-5, J1-2 High Speed 24V, 5A

CAD J7-1, J7-2 Outdoor Air Damper 24 VAC 1A

*For single-speed fan units, connect fan start/stop to control fan contactor.

NOTE: J6-1 must be jumpered to 24 VAC +. (J1-1).

J6 J7

FAN (24VAC) --

FAN ON

LO SPEED

MED SPEED

HIGH SPEED

1 2 3 5

l1 2

24VAC _

CAD

Fig. 50 -- 42K0 Fan Coil Controller Daughter Board Outputs

(GND)

(+)

WHITE(GND)

FAN COIL UNIT

WIRENUT

SHIELD

(4

t

NIRE WITH (+)

SGREEN/wHITE(GND)

CCN

BUSCOMMUNICATIONLINKAGE -_tTHERMOSTAT WIRINGCONNECTION BLOCK

/

tXXXXXXl

WHT RED

COMMUNICATION BUS

_<___ MAXIMUM

24 VAC .........WIRE LENGTH

TRANSFORMER W- = OF 100 FT.(SEPARATEISOLATED) R+

POWERSUPPLYBOARD

Fig. 51 -- 42K0 Wiring Connections (Linkage Thermostat Option)

©COOL

©

d:C_

LEGEND

CCN -- Carrier Comfort Network@FCC -- Fan Coil Controller

45

35BF DIFFUSER INSTALLATION

35BF-R Swirl Diffuser Installation -- Hole open-ings for diffusers ale pre-cut in the floor panels at the factory.Removal of flooring is not necess;uy to install the diffilsers.

Inst;_ll diffusers after flooring and carpet installation iscomplete through the top panel by placing the unit into thegasketed positive compression quick mount underfloor ring.

Secure the gasketed quick mount underfloor ring to the trimring on the underside of file raised panel. See Fig. 52.

35BF-CT, D, V Linear Diffuser Installation --Removal of flooring is not necessary to install the 35BF-Dlinem floor diffuser plenum and 35BF-V vmiable volumediffuser plenum with damper; they can be installed into raisedflooring from the top surface. See Fig. 53 and 54.

The 35BF-CT rectanguku floor grilles/diffuser frame maybe used wifll either of the linem floor diflilseL's. See Fig. 55 fordimension and deflection information.

THROW DIFFUSER CORE7 3/4" DIAMETER

ADJUSTED FLOW

REGULATOR (OPTIONAL)

_F 9 3/4" ._@LANGE 1"

""T,LEFLOOR// 1/4''°/"

f TRIM RING WITH SPACE FLANGES

(MUST BE USED WITH THIS ASSEMBLY)

Open/Close indicator is raised from

trim ring and diffuser core

GASKETED POSITIVE COMPRESSION

_ QUICK MOUNTED UNDERFLOOR RING

/ 10 7/16" DIAMETER

HOLE OPENING FOR

DIFFUSER IS 8 5/8"

FLOORTILE

Fig. 52 -- 35BF-R Adjustable Swirl Diffuser

46

_DIFFUSER CORE 3 -DIFFUSER FRAME ( 5BF CT)

\

\\

\

fATTACH DIFFUSER FRAMETO 35BF-CT WITH #8 SELFDRILLING SCREWS.

(FIELD-SUPPLIED)

ACCESS FLOORING

(BY OTHERS)

\

• \\

\

, \\ \

\

\\

I8 5/8"

FIELD INSTALLATION

r V DIFFUSER FRAME

_'1 _/FLOOR PANEL

_""- ATTACHM ENT SCREWS

O K (ASSEMBLED PRIOR TO

TALLATION INTO FLOOR)

35BF-D ASSEMBLY

NOTE: 35BF-CT Diffuser Frame and 35BF-D

plenum are sold as separate units.

16 _

o o

1 1/8"

Fig. 53 -- 35BF-D Linear Floor Diffuser Plenum

k 8" =1

° I

1

47

(35BF-CT)

ATTACH DIFFUSER FRAME

TO 35BF-V WITH #8 SELFDRILLING SCREWS.

(FIELD-SUPPLIED)

\\

\

ACCESS FLOORIN_(BY OTHERS)

8 5/8"

FIELD INSTALLATION

DIFFUSER FRAME

//ff/FLOQR PANEL

(ASSEMBLED PRIOR T©

INSTALLATION INTO FLOOR)

35BF-V ASSEMBLY

NOTE: 35BF-CT Diffuser Frame and 35BF-V plenumare sold as separate units.

8 I_

o

I I ° /

16 I_

o o

[] 0 01/4"

I3 1/2'1, 12"

111/2"I6 _

1

Fig. 54 -- 35BF-V Variable Volume Diffuser Plenum

48

35BF-CT ALUMINUM -- FIXED BARS

CT-480 -- 1/4-in. SPACING, 1/8-in. BARS, 0° DEFLECTIONCT-481 --1/4-in. SPACING, 1/8-in. BARS, 15 ° DEFLECTION

CORE WITH HEAVY DUTY MOUNTING FRAMEFOR FLOOR APPLICATIONS

Type 5 heavy duty mounting frame is shown.

NOTE: Core is furnished with additional reinforcing,

HEAVY DUTY MOUNTING FRAMEFOR FLOOR APPLICATIONS

Frame Type 5• 1 in. Flange

Removable core is furnishedwith frame. When spring clipis furnished, add an addi-tional 1/4in. to duct width.

11/32" 4 h

I-,_, D = Duct SEze

FACE VIEW OF FRAME

/

\

17 3/8"

9 3/8"

AVAILABLE CORES

[] Check Selection

1/4 in. Spacing1/8 in. Bars

[] MODEL CT-480

0 ° DEFLECTION

[] MODEL CT-481

15 ° DEFLECTION

DUCT SIZE MINUS 3/4"

1/4,,F ,/s,,qTTTTTTTTIIIIIIIII 15/_2"

SUPPORT BAR

DUCT SIZEMINUS 3/4"

1/8" •

OVERALL LENGTH AND WIDTH

Length

Core//

k cD

• O

DUCT SIZE FRAME CORE

TYPE D O C

5 16 173/8 153/8

Width

1/4 in. SPACINGDUCT SIZE FRAME CORE NUMBER OF

D O C BLADES

8 93/8 73/8 29

Fig. 55 -- 35BF-CT Rectangular Floor Grille

49

OPERATION

Initial Start-Up Procedures -- The 45UC undertloorfan terminal units and 42KC perimeter fan coil units tuedesigned to provide varying quantities of cold primaly air to aspace in response to a thennostat demand for cooling. For aheating demtmd, the fan will operate to supply ceiling plenumair to file space or for units equipped with a heating coil, fileheater will operate as required to meet a heating demand.

The 45XC fan-powered mixing box is designed to provideairflow to an underfloor plenum at a specified pressure setpoint. The air supplied to the plenum is a mixture of primary airand ceiling plenum air. The fan speed is adjusted automaticallyby the control to provide the required airflow to maintaindesired plenum temperature set point while the primary tdrdmnper will modulate to maintain the desired plenum pressure.In response to a cooling demand from a thermostat, the damperwill increase the mnount of cold prima U air while the fanreduces the amount of ceiling plenum air to decrease the tem-perature of the air being delivered to the space. Typical plenumdesign temperatures tue approximately 62 to 63 E but the45XC zone controller will automatically adjust the temperatureto meet the load conditions and maintain the balance point.

The 45UC underfloor fan terlninal control packages providepressure independent operation of the prima U air &tmper.regardless of changes to the available static pressure in the pri-mary supply. To balance the unit, it is necesstwy to set both theminimum and maximum airflow set points of this controllel:The many types of control options available each have specificprocedures required for balancing. Refer to the submittal infor-mation for these requirements.

NOTE: The following steps MUST be followed in order toproperly operate and service this unit.

1. Disconnect ;dl electrical power to the unit.

Ftdlure to disconnect the power to the fan box prior tochecking and/or sel-cicing the fan box could result in seri-ous personal injmy.

2. Verify that the fan box is inst;flled level and that adequatemounting support has been provided.

3. Remove motor access panel from the bottom of the fanbox, and also remove the control panel covel:

4. Test the fan motor setscrew. The setscrew should tittightly, but it may have loosened during shipment orinstallation.

5. Rotate the blower by hand to ensure proper clearancebetween the blower and the blower housing.

6. Check the fan box for loose fiberglass insulation, espe-cially on the electric heater elements or the hot water coils(if these accessories me inst;flled).

7. Check the control enclosure and remove tiny debris.

8. Check the induction inlet filter (if provided) for obstruc-tions, and verify the filter is securely in place.

9. Verify the main power supply to the connection to the fanbox for proper voltage.

10. Identify the control system supplied.

11. Check all control connections (and/or electric) for properinstallation.

12. Connect electrical power

45XC Start-Up and Checkout Procedure

Before proceeding with start-up, be certain that voltage,fiequency, and phase correspond to unit specifications.Unless noted, all fan motors are 60 Hz, 115, 208/240, or277 vac electric heat. The electric heat voltage mayexceed the blower motor voltage requirement. Exces-sive voltage to the fan box may seriously damage it.Verify that the DDC (if equipped) is receiving 24 vac,-15%, +20%.

All underfloor terminal units are shipped with cardboardpackaging rings placed in one side of the blower hous-ing internal to the blower/motor. These rings are pro-vided to prevent damage to the motor during shipment.The rings MUST BE REMOVED prior to operation.The packing rings are accessible through the terminal'splenum. Turn the fan wheel by hand to ensure thatblower is free spinning. Carrier will not accept responsi-bility for any additional costs for removal of this pack-aging material. Failure to remove cardboard rings couldresult in damage to the unit.

Before balancing the system, the air handlers must be oper-ating in accordance with the specifications for air capacity, stat-ic pressure, and temperature. The following items MUST bechecked:

1. All fans must be running fit c;dculated and specified rpm.

2. Permanent or tempormy tilters must be clean andinst;dled where required.

3. All central station dampers must be adjusted and operat-ing properly.

4. All thermostats must be calibrated and fit file desired

settings.

5. All ductwoN must be tight.

6. All dirt or loose lining must be removed from insideductwork.

7. Pumps and sprays, when used, must be in operation.

8. Connections to the coil, when used, must be checked.

9. Water control valve, if used, must be checked.

42KC Start-Up- Use the Cmrier Comfort Network®communication software to stmt up and configure the fan coilcontrollel: All set-up and set point configurations are factory-set and field-adjustable.

Changes can be made using the ComfortWORKS® soft-ware, ComfollVIEW TM software, or Network Service Tool.The Network Service Tool is a portable interface device thatallows the user to change system set-up and set points from azone sensor or terminal control module. During st;ut-up, theCmrier soflwme can also be used to verify communicationwith each fan coil controller

For specific operating instructions, refer to the literatureprovided with the soflwm'e.PERFORM SYSTEM CHECK-OUT

1. Check correctness and tightness of all power and commu-nication connections.

2. At the fan coil, check fan and system controls for properoperation.

3. At the fan coil, check electrical system and connectionsof any optional electric reheat coil. If hot water reheat isused, check piping and v;dves against job drawings.

5O

4. Ensure that area tuound the fan coil is clear of construc-

tion dirt and debris.

5. Check that final filters tue installed in the fan coil. Dust

and debris can advel5ely affect system operation.

6. Verify that the fan coil controller controls am properlyconnected to the CCN bus.

INITIAL OPERATION AND TEST -- Perform the follow-

ing procedure:

1. Apply power to the unit.

2. Connect the service tool to the phone jack service port ofthe controller.

3. Using the service tool, upload the controller flom addiess

0,1. The ad(kess may be set fit this time. Make sum that

Service Tool is connected to this fan coil unit only when

changing the ad&'ess.

CONFIGURATION

45XC Commissioning-- The Commissioning func-tion permits the user to calibrate the &tmper position and zero-calibrate the pressure sensol: Commissioning is performed us-ing points on the maintenance display (see Table 7).

Table 7 -- Commissioning Function

FUNCTION CODE DESCRIPTION

CMODE Commissioning Mode

CALIBRAT Damper/Transducer CalMAXCOOL Maximum Cooling Pressure

MINCOOL Minimum Cooling PressureINPUTHEATOVER Maximum Heating PressureCOMCFM Pressure Set Point

MVP Actual Plenum Pressure

SAT Supply Air TemperatureMODE Terminal Mode

OUTPUT CAL Auto CalibrationOFFSET Pressure Transducer Calibration

Offset (internal point)

PROCESS (ALGORITHM) -- If the Calibration mode is setto Enable, the controller will interrupt its normal control to pro-vide a means for an air balancer to easily test and commissionthe equipment. Once in the Commissioning mode, the controlwill remain in that mode until all tests are completed or for amaximum of 1 horn: During commissioning, the POINTS dis-play screen MODE will indicate "COMMISS."

If the Commissioning mode and the Damper/Transducer areboth set to Enable, the controller will first test and calibrate thedamper to verify the position feedback potentiometer is func-tioning and internally set the actuator full stroke time. A zerocalibration will also be performed on the pressure tmnsducel: Ifeither test frills, the CAL (Auto Calibration) output will be setto alarm. When the test is completed successfully, the controlwill reset the Damper/Transducer Cfdibrate input to Disable.

The control will then provide a method to set, verify and testthe cooling maximum and cooling minimum pressure limits.While in the Commissioning mode, if the Maximum Coolinginput is set to Enable, the controller will recover the configuredmaximum cooling pressure limit as configured, and display thevalue as the pressure set point. If incorrect, the balancer canenter the correct value in the pressure set point, and this vffluewill then be transfened back to the maximum cooling configu-ration limit. The control will then modulate the damper toachieve this set point and will display the resulting pressure asthe actuffl pressure. If the pressure is incorrect, the balancer canenter the correct value as the actual pressure and the controlwill store this value. Once completed, or if the Minimum Cool-ing input is set to Enable, the Maximum Cooling input is resetto Disable. If the Minimum Cooling input is set to Enable, the

process is repeated except the minimum cooling pressure limitis used. If a correction is necessary, the control calculates anoffset when the balancer entel_ the correct vfdue.

If the heat override input is set to Enable, the pressure ismodulated to the greater of the reheat airflow limit or the mini-mum cooling limit, and full heating is provided. Heating can beverified by the balancer through the Supply Air Temperaturedisplayed value. Heating will be controlled during the test toavoid exceeding the maximum duct temperature. The 45XCconfiguration data is displayed in Tables 8-21.

ABNORMAL CONDITIONS AND RESPONSES -- If thecontroller is unable to calibrate the open/close potentiometerreadings or zero cfdibrate the pressure transducer during thecommissioning function of &tmper/transducer calibration, anfdtum indication will be set using the CAL point. A CCN alarmmessage will also be generated. The ahum condition is clearedwhen cfflibmtion is successfully accomplished.

45XC Set-Up and Configuration

I. With the primary airflow disabled (AHU OFF), select theAir Balancing Maintenance screen (ZNAIRBAL) and setthe Commissioning Mode to ENABLE.

2. Set the Damper/Transducer Cal to ENABLE. Allow theprimary air &tmper to fully close. After the controllercalibrates the 0% open primary air damper position, thecontroller will fully open the dmnper and calibrate the100% open primary air damper position. The primaq air&tmper will fully close to the 0% position and thecontroller will zero calibrate the pressure tmnsducel:When the test is complete, the Damper/Transducer Calpoint will automatically revert back to DISABLE. Oncethis occurs, verify that the Auto-Calibration point fit thebottom of the screen reads 'NORMAL.' If so, the termi-nal has been calibrated successfully. Force the Commis-sioning Mode point to DISABLE, then AUTO, whichwill remove the 45XC terminal controller from the com-

missioning mode.

3. Select the Set Point table (SETPOINT) and configure thedesired Occ Heat set point, which should be set to thedesired space temperature value. If the system (primtuyair source) is shut down fit night during unoccupied timesand an accelerated morning cool down is desired, config-ure the Occ Cool set point between 3 and 4° F above theOcc Heat set point. If this cycle is not desired, set the OccCool set point to 99.

4. In the Set Point table, configure the Unocc Heat set pointand Unocc Cool set point to the same values as the occu-pied values unless a second space temperature set point isdesired.

NOTE: Setting the unoccupied space heating set pointlower than normal (below 70 F) consumes additionalenergy to maintain this lower temperature set point. Theunderfloor system is NOT designed for unoccupied oper-ation fit the terminals, but rather fit file primtuy air source(AHU or RTU) or through a field-installed zone &imperto disable primary airflow from the source to the 45XCmixing terminal. If a lower unoccupied heating set pointis required, configure the Unocc Heat set point to fliatlower value. The 45XC mixing terminal should be set tooccupied operation fit fill times to ensure maximum sys-tem efficiency. Again, if tin accelerated cool down transi-tion is desired, configure the Unocc Cool set point to avalue approximately 4° F above the Unocc Heat set point.When an accelerated cool down transition is not used, theUnocc Cool set point is configured to 99.

5. In the Service Config Table (PRESS), configure the CoolMinimum Plenum Pressure set point, which is used fornormal control.

51

6. If the Occ or Unocc Cool set points are used, configurethe Cool Maximum Plenum Pressure set point; otherwise,set this value equal to the Cool Minimum value. Tile CoolMaximum value is the controlling plenum plessure setpoint used when the space temperature equals or exceedsthe Cool set point. When the space temperature isbetween the heating and cooling set points, the plenumpressure is controlled to a line+u interpolation between thetwo pressure set points.

7. In the Service Config table (PRESS), configme the HeatMinimum Plenum Pressure set point. This is the plenumplessure set point used whenever the central stationequipment is in a heating mode, such as Morning WhrmUp (as detected by the primary air temperatme sensor).This value should be set lower than the Cool MinimumPlenum Pressme set point in order to reduce airflow tothis zone when the space temperatme has achieved the

8.

heating set point. This will prevent overheating of thespace.

NOTE: Only primary air, NOT return air. is used whenthe primtuy air source is operating in the heating mode.The terminal fan will only operate at minimum speed.The primary tdr damper will modulate as lequired tomaintain the desired heating plenum pressme set point.

Configure the Heat Maximum Plenum Pressure set point.The controlling plenum plessure set point is used duringmorning warm up, when the space temperature falls be-low the heating set point and the primary air source isproviding heated ail: The value is usually set equal to theCool Minimum Plenum Pressure set point in order towarm the space for occupancy and achieve the heating setpoint quickly.

Table 8 -- 45XC Controller Identification Table

TABLE NAMEDevice Name

DescriptionLocation

Software Part Number

Model Number

Serial Number

Reference Number

LEGEND

CID_UF -- Controller Identification -- Underfloor-- -- Blank Field

CONTROLLER ID

ClD_UFUnderfloor Controller

CESR131317-01

WWYYnnnnnn

Version 1.0

Table 9 -- 45XC Points Display Table

POINT DESCRIPTION RANGE ACCESS

MODE Terminal Mode (1) R

TYPE Terminal Type (2) R

CNTSP Controlling Set Point -40.0-245.0 R

SPT Space Temperature -40.0-245.0 R/WMVP Plenum Pressure 0.000-2.000 R/W

DMPPOS Damper Position 0-100 R

SAT Plenum Air Temperature -40.0-245.0 R/W

RH Relative Humidity 0.0-100.0 R/W

AQ Air Quality (ppm) 0-5000 R/W

PATEMP Primary Temperature -40-245 (3) R/WREMTCIN Unocc Override Off/On R/W

LEGENDR -- ReadRB/V -- Read/WriteUNDERFLR -- Underfloor

STATUS/UNITS

MODEUNDERFLR

XXX.X F

XXX.X F

X.XXX wgXXX% OPEN

XXX.X F

XXX.X%

XXXX

XXX F

Off

NOTES:1. Modes = OFF [0], HEAT [1], COOL [5], VENT [3], FAN & VENT

[4], DEHUMID [6], WARM-UP [2], REHEAT [7], PRESSURE [8],EVAC [9], ZEROCAL [10], COMMISS [11]

2. UNDERFLR is equivalent to CID PAR FAN Type and is fixed forthis application.

3. Used by Linkage Master Zone for Mode determination, if config-ured as a system and no air source is specified, otherwise sparetemperature sensor.

Table 10 -- 45XC Pressure Set Point Service Configuration Table

POINT DESCRIPTION STATUS/UNITS RANGE DEFAULT

COOLMIN Cool Minimum X.XX wg 0.00-2.00 0.06

COOLMAX Cool Maximum X.XX wg 0.00-2.00 0.08

HEATMIN Heat Minimum X.XX wg 0.00-2.00 0.04DB PCT Deadband XX.X% 7.5-20.0 12.5

HEATMAX Heat Maximum X.XX wg 0.00-2.00 0.08

52

POINTDAMPER PID

KpKi

Kd

STARTVAL

DMPDIRHEATING PID

KpKi

Kd

STARTVALMAXTEMP

SPTTRIM

SATTRIM

RMTCFG

LEGEND

SATSPTUNOCC -- Unoccupied

Table 11 -- 45XC Terminal Service Configuration Table

DESCRIPTION I STATUS/UNITSI RANGE

Proportional Gain

Integral GainDerivative Gain

Start Value

CW Rotation

Proportional Gain

Integral GainDerivative Gain

Start Value

Maximum TemperatureSPT Trim

SAT Trim

Unocc. Override Configuration (Close)

XXX.X

XXX.X

XXX.X

XXXX.X%

Close/Open

-100.0-100.0

-5.0-5.0

-20.0-20.0

0.0-100.0

0-1

-- Space Air Temperature-- Space Temperature

XXX.X

XXX.X

XXX.X

XXXX.X FXXX F

XXXX.X AF

XXXX.X AF

Open/Close

-100.0-100.0

-5.0-5.0

-20.0-20.0

40.0-125.0

40-200

-9.9-9.9

-9.9-9.9

0-1

Table 12 -- 45X0 Option Service Configuration Table

POINT DESCRIPTION

SCH Occupancy Schedule #GSM Global Schedule Master

OVR Override (Hours: Minutes)

SETT Set Point Group #GSTM Global Set Point Master

LIMT Maximum Offset Adjust

BROACK Broadcast Acknowledger

SENSOPT Sensor Options*

*0 = None, 1 = Humidity, 2 = IAQ.

STATUS/UNITS

XXX

No/Yes

XX:XX

XXXNo/Yes

XX.X AF

No/Yes

XXX

RANGE

64-99

0-1

00:00-24:00

0-16

0-1

0-15.0

0-1

0-2

DEFAULT

30.0

2.5

0.0

10.0

0 (Close)

4.0

0.5

0.0

65.0

90

0.0

0.0

1

DEFAULT

64

o (No)

00:00

0

0 (No)2.0

0 (No)

0

POINT

ROUTING

RETIMESPTHYS

UNOCCUPIED SPT

LOWLIM iHIGHLIMHIGHVP

OCCUPIED RH

LOWLIM iHIGHLIM

UNOCCUPIED RH

LOWLIM iHIGHLIM

AIR QUALITY

LOWLIM iHIGHLIM

Table 13 -- 45X0 Alarm Configuration Table (Type 10H)

DESCRIPTION

Alarm Routing ControlRe-alarm Time

SPT Occupied Hysteresis

High LimitLow Limit

High Plenum Pressure

High LimitLow Limit

High LimitLow Limit

High LimitLow Limit

STATUS/UNITS RANGE

XXXXXXXX 0-1 each posXXXX min 0-1440

XX.X ^F 1.0-100.0

DEFAULT

00000000

0 (disabled)5.0

XXX.X F I -40.0-245.0

XXX.X F I -40.0-245.0X.XXX wg 0.000-2.000

40.0

99.0

0.200

XXX.X% I 0.0-100.0XXX.X% 0.0-100.00.0

100.0

XXX.X% I 0.0-100.0XXX.X% 0.0-100.00.0

100.0

XXXX.X I 0.0-5000.0XXXX.X 0.0-5000.0

250.0

1200.0

53

Table 14 -- 45XC Linkage Configuration Table

PO'NT I DESCRIPTION I STATUS/UN'TS I RANGE I DEFAULTZONE LINKAGE

MZENA Linkage Master Zone No/Yes 0-1 0 (No)NSYSTZ Number of Zones XXX 1-239 1

ASBUSB Air Source Bus Number XXX 0-239 0

ASELEMN Air Source Element Number XXX 0-239 0

STATIC PRESSURE RESET

MINDP Reset Min Damper Position XX% 0-99 50

MAXDP Reset Max Damper Position XXX% 0-100 85

SPMAX Maximum Reset X.X wg 0.0-5.0 0.0SPRVAR SP Reset Variable Name XXXXXXXX* A-Z, 0-9, blank, -, --

CCN-LINKAGE DATA

CCNVAR CCN-Variable Name XXXXXXXX* A-Z, 0-9, blank, -, --

CCNFUNC CCN Function Configt X 0-3 3DATA RATE Data Transfer Rate XX min 1-15 10

CCNOUTP CCN Output Point XXXXXXXX* A-Z, 0-9, blank, -, --DESTBUSN Destination Bus Number XXX 0-239 0

DESTELEN Destination Element Number XXX 0-239 0

BRD RECV Sensor Mode X 1-3 11 = Local Sensor2 = Broadcast3 = Listen!

SENSCFG Listen Sensor Config X 1-2 11 = BPT2 = BPT & Offset

BRDDEVID Broadcasting Element Number XXX 1-239 1

*ASCII text.t0 = None

1 = Average2 = Low3 = High

Table 15 -- 45XC Set Point Table

DESCRIPTION POINT STATUS/UNITS RANGE DEFAULT

OHSP XXX.X F 40.0-90.0 72.0

Occ Heat OCSP XXX.X F 45.0-99.9 74.0Set Point UHSP XXX.X F 40.0-90.0 72.0

UCSP XXX.X F 45.0-99.9 90.0

LEGEND

OCC -- OccupiedOCSPOHSPUCSPUHSP

-- Occupied Cool Set Point-- Occupied High Set Point-- Unoccupied Cool Set Point-- Unoccupied High Set Point

Table 16 -- 45XC Zone Linkage Maintenance Table

POINT

ASBUSNUMASDEVADR

MZDEVADR

ASOPMODE

ASTEMPSTRTBIAS

AOHS

AOCS

AUHSAUCS

AZT

AOZT

CCCNVALOCCSTAT

NEXTOCCD

NEXTOCCT

NEXTUNODNEXTUNOT

PREVUNOD

PREVUNOT

MAXDMPOSPRESVAL

PRESDECR

PRESINCR

LEGEND

R -- ReadR/W -- Read/Write

DESCRIPTION STATUS/UNITS RANGE ACCESS

Air Source Bus Number XXX -- RAir Source Element Number XXX -- R

Master Zone Element Number XXX -- R

Operating Mode -- R

Air Source Supply Temp XXX.X F -- RStart Bias Time XXX min -- R

Average Occ Heat Set Point XXX.X F -- R

Average Occ Cool Set Point XXX.X F -- R

Average Unocc Heat Set Point XXX.X F -- R

Average Unocc Cool Set Point XXX.X F -- R

Average Zone Temp XXX,X F -- R

Average Occ Zone Temp XXX.X F -- R

Composite CCN Value XXX,X Ft -- R

Occupancy Status** X -- R

Next Occupied Day XXX -- R

Next Occupied Time XX:XX -- R

Next Unoccupied Day XXX -- R

Next Unoccupied Time XX:XX -- R

Previous Unoccupied Day XXX -- R

Previous Unoccupied Time XX:XX -- R

Maximum Damper Position XXXXX.X% 0.0-100.0 RAN

Static Press Reset X.X wg 0.0-5.0 RAN

Pressure Decrease Value X.XXX wg 0,000-5,000 RAN

Pressure Increase Value X.XXX wg 0,000-5,000 RAN

tNo units for this as this is varying in nature and depends on the CCN outputpoint name in config table.

*'1 =Occupied.

*Modes = OFF [1], COOLING [4], HEATING [3], FREECOOL [5], PRESSURE[6], EVAC [7].

54

POINT

ZONE OCCDAVCTL

LINKMAST

TIMOV

T56OFF

CCMRPPREF

HEATENA

HCMR

HSMR

TCACOOLFLAG

HEATFLAG

LEGENDR -- ReadR/W -- Read/Write

Table 17 -- 45XC Zone Maintenance Table


Occupied No/Yes R

Linkage Slave No/Yes R

Linkage Master No/Yes RTimed Override in Effect No/Yes R

Set Point Offset (T-56) XXX.X ^F -20.0-20.0 R/W

Cool Master Reference XXX.X F 45.0-99.9 R/W

Plenum Pressure Reference X.XXX wg 0-2.000 R/WFan Enable Ena/Disa R

Fan Master Reference XXX.X F 40.0-90.0 R/W

Plenum Temperature Reference XXX F 0-200 R/W

Temperature Control Airflow XXX% R

Cooling in Effect No/Yes R

Heating in Effect No/Yes R

POINT

CMODECALIBRAT

MAXCOOL

MINCOOL

HEATOVER

CONCFM

MVPSAT

CAL

LEGENDDIS/ENA -- Disable/EnableR -- ReadR/W -- Read/Write

Table 18 -- 45XC Air Balancing Maintenance Table


Commissioning Mode DIS/ENA 0-1 R/W

Damper/Transducer Cal DIS/ENA 0-1 R/W

Max Cooling Pressure DIS/ENA 0-1 R/W

Min Cooling Pressure DIS/ENA 0-1 R/W

Max Heating Pressure DIS/ENA 0-1 R/W

Pressure Set Point X.XX wg 0-2.00 R/W

Actual Plenum Pressure X.XXX wg 0.000-2.000 R/W

Supply Air Temperature XXX.X F -40.0-245.0 R/WAuto Calibration NORMAL/ALARM 0-1 R

POINT DEFAULT VALUE

MONTH 1

DAY 1

DURATION 0

Table 19- 45XC Holiday Configuration Tables

DESCRIPTION STATUS/UNITS RANGE

Start Month XX 1-12

Start Day XX 1-31Duration XXX 0-365

55

Table 20 -- 45X0 Time Schedule Configuration Table

POINTOVR

DOW1

OCC1

UNOCC1

DOW2

OCC2UNOCC2

DOW3

OCC3

UNOCC3

DOW4OCC4

UNOCC4

DOW5

OCC5

UNOCC5

DOW6

OCC6

UNOCC6

DOW7

OCC7UNOCC7

DOW8

OCC8

UNOCC8

LEGEND

DESCRIPTION STATUS/UNITS RANGE DEFAULTManual Override Hours X hours 0-4 0

Period 1: Day of Week XXXXXXXX 0/1 l's

Period 1: Occupied from XX:XX 0:00-24:00 0:00

Period 1 : Occupied to XX:XX 0:00-24:00 24:00

Period 2: Day of Week XXXXXXXX 0/1 0's


Period 2: Occupied to XX:XX 0:00-24:00 24:00







Period 5: Day of Week XXXXXXXX 0/1 O's












DOW# -- Period #: Day of WeekOCC# -- Period #: Occupied fromUNOCC# -- Period #: Occupied to

POINT

TIME SCHEDULE

MODE

PERIOD

OVERLASTOVERDURA

OCCSTART

UNSTART

NXTOCCDNXTOCCT

NXTUNOD

NXTUNOT

PRVUNOD

PRVUNOT

LEGEND

R -- Read

Table 21 -- 45X0 Time Schedule Maintenance

I DESCRIPTION I STATUS/UNITSI RANGE I ACCESS

Mode X 0-1 R

Current Occupied Period X R

Override in Progress No/Yes 0-4 ROverride Duration X Hours 0-4 R

Occupied Start Time XX:XX 0:00-24:00 R

Unoccupied Start Time XX:XX 0:00-24:00 R

Next Occupied Day X SUN-SAT, blank R

Next Occupied Time XX:XX 0:00-24:00 R

Next Unoccupied Day X SUN-SAT, blank R

Next Unoccupied Time XX:XX 0:00-24:00 R

Last Unoccupied Day X SUN-SAT, blank R

Last Unoccupied Time XX:XX 0:00-24:00 R

56

42KC Set-Up and Configuration

FAN, HEAT. AND COOL CONFIGURATION ANDTEST -- Reference Tables 22-28 to configure and test the fan,cool, and heat processes:

1. Display the Fan Coil Service Configuration screen tomake sure the Cool Type, Heat Type, fan speeds, andother options are configured.

2. Display the Points Display table. In most cases, the fanwill stall up in low speed due to the default settings. If thefan does not come on, forcing the fan output to ON usingthe Points Display table will cause the fan to run at lowspeed. Check to ensure the fan is running.

3. Refer to 42KC Fan Coil Airflow Adjustment and set bothSCRI and SCR2 to deliver the desired airflow. With thefan running at low speed, bring up the Fan Coil Mainte-nance scleen. Two points are available to change fanspeed to Medium or High. Change the speeds by forcingthe point. Make sure the fan runs at the correct speeds.Change the points back to AUTO after completing thetest.

4. Heating operation can be tested with the fan running inthe occupied mode by forcing the space temperaturepoint. Force the point to a value 5 ° F above the coolingset point to test the fan speed control and 2° F below theheating set point to test heating.

42KC Fan Coil Airflow AdjustmentI. Using a CCN service interface tool, st;u't the fan by plac-

ing the controller in the occupied mode. Adjust the occu-pied set points so that the cunent space temperature is atleast 5 ° F above the heating set point and at least 5° Fbelow the cooling set point (the satisfied Space Tempera-ture condition).

2. As noted on the Points Display table, verify that FanMode is displaying "LOW." Set SCRI to adjust thelowest airflow, which will be provided under conditionswhere the space tempemtme is satisfied.

3. From the Maintenance screen, force the Fan SpeedMedium point (FANSPDI) to ON. The fan will operate atmedium speed. Adjust SCR2 to provide the requiredairflow on medium speed.

4. From the Maintenance screen, force the Fan Speed Highpoint (FANSPD2) to ON. The fan will operate at highspeed. Thele is no adjustment for high speed fan opera-tion. The fan and motor will operate at full speed.

5. If high speed fan operation is not desired, then change thenumber of fan speeds (FANTYPE in the Service Con-figuration table) to 2. If electric heat is supplied, verifythat the airflow provided at the medium speed setting ofSCR 2 in step 2 above is sufficient to provide adequateairflow through the electric heatel:

For additional information on the 42KC controller (P/N33ZCFANCOL) and a full description of each value, defaultand range information, refer to the fan coil controller installa-tion, start-up and configuration instructions.

Setting Fan Airflow with ECM (ElectronicallyCommutated Motor) -- The 45XC seriesfan-poweredmixing boxes are equipped with ECMs and DO NOT requirebalancing. Fan speed is automatically adjusted to meet thetemperature and pressure set points for the underfloor plenum.The ECM is progrmnmed to provide a maximum airflow.depending on model and unit size. See Table 29 for airflowrange.

Balancing Underfloor Fan Terminals -- Carrier45UC underfloor fan terminal traits contain primary air damp-ers which, under the control of a volume controller, regulate theamount of primary air or plenum air (dependent on installation)distributed to the space.

The 45UC underfloor termin:ds dilect all return plenum airthrough the unit fan. The terminal is designed to operate withthe fan supplying airflow equal to or greater than the airflowsupplied by the primary air source. To balance the unit, itis necessary to first set the fan flow. then the VAV dmnper(primary) flow.

Each control option has specific procedures required forbalancing the unit, but some steps gue common to all terminalunits. The fan box adjustments described below must be madein conjunction with the adjustments described in the SpeedController and Set Points sections. The VAV damper airflowmay be set at the factory, but the fgm airflow must be set in thefield as described below. See Table 30.

Table 22 -- 42KC Points Display Table

POINT DESCRIPTION DEFAULT UNITS

MODE Desired Mode Fan Only

ALARM Equipment Status Alarm

CSPT Controlling Set Point 70.0 dF

SPT Controlling Temperature 72.0 dF

RAT Space Temperature 72.0 dF

SAT Supply Air Temperature 68.2 dFFANSTAT Fan Mode Low

CCAP Cooling Capacity 0.0 %

HCAP Heating Capacity 0.0 %FLTSTAT Filter Status Clean

CHGMODE Changeover Mode Heat

CONPUMP Condensate Pump OffREMOTE Remote Start Off

SFS Supply Fan Status On

AQ Air Quality (PPM) 0.0

RH Relative Humidity 0.0 %RH

OAT Outdoor Air Temperature 0.0 dFCCV1 Valve/DX 1 Off

CCV2 Valve/DX2 Off

HCV1 Heating 1 Off

HCV2 Heating 2 Off

DAMPER Damper Output Close

FAN Fan Output On

57

Table 23 -- 42K0 Unit with Modulating Hot WaterHeat Service Configuration Table

NAME t DESCRIPTION t DEFAULT tUNITSUNITTYPE 2-Pipe Changeover DisableFAN CONTROL

FANOPR t Fan Operation* t 1 tFANTYPE Number of Fan Speeds (1-3) 3FAN PID

KP Proportional Gain 50.0

KI Integral Gain O.OKD Derivative O.0

STA RTVAL Starting Value 1O0.O %

COOL TYP Cooling Typet OCOOLING PID


KI Integral Gain 0.3KD Derivative Gain O.O

STA RTVAL Starting Value 65.0 dFSTAGED COOLING

STAGES Number of Stages 1

TG1 Stage 1 Time Gard Enable

TG2 Stage 2 Time Gard Disable

CLT1 2-Pes Valve Logic Type Normal

CLT2 Stage 2 DX Logic Type Normal

HEAT TYP Heating Type** 1HEATING PID


KI Integral Gain 1.3KD Derivative Gain O.0

STA RTVAL Starting Value 80.0 dFHCROV Fan Off Value 55.0 dF

STAGED HEATING

sz o sI I IHLT1 2-Pos Valve Logic Type Normal

DMP 2-Position Damper NoAIR QUALITY

AOINLO O.0 Volts

AQINHI 10.0 Volts

AQLO O.0

AQHI 2000.0FILTIMR 15

CPTIMR 10 min

RATTRIM O.0 ^F

SATTRIM O.O ^F

AQ Low Voltage

AQ High VoltageAQ Low Reference (PPM)

AQ High Reference (PPM)Filter Timer hrs * 100

Condensate Pump Timer

Space Temp Trim

Supply Air Temp Trim

• 0=Auto, 1=Continuous.1-1=Meal, 2=2-Pos, 3=DX.•*1=Meal, 2=2 Pos, 3=Elec 4=2-Pipe Chg w/Elec Ht.

Table 24 -- 42K0 with 2 Position Hydronic Heat or1-Stage Electric Heat Service Configuration Table

NAME t DESCRIPTION ] DEFAULT t UNITSUNITTYPE 2-Pipe Changeover DisableFAN CONTROL

FANOPR I Fan Operation* I 1FANTYPE # Fan Speeds (1-3) 3FAN PID


KI Integral Gain O.0KD Derivative O.O

STARTVAL Starting Value 10O.O %

COOLTYP Cooling Typet OCOOLING PID


KI Integral Gain 0.3KD Derivative Gain 0.0

STARTVAL Starting Value 65.0 dFSTAGED COOLING




CLT1 2-Pes Valve Logic Type Normal


HEAT_TYP Heating Type **HEATING PID


KI Integral Gain O.OKD Derivative Gain O.O

STARTVAL Starting Value 105.0 dFHCROV Fan Off Value 55.0 dF

STAGED HEATING

STAGES I Number of Stages 1

HLT1 I 2-Pes Valve LogicType NormalDMP 2-Position Damper NoAIR QUALITY

AQINLO 0.0 Volts

AQINHI 10.0 Volts

AQLO 0.0

AOHI 2000.0

FILTIMR 15

CPTIMR 10 min

RATTRIM 0.0 ^F

SATTRIM 0.0 ^F

AQ Low Voltage




Space Temp Trim


•O=Auto, 1=Continuous.1-1=Med, 2=2-Pes, 3=DX.•*Enter Type 2 for two-position hot water/steam.

Enter Type 3 for 1 stage electric heat.

58

Table 25 -- 42KC with 2-Stage Electric HeatService Configuration Table

NAME t DESCRIPTION t DEFAULT t UNITSUNITTYPE 2-Pipe Changeover DisableFAN CONTROL

FANOPR I Fan Operation* I 1FANTYPE # Fan Speeds (1-3) 3FAN PID


KI Integral Gain 0.0KD Derivative 0.0

STARTVAL Starting Value 100.0 %

COOL TYP Cooling Typet 0COOLING PID



STARTVAL Starting Value 65.0 dFSTAGED COOLING




CLT1 2-Poe Valve Logic Type Normal


HEAT TYP Heating Type** 1HEATING PID



STARTVAL Starting Value 93.0 dFHCROV Fan Off Value 55.0 dF

STAGED HEATING

STAGES Number of Stages I 2

HLT1 2-Poe Valve Logic Type I NormalDMP 2-Position Damper NoAIR QUALITY

AQINLO 0.0 Volts

AQINHI 10.0 Volts

AQLO 0.0

AQHI 2000.0

FIL TIMR 15

CPTIMR 10 rain

RATTRIM 0.0 AF

SATTRIM 0.0 AF

AQ Low Voltage




Space Temp Trim


• 0=Auto, 1=Continuous.1-1=Mod, 2=2-Pos, 3=DX.•*l=Mod, 2=2 Pos, 3=Elec 4=2-Pipe Chg w/Elec Ht.

Table 26 -- 42KC Set Point Table

NAME I DESCRIPTION I VALUE I UNITSSETPOINTS

OHSP Occupied Low Setpoint 70.0 dF

OCSP Occupied High Setpoint 74.0 dF

UHSP Unoccupied Low Setpoint 55.0 dF

UCSP Unoccupied High Setpoint 90.0 dF

ORHH Occupied High Humidity 100.0 %RH

URHH Unoc High Humidity 100.0 %RH

Table 27 -- 42KC Fan Coil Maintenance Table

NAMEOCCSTAT

DAVCL

TIMOV

STRTBIAS

T56OFF

T57STATHCMR

HCSR

CCMR

CCSR

COOLFLAGHEATFLAG

REHTFLAG

FANPCT

FANSPD1

FANSPD2

CHGTEMP

CHANGOVR

DESCRIPTION VALUE UNITS

Occupied Yes

Linkage in Effect NoTimed Override in Effect No

Start Bias Time 0 rain

Setpoint Offset (%56) 0.0 FT57 Status 4

Heat Master Reference 70.0 dF

Heat Submaster Reference 150.0 dF

Cool Master Reference 74.0 dF

Cool Submaeter Reference 150.0 dF

Cooling in Effect No

Heating in Effect NoReheat in Effect No

Fan Speed 0 %

Fan Speed Medium Off

Fan Speed High Off

Changeover Temperature 95.3 dF

Changeover Status HeatLINKAGE THERMOSTAT

LINKSTAT

SUPE-ADRSUPE-BUS

BLOCKNUM

OCLOSTPT

OCHISTPT

UNLOSTPT

UNHISTPT

AZT

AOZT

OCCSTAT

Linkage Status 2

Supervisory Element 0

Supervisory Bus 0

Supervisory Block 0

Average Occ Heat Setpt 0.0 dF

Average Occ Cool Setpt 0.0 dF

Average Unoc Heat Setpt 0.0 dF

Average Unoc Cool Setpt 0.0 dF

Average Zone Temp 0.0 dF

Average Occ Zone Temp 0.0 dF

Occupancy Status (l=occ) 1

Table 28 -- 42KC Fan Coil Alarm ConfigurationTable

NAME I DESCRIPTION I VALUE I UNITSALARM CONTROL

ALRMCNT I Alarm Routing Control 11010000

REALARM I Realarm Time O minSPTHYS Control Temp Hysteresis 5.0 ^FSUPPLY AIR TEMPERATURE

LOWLIM I Low Limit 45.0 dF

HIGHLIM I High Limit 150.0 dFOCCUPIED RH

LOWLIM I Low Limit 30.0 %RH

HIGHLIM I High Limit 70.0 %RHUNOCCUPIED RH

LOWLIM I Low Limit 10.0 %RH

HIGHLIM I High Limit 90.0 %RHAIR QUALITY

LOWLIM I Low Limit 0.0

HIGHLIM I High Limit 1200.0

59

Table 29 -- 45XC Fan-Powered Zone Mixing Unit (ECM)

UNITSIZE

INLETSIZE

6

810

1210

1214

16

MOTORHP

1/2

ECM MOTOR AMPS120 V FLA*

9.5

18.0

240 V FLA* 277 V FLA

4.7 4.1

9.0 8.1

LEGEND

ECM -- Electronically Commutated MotorFLA -- Full Load Amps

PRIMARY AIRFLOW

Max Mint521 52

927 931448 145

2085 2081448 145

2085 2082838 284

3706 371

ECM FAN AIRFLOW**Max Min

1200 250

2500 400

MAXFLOW

1721

2127

2648

3285

3948

4585

5338

6206

*Special order.1-This value is based on a signal of 0.03 in. wg differential pressure

of the linear averaging flow probe. Minimum Primary flow may bezero.

**Rpm/torque controlled motor, at 0.1 in. wg static pressureunderfloor.

NOTE: Data is based on tests conducted in accordance with ARI(Air Conditioning and Refrigeration Institute) Standard 880-98.

Table 30 -- 45UC Underfloor Series Flow Fan Box (ECM)

UNIT INLET MOTOR MOTOR AMPSSIZE SIZE HP

120 V 208/240 V 277 V

3 9 1/3 4.1 -- 2.4

9 1/3 3.9 -- 2.3410 1/3 3.9 -- 2.3

LEGEND

ECM -- Electronically Commutated Motor

*Max based on 0.1 in. wg downstream static pressure.Min based on 0.6 in. wg downstream static pressure.

FAN AIRFLOW*

Max Min

1000 280

1050 360

1050 360

PRIMARYAIRFLOWt

Max Min**

900 203

900 203

1050 281

1-Maximum primary airflows are set b_

MINIMUMSTATIC PRESSURE

(in. wg)0.10

0.10

0.09

the maximum induced air-flow, which may vary as a function of downstream pressure.

**Some DDC controls supplied by others may have differentlimitations.

Speed Controller -- Each 45UC fan-powered air terlni-nal unit is equipped with a fan SCR speed controller located onthe bottoln of the control box. The SCR can be adjusted in thefield. (One SCR is located in the standard position at the bot-tom of the control box; the other is at the top of the controlbox.)

a default value of 0 is used for minimum setting at tile factory.Other settings of minimum and maximum primary airflow mustbe set in the field. Airflow (cfm) ranges for the primmy airdmnper and fans me shown in Table 30. The minimum primaryairflow (other than zero) is the minimum flow rote controllableby the unit volume controllel: The primmy air &unper can be setat zero for shutoff or at the minimum cfin listed.

The minimum stop on the speed controller is factory set atan internal minimum stop to prevent &tmage to the motol:Do not attelnpt to ovenide this minimum stop or electricaldmnage to the fan motor may result.

The fan airflow output is dependent on the setting of thecontroller and the downstream static resistance.

To increase the fan speed, turn the slotted adjustment on thecontroller clockwise toward the "HI" marking printed on thecontroller faceplate (see Fig. 56). To decrease the fan speed,turn the slotted adjustment on the controller clockwise towardthe "LO" marking (see Fig. 56).

Set Points

ADJUSTMENT OF SET POINTS -- Each 45UC undertloor

tenninzd unit, supplied with CCN controls, is equipped with anelectronic volume controller which regulates the quantity of coldprimary air entering the terminal and the conditioned space. Ifrequired airflow levels m-e specified with the job ordel; the mini-mum and maximum cfm levels will be set at the factory (whereapplicable). If minimum and maximum levels are not specified,

Fig. 56 -- 45UC Fan Speed Controller

6O

FIELD ADJUSTMENT OF MINIMUM AND MAXIMUMAIRFLOW SET POINTS -- Each 45UC underfloor terminalunit is equipped with a centerpoint averaging airflow sensor.which provides an amplified differential pressure that is pro-portional to the unit airflow. Output from this sensor is used toprovide a flow signed to both pneumatic and electronic con-trois. Unit airflow (cfln) can be read directly from the airflowsensor labels on the unit. See Fig. 57 and Table 30.

1. With the unit airflow from the fan set, turn on primal"/(VAV) air supply.

2. To set cfm in the field, connect a gage to the flow probe atthe provided 'T' taps, and check the differential pressure.

(Alternately, the toted flow may be measmed, and the pre-viously determined fan induction flow rate may besubtracted from the total flow to deterlnine VAV flow.Howevel: for low primary settings, this may not be asaccurate as the flow tap method.)

3. If a minimum VAV flow is required in heating mode,adjust the volume until the differenti_fl pressure corre-sponds to the cfm required.

4. Set the controller to provide maximum cooling demand.This is typically accomplished by first setting the thermo-stat to the lowest possible temperatme setting.

a. In most series fan boxes, the primary airflow rate isequal to the fan induction flow; in these cases,adjust the volume controller until a balance isachieved between fan-induced airflow and primaryairflow. When a balance exists, a strip of paperhung at the induction port should hang straightdown, and neither be blown in or out of the unit.

b. If the VAV airflow desired is less than the faninduction flow, adjust the volume controller untilthe differential pressure (measured through theflow probe as described above) corresponds to thecfm required. Verify that induction exists throughthe inlet ports, using the paper strips as describedabove. When induction exists, the paper stripshould be pulled into the unit.

5. Return _dl reheat options to normal connections.

6. Cap the 'T' taps.

7. Reset the thermostat to a norm_d setting.

NOTE: It is normal for the toted airflow to the room to increaseslightly in lull cooling mode.

Testing and Start-UpI. Place the 45XC controller in the Occupied mode. This

action may be completed through the occupancy scheduleor via the Occupancy Input point on the Point Displaytable.

2. Verify the required information was entered as specifiedin the 45XC Set-Up and Configuration section. Verify theprimary air source is operating in a Cooling mode. Adjustfile occupied heating set point to approximately 1° Fabove the current zone temperature and adjust the occu-pied cooling set point to the maximum value (99 F). Fromfile Points Display Table, verify the Terminal Mode(MODE) is HEAT.

3. Allow the system to operate grad determine the control-ling pressure set point. The controlling plenum pressureleference (PPREF) can be found in the ZNMAIN table.Note the pressure reference value. Monitor the fan enablepoint (HEATENA) and verify that the status changes toENA and the 'Heating in effect' flag is YES. Once thisoccurs, proceed to the plenum temperature referencepoint (HSMR) and FORCE this value to the design tem-perature that the system was selected for (approximately62 F). Proceed to the Points Display Table (POINTS) andverify that the Actual Plenum Pressure (MVP) is at ornear the noted reference and the plenum temperature is atthe desired value that was previously entered (forced). Ifthese values do not comply, the primary air &tmper(DMPPOS) should modulate to achieve this pressure setpoint while the fan speed will change to achieve thedesired plenum temperature.

NOTE: If the damper position is at 100% and the ActualPlenum Pressure is still below the desired pressure setpoint, either the terminal has insufficient capacity toachieve the desired pressure set point, excessive leakageis occuning from the plenum, or the fan is not operatingproperly.

O

€.0.EI--

_z

INLET AIRFLOW SENSOR

CFM at 1 in. wg SIGNAL

10

8

d

S

2

E

07

OS

/04

03 /

4O 5O

229 358 515 702 916 1160 1432 2062 2806 3665

#" I I / I f II I

/ V / ////I/

/I !//' !

¢/,///),I :., :

2

//j, tj:i , ,2

////!/lOO

7_011

9.7

8._

6.8

5.8

g46

z

3.4

2.e O

2.0

1.8

200 300

CFM

2000 3000 5000 70001"4

Fig. 57 -- Inlet Airflow Sensor Cfm vs Signal Chart

61

4. Verify that the fan can maintain the desired plenumpressure at minimum load conditions. Force the plenumtemperature reference point (HSMR) to the maximumdesign temperature that the system was selected for(approximately 65 to 67 F). Verify return air to the temri-nal is at least at this temperature or greatel: Allow suffi-cient time for the fan speed to increase. Verify that the pri-maU air dalnper closes, then connect a Magnehelic gageto the temrinal's primm-y airflow pickup probes. UsingFig. 57 (provided with the terminal), manually adjust theprimary air damper position to achieve the desired mini-mum primaU airflow for ventilation. From the PointsDisplay Table (POINTS), mad the actual dmnper position(DMPPOS) and configure the minimum primaU airdamper position (MIN_VENT) in Table 9.NOTE: [f the Actual Plenum Pressure is below the de-sired pressure set point, either the terminal has insuffi-cient fan capacity to achieve the desired pressure setpoint, excessive leakage is occurring from the plenum, orthe fan is not operating properly.

5. While the Magnehelic gage is still connected, manuallyopen the primtu-yair damper in order to achieve the maxi-mum rated box prim_u'y airflow. Set the prima U airdamper actuator's mechanical stop so that the &mpercannot exceed this position.

6. When completed, remove all forces previously appliedfor testing purposes.

45XC Operation--As the space temperature variesaround the space temperature set point, the fan speed iscontrolled to regulate the amount of return air allowed into theplenum, which in turn, file return air (hot) quantity is vmied.The primary damper then adjusts to reduce the supply air(cold) in order to maintain a constant pressure in the duct.Underlloor plenum pressure is maintained at set point, whichsupplies air to the space through diffusers. The space air willheat up and hot air will reach the ceiling plenum. Severalfactors contribute to the heating of the space air: the occu-pancy, lighting loads, perimeter heating, mechanical heating byindependent underfloor controller, etc. [t is the job of the fan tointroduce the proper proportion of ceiling plenum air to thesupply air to maintain the space temperature at the configuredheating set point.

These variable speed, parallel fan-powered terminals tuedesigned to provide constant flow pressure and temperaturecontrol for a sealed undertloor plenum. These temrinals tueprimarily used for plenums serving a single interior zone,where a combination of primm-yair mixed with mcirculated airprovides proper plenum pressure, temperature and ventilation.They may also be used in conjunction with a separate perime-ter heating system to condition exterior zones. A typicalapplication is shown in Fig. 1. Design load requirements andterminal fan capacity govern terminal selection and sizing. Thecontrol can provide variable air volume (VAV) control of theprimary air during both cooling and heating. The fan providesplenum temperature control by varying the amount of recircu-lated air introduced into the plenum, while the primmy airdmnper simultaneously maintains the plenum pressure bycontrolling the amount of primary air introduced into theplenum. As the zone's cooling load decreases, the fan speedincreases, which increases the amount of mcirculated air drownin fiom the ceiling plenum. Simultaneously. the amount ofprimaU air is reduced to maintain a constant dischargepressure. A wall-mounted space temperature (SPT) sensorlocated in the zone will sense load requirements. The terminalfan will operate whenever the primaU air source is operating.FOR 45XC UNITS WITH CONTROL PACKAGE 4840

System Start-Up -- Cooling (Refer to Numbers in Fig. 58)1. Points 1 and 2 indicate that maximum cooling airflow is

established by the use>defined maximum cooling ple-num pressure set point until the zone comes under control

at 2 (this may be the stone value as the minimum coolingpressure set point). The fan operates at minimum speed.

2. Beginning at 2, the plenum pressure is reduced by reduc-ing the primm-y airflow until the minimum coolingplenum pressure set point is reached at 3.

Normal Operation -- Cooling (Refer to Numbers in Fig. 58)

1. Point 3 indicates that the zone temperature is above thecontrol (beating) set point, the plenum pressure ismaintained at the use>defined minimum cooling plenumpressure set point.

2. At point 4, as the zone temperature decreases, the plenumtemperature is increased by increasing the fan speed tointroduce more recirculated air while simultaneouslyreducing the primary airflow. The plenum pressureremains constant at the use>defined minimum coolingplenum pressure set point.

3. As indicated by points 4 and 5, should the zone tempera-ture continue to fall below the occupied control set point,the primary air damper will close but not below the use>defined minimum ventilation set point at point 5 (may beset to zero), while the fan provides recirculated air tomaintain the plenum pressure set point.

Heating (When the PrimaLy Air Source is Providing HeatedAir. Refer to Numbers in Fig. 59)

1. Upon receiving a beating signal generated by the airsource equipped with CCN controls (or a primary airtemperature sensor is installed to detect that the air sourceis heating), the heating mode is automatically in effect.

2. If the zone temperature is above the occupied heating setpoint, the primary air damper is modulated to maintainthe minimum heating plenum pressure set point at 4 ll-lb.The fan operates at minimum speed.

3. Should the zone temperature fall, the plenum pressurewill increase up to the user-defined maximum heatingplenum pressure set point at 5 ft-lb. The control may beconfigured to provide constant volume heating to providea constant supply of heated air to the zone.

Morning Wtum-Up (If Configured to Provide Variable VolumeHeating. Refer to Numbel.s in Fig. 59) -- Upon receiving amorning warm-up signal generated by the air source equippedwith CCN controls, the primary air damper will modulate tomaintain the maximum beating plenum pressure set point if thezone temperature is below the occupied heating set point at5 ft-lb. This allows a maximum quantity of wmm primary air tobe delivered to the zone. As the zone's temperature rises, theplenum pressure is reduced to the minimum heating plenumpressure 4 ll-lb. The terminal fan operates at minimum speed.

Cooling -- Unoccupied Time Period (Optional) -- When theunoccupied period is reached, the use>defined occupied cool-ing set point can be reset upw_ud to a use>defined unoccupiedcooling set point. If the primary air source is operating, theprimary air damper will throttle in the same manner (see Sys-tem Start-Up -- Cooling and Normal Operation -- Cooling)during the unoccupied period, using the zone's unoccupiedcooling set point.

Heating -- Unoccupied Time Period (Optional) -- When theunoccupied period is reached, the use>defined occupied heat-ing set point can be reset downward to a use>defined unoccu-pied heating set point. If the primary air source is operating, theprimary tfir damper will operate in the same manner (see Heat-ing) during the unoccupied period, using the zone's unoccupiedheating set point.

Demand Controlled Ventilation Sensor (Optional) -- Thecontrol provides tin input for a ventilation sensor (CO2) that canbe used to monitor the ventilation provided to the zone. Thesensor value can also be used by a CCN system in order tomodulate the mixed-air damper on tile primary air sourceequipment and provide demand controlled ventilation.

62

Damper Ovemde -- The damper ovemde function is ener-gized through file use of a field-supplied smoke control panelconnected to the air source equipped with CCN controls. Thesmoke control panel and installation must be in accordancewifll UL864 and local codes. The damper override functionoverrides the airflow setting used by the logic. It will cause theterminal to provide the configured maximum cooling plenumpressure when the air source is in file Pressurization mode, findfully close the primary air &lmper when the air source is in the

evacuation mode, The terminal fan is disabled only after the

pfimfu'y fdr is off.

If the PrimaL-y Air Soume Shuts Off -- Tile primary air

&tmper will fully close and file control will recalibrate the

plenum pressure transducer. If the primary air soume remains

off (no primary air), file &lmper will be mpositioned to at least

50% open to ffllow the air soume to restart properly.

Plenum Pressure

(Maximum Cooling)

Maximum Fan Airflow

Plenum Pressure

(Minimum Cooling)

Minimum Ventilation

Minimum Fan Airflow

5

/'

/

5

PLENUM PRESSURE

............................... //i I

4i[_1 ...............

PLENUM TEMPERATURE'........................................................q99!............................................................................................................................................

4 FAN

I

LEGEND

Air Source Supplying Heated AirAir Source Supplying Cooled Air

OCCUPIED OCCUPIEDCONTROLSETPOINT COOLING

SETPOINTHEATING &

MORNING WARM-UP

Fig. 58 -- Sequence of Operation -- Equipment Cooling Mode (Control Package 4840)

Plenum Pressure

(Maximum Heating)

Maximum Heating Airflow

Minimum Heating Airflow

Plenum Pressure

(Minimum Heating)

Minimum Fan Airflow

5' _ i PLENUM TEMPERATURE

.......................... \,\

Warm \

I" i

I '\ t{ \", t PRIMARY AIRFLOW

i V-................................r..............................I1 1 PLENUMPRESSUREI 1I t FANI t

OCCUPIEDCONTROL SETPOINT

HEATING &MORNING WARM-UP

OCCUPIEDCOOLINGSETPOINT

LEGEND


Fig. 59 -- Sequence of Operation -- Equipment Heating Mode (Control Package 4840)

63

FOR 45XC UNITS WITH CONTROL PACKAGE 4841

System Start-Up -- Cooling (Refer to Numbers in Fig. 60)-- Points 1-4 indicate that maximum cooling airflow is provid-ed by primary air until the zone comes under control fit 4. Thefan operates fit minimum speed.

Normal Operation -- Cooling (Refer to Numbers in Fig. 60)

1. Points 1-3 indicate that if the zone temperature is abovethe control (heating) set point (typically 70 F), file termi-nal's 55 F primary airflow from file air source is maxi-mized to provide cold air to the plenum and cool thespace. The fan is fit minimum airflow find the totalvolume of air is maintained fit the required constantairflow set point.

2. At point 4, as the zone temperature di'ops closer to theoccupied heating set point, the dischmge air temperaturefrom the terminal into the plenum is increased by increas-ing the fan speed to introduce more recirculated ffir whilesimultaneously the primary airflow is reduced to maintainthe total airflow into the access plenum. As indicated bypoints 4 and 5. should the zone temperature continue tofall, the primary air dmnper will close but not below theuser defined minimum ventilation set point fit 5 (may beset to zero), while the fan provides recirculated air fiomthe return plenum, to maintain constant airflow into theunderfloor plenum.

Heating (When the Primary Air Source [AHU1 is ProvidingHeated Air. Fig. 61 ) -- Upon receiving a heating signal gen-erated by the air source equipped with CCN controls (or aprimmy air temperature sensor is installed to detect that the airsource is heating), the heating mode is automaticfdly in effectand the primary air &lmper is modulated to maintain constantairflow into the plenum. The fan operates fit minimum speed.

Unoccupied Time Period (Optional) --When an unoccupiedperiod is leached, the user-defined occupied control set point(heating set point) can be reset upward to a user definedunoccupied set point to minimize the use of primary air duringunoccupied periods. If the primary air source is operating,the primmy air dalnper will close find the fan will maintainthe desiled airflow into the plenum. The control operates in thesame manner (see Nomml Operation -- Cooling) during theunoccupied period, using the zone's higher unoccupied controlset point.

NOTE: In common plenum applications, unoccupied control isnot lecommended unless fdl terminals use file exact same timeschedule and set points):

Demand Controlled Ventilation Sensor (Optional) -- The con-trol provides an input for a ventilation sensor (CO2) that can beused to monitor the ventilation provided to the zone. The sen-sor value can also be used by a CCN system in order tomodulate the mixed air damper on the primary air sourceequipment find provide demand controlled ventilation.

Damper Override -- The damper override function is ener-gized through file use of a field-supplied smoke control panelconnected to the air source equipped with CCN controls. Thesmoke control panel and installation must be in accordancewith UL864 and local codes. The damper override functionoverrides the primary airflow setting used by the logic. It willc_mse the terminal to provide the configured maximum airflowinto the plenum when the air source is in the Pressurizationmode, and fully close the primary air &lmper when the airsource is in the Evacuation mode. The temiinal fan is disabled

only if the primary air is off.

Primary Air Source Shuts Off

1. The primary air dmnper will fully close and the controlwill recalibrate the plenum pressure tmnsducel:

2. If the primary air source remains off (no primary air), thedamper will be lepositioned to fit least 50% open to allowthe air source to restart properly.

Calibration of Airflow Sensors -- In a common plenumapplication with multiple terminals, all primary air sourcessupplying primary air to terminals feeding the commonplenum must operate on the exact same schedule and musttransition to "Off" fit the same time fit least once each day for25 minutes to allow fdl airflow (pressure) transducers torecalibrate properly. Considering the amount of time requiredfor recalibration, it is suggested that the recalibmtion periodtake place during the unoccupied period, if one exists. Sequen-tially, each primary air damper will lully close and each controlwill lecalibrate its pressure transducel:

64

ResuJt[ng 08Plenum Pressure

"lk,picaJ Plenum

Pressure Sevpoint

Maximum Fall Airflo_

MiMmtm_ I_'imarv Airttow06

Wndlation

I I

"l_pical 68 ° - 69 '>F 69 ° - 70" F

"I'cnlperamre

24 3 1

Maximum PrhnargAirflow, ir

!',] /

;,_ Total Supply Airflow to Plenum

5_ 4 Mininmm Fan Airflow Fan

II I I I I

?0 ° - 71 ° F 71 ° - 72 ° F ¸ 72 ° - 73" F 73 ° - 74 ° F 74 ° - 75" F

OCCUPIED

CONTROL SETPOINT

(70 _)(CONFIGURED ItEXFING)

LEGEND


I75 _' - 76' F

Fig. 60 -- Sequence of Operation -- Equipment Cooling Mode (Control Package 4841)

Plenum Pressure

(Maximum Heating)

Maximum Heating Airflow

Minimum Heating Airflow

Plenum Pressure

(Minimum Heating)

Minimum Fan Airflow

OCCUPIEDCONTROL SETPOINT

HEATING &MORNING WARM-UP

OCCUPIEDCOOLINGSETPOINT

LEGEND


Fig. 61 -- Sequence of Operation -- Equipment Heating Mode (Control Package 4841)

65

42KC Fan Coil Sequence

CONTROL MODES -- The control operating mode is deter-mined based upon the fan coil's mechanic:d configuration(heating coil type) and optional features, such as the T57 spacetemperature sensor's fan speed switch selection. The fan willNOT operate and file mode will remain OFF if the T57's fanspeed selection is in the OFF position. Otherwise, the controlwill determine the operating mode as defined below.

Morning Start -- Warm-up -- If the space temperature is be-low the Occupied Heating Set Point, the unit will operated inthe "Occupied Heating Mode" as described below.

Morning Start -- Cooling -- If the space temperature isabove the Occupied Cooling Set Point, the unit will operated inthe "Occupied Cooling Mode" as described below.

Occupied Heating Mode-- Water/Steam -- If the spacetemperature falls below the heating set point, the water valvewill modulate (open for two position control valves) as re-quired to maintain file heating set point. The valve is controlledto prevent file dischtuge air temperature from rising above140 F at any time. During heating, if the fan has not been man-ually set (T57 only) to operate at a desired fixed speed, the fanwill operate at the lowest speed necessa U to meet the spaceload conditions in order to minimize fan noise. If the load in-

creases, file fan speed will increase. When the load decreasesand the space temperature rises, the fan speed is reduced. If thespace temperature rises above the heating set point, file heatingv:dve is closed.

Occupied Heating Mode-- Electric Heat -- If the spacetemperature ftdls below the heating set point, the electric heaterstages are controlled to maintain the space temperature at thedesired heating set point. During heating, if the fan speed hasnot been manu_dly selected (T57 only) to operate at a desiredspeed, the fan will operate at the lowest speed necessmy tomeet the space load conditions, to minimize fan noise. If thesupply air temperature should rise above 130 F while electricheat is operating, the fan speed is antomatically incleased(except if manually overridden from a T57 sensor). The fanwill maintain high speed until _dl stages of electric heat havebeen disabled or the supply air temperature diops below 100 EIf the supply air temperature continues to increase above 140 F.the heater stages are deenergized. To protect against shortcycling, the first heater stage is prevented from being restmtedfor a 5-minute period after being deenergized. If the space tem-perature rises above the heating set point, all heating stages aredisabled.

Unoccupied Heating Mode -- The fan will be energized andthe heat will be activated when the space temperature falls 1° Fbelow the unoccupied heating set point. The heat is controlledin order to prevent the supply air temperature from rising above140 F at any time. The fan will operate at low speed unless thelow speed is unable to raise the space temperature to the unoc-cupied heating set point. The fan will be deenergized and theheat disabled when the space temperature rises above the unoc-cupied heating set point.

Occupied Cooling Mode -- If the space temperature risesabove the cooling set point and the fan has not been manuallyset (T57 only) to operate at a desired speed, the fan will operat-ed at the lowest speed necessary to meet the space load condi-tions in order to minimize fan and air noise. As the space loadincreases, the fan speed will increase to deliver more air fromthe underfloor plenum to the diffusers to balance the load as le-quired. When the load decreases and the space temperaturefalls, the fan speed is reduced.

Unoccupied Cooling Mode -- All cooling is provided by thecooled air in the underfloor plenum. No unoccupied cooling isprovided. Unoccupied cooling should be disabled by settingthe unoccupied cooling set point to the maximum value of99 E

Unoccupied Fan Cycling -- If unoccupied fan cycling hasbeen selected, the fan will start once an hour and operate for1 minute to circulate the air in the space in order to avoid airstagnation and provide more accurate space temperature sens-ing. The actual start time for each unit will be determined byits address.

45XC Application ConsiderationsI. The 45XC fan-powered mixing box is used to mix prima-

ry air with ceiling plenum return air and deliver that airinto an underfloor plenum supply distribution system.The 45XC mixing box mainttfins plenum pressure andtemperature in order to meet the load requirements of thespace. The pressure is maintained at set point by modulat-ing the primary air dmnper to increase or decrease theflow of primmy air into the underfloor plenum. This caus-es the resulting pressure to increase as the airflowincreases or decrease as the airflow decreases. To main-tain the proper plenum temperature, the partfllel fan isused to modulate the flow of return air from the ceilingplenum into the plenum. This return airflow is a parallelairflow path to the primmy airflow so the two worktogether, but oppositely, in order to maintt_in plenumpressure. For exmnple, as the c_dculated plenum tempera-ture set point increases due to a load decrease in thespace, the parallel terminal fan increases its speed in orderto introduce more return air into the plenum. This causesthe plenum pressure to increase, therefore, the primary airdamper closes to reduce the plenum pressure to coincidewith the configured plenum pressure set point.

IMPORTANT: The terminal fan must be capable of sup-plying enough return air to mainttfin the configured plenumpressure set point. If the fan is not able to supply enoughleturn air, additional primary air will be used to maintainthe plenum pressure set point, resulting in a plenumtemperature that is colder than required, which will over-cool the space.

2.

The terminal fan capacity and primtu'y air &unper sizemust both be accurately selected to achieve the completerange of plenum temperatures required, from the minimumplenum temperatme at design space load to the maximumplenum temperature at minimum space load. The actu:dterminal capacity must meet or exceed the required plenumairflow over the lhll range of plenum temperatures. Referto the 45X Underfloor Air Capacity CMculatorprognml on the commerckd mmketing webpage(www.hvacpartnel_.com). To get to the calculator, selectCarrier Commercial Mm'keting--_Pmducts--_Ail_ide Pmd-ucts---_Air Terminals. Choose "45X" under the "Air Termi-nal Model" column, then "Documents trod Downloads."The c_dculator is found in the Miscellaneous section.

The 45X Underfloor Air Capacity Calculator usesspecific input conditions for ceiling plenum temperatureand primary air temperature to confirm that the airflowspecified by the design engineers is available at therequired underfloor plenum temperature.

The space temperature control set point for the 45XCunderfloor system is ALWAYS the configured heating setpoint. This is the set point that the fan and primary airdamper will mtfintain. During occupied periods, the occu-pied heating set point is used. The occupied cooling setpoint is only used to increase the plenum pressure andspeed the space temperature recovery from an overtem-pemture condition caused by the space transitioning fromunoccupied to occupied. The occupied cooling set pointis NOT a temperature control set point, but rather the setpoint at which the control uses the maximum coolingpressme set point to increase airflow to the space. Itshould only be used if additional noise is acceptable in

66

orderto expeditethespacetemperaturerecovery.Thefeaturemaybedisabledbysettingthemaximumcoolingplenumpressuresetpointto thesamevalueastheminimumcoolingpressuresetpoint,or bysettingtheoccupiedspacetemperaturesetpointto themaximumv_due.

3. The45XCunderfloorcontrolis alsoequippedwithunoccupiedtemperaturesetpoints.Howevel:theydonotfunctionastypicalunoccupiedsetpointcontrols.Theundertloorcontrolalwaysmaintainsfileheatingsetpoint,thereforewhentmnsitioningtounoccupiedoperation,theunoccupiedheatingsetpointisused.If thissetpointislowerthanthecurrentspacetemperature,thefanreturnairflowwilldecreaseandprimmyairflowwillincreasetolowertheplenumtemperatureandsatisfytheunoccupiedheatingspacetemperatmesetpointwhilemtdnttdningtheplenumpressuresetpoint.Thiscausesenergyconsump-tiontoincrease.Conversely,iftheunoccupiedheatingsetpointisraised,theprimmyairwillbereducedwhilethefanspeedwill increaseinanattempttowarmthespace.Therefore,if areductionin primaryairflowisdesiredduringunoccupiedperiods,thentheunoccupiedheatingsetpointmustbeincreasedto thedesiredunoccupiedspacetemperaturesetpointandtheunoccupiedcoolingsetpointmustbesettomaximum.Amoreeffectivewaytoreduceenergyconsumptiondur-ingunoccupiedperiodsistodisabletheprimaryairflowtotheundertloorterminalsviaa field-supplieddamperinstalledin thebranchductsupplyingtheundertloorterminalsor shuttingdowntheprimmyair sourcefan.Thiswilleliminateboththeprimaryairconsumptionandwillcausetheunderfloorterminalfantoshutdownaswell.Unlesstwodifferenttemperaturecontrolsetpointsaredesired,theunoccupiedsetpointshouldbesetto thesamevaluesastheoccupiedsetpoints.Underlloorcontrollersshouldhaveoccupancyscheduledfor24hoursaday.7daysaweek(alwaysoccupied).

4. TheCarrierControlPackage4840isanunderfloorple-numpressurecontrolpackagethatshouldonlybeusedwhenoneortwo45XCterminaldischargesintotinisolat-edor subdividedunderfloorplenum(see45XCFanSpeedandTemperatureControl-- For45XCUnitsWithControl Package 4840). When the plenum airflow re-quirements exceed the capability of two 45XC terminals,the 45XC terminals must be installed with a field-sup-plied velocity probe as shown in the Carrier ControlPackage 4841 (see 45XC Fan Speed and TemperatureControl -- For 45XC Units With Control Package 4841 ).This is done when multiple terminals are used to pressur-ize a common plenum. In this case, generally 70 to 80%of the total plenum airtlow is controlled using the 4841control package and 20 to 30% of the terminal airflowinto the plenum is controlled using the 4840 package. The4841 control package ensures that the common plenum issupplied evenly and that the airflow capability of a singleterminal is not exceeded. Plenum pressure control ismaintained by the termimd(s) using the 4840 controlpackage.

NOTE: If the common plenum is large and more than one4840 terminal is used, these should be located appropri-ately to ensure proper pressure control and to minimizeinteraction between the terminals.

The 45XC underfloor plenum control systems require theprimary air source to be shut down in order to recalibratethe pressure transducers. These systems operate at ex-tremely low pressures and must be rec_dibrated to provideaccurate pressure and flow control. It is recommendedthat the primmy airflow be shut down every 24 hours for

at least 30 minutes to allow rec¢flibration. When 45XC

underfloor terminals are fed primary air from a commonprimary air system that cannot be shut down, a two-position branch damper MUST be installed to ensure thetdr can be closed off to the underfloor terminals for

recalibration. This &lmper should be controlled to shutoff the primary air to all undertloor terminals onceevery 24 hours, for 30 minutes, to _fllow recalibration.Additionally, if multiple 45XC terminals supply a com-mon underfloor plenum, then the primary tdr must be shutoff to these terminals simultaneously. Failure to provide a30-minute recalibration period will lesult in incorrectlycalibrated plessure transducers and a plenum pressmevalue at or nero zero, eventually leading to a failure tocalibrate transducer alarm.

Maintenance

MOTOR TROUBLESHOOTING -- Tile PSC motors meequipped with long-life sleeve bearings with non-detergentSAE (Society of Automotive Engineers) 20 oil. Do not add oilto motors.

The ECM motor has permanently lubricated ball bearingsthat require no mtfintenance.

The ECM motol_ are 277 v, single phase only and use aquick-connect type plug between the power source and themotoc No alternate wiring options are available.

To Check Wiring -- The PSC motor is connected by quick-connect termimds to the capacitor (brown wire), the housingwire (green ground wire), and the control box (black wire andwhite wire). Veril_ that the fan motor wiring is correct asshown in Fig. 62-64.

To remove the fan motor and wheel:

1. Disconnect wiring at the quick-connect termimds locatedon the motor and the bell. Note connections.

2. The fan motor and wheel assembly is attached to thedischarge panel with 4 hex nuts.

3. Remove the motor by removing the 3 screws that attachfl_e torsion flex mounts to the inlet ring.

4. Remove wheel by unscrewing the hub set screws that areaccessed through file open end of the wheel.

Refer to the fan motor wiring details shown on the wiringdiagrmn attached to the unit.

Failure to reconnect the fan properly can cause dmnage tothe motor and/or serious personal injury.

FAN MOTOR MAINTENANCE --Unit motors tue equippedwith permanently lubricated bemings. Inspect fan and motorassembly accumulation of dust and dirt as required by operatingenvironment. Clean as necesstuy.

If fan motor does not ran:

1. Make sure that there is free rotation of blower wheel.

2. Remove fan packing.

3. Verifij that there is no fieight or installation &tmage.

4. Check for proper unit powec

5. Disconnects should be on, and check optional fusing.

6. Check for proper control sigmd, pie switch setting, properair control 24 vac at fan contactor, and that the coil isenergized.

If fan motor runs with excessive noise:

1. Make sure the blower, and all components have no clear-ance problems and are securely attached.

67

2. Verify the integrity of ductwork, make sum there me noleaks or loose connections rattling diffuset.'s or balancingdampers.

3. Confirl*a that the maximum cfni is not too high, or thatdischarge static pressure is not too low.

If fan motor tuns with insufficient aiNow:

1. Check for ductwork restrictions, ditty air flters, andclogged water coils.

2. Re-adjust fan speed control.

3. Discharge static pressure too high.

If repair or replacement is mquited:1. Motor and fan should be removed as an assembly.

Disconnect all power before servicing.

2. Remove the four hex nuts from the mounting lugs hold-ing the fan assembly to the discharge panel, and lower theassembly.

NOTE: Do not allow assembly to hang from wiring.

3. Ix_osen the setscrew if removing motor from blowet:

1sBrown tot__rCap acitor

Btack #12

(_) _ /_White #12 to

S co _ Terminal Block /

Disconnect Switch

_ BlcCRkc#_2t[°lter

Crimp tie Wire 1and Wire 4

q Green II

Fig. 62 -- PSC Motor Wiring Terminal Block --"I'15 V, Single Phase

n-O

0

Brown to

Capacitor

_o White #12 to

-- ,/-Terminal Block /m ----Disconnect Switch

co _]_"_Btack #12

c,l

_Black #12 to

SCR Controller

GreentllFig. 63 -- PSC Motor Wiring Terminal Block --

208/240 V, Single Phase

-- _/--Brown to_ _j_ Capacitor

White #12 to

,_ ,/-Terminal Block /_o _ Disconnect Switch

¢Y' _olO _ _Black #12

Oc_I Black #12 to

SCR Controller

_[ Green t I I

Fig. 64 -- PSC Motor Wiring Terminal Block --277 V, Single Phase

Copyright 2005 Carrier Corporation

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Catalog No. 04-53450001-01 Printed in U.S.A. Form 45-4Sl Pg 68 11-05 Replaces: 45-2SI