Installation Instructions

NOTE: Read the entire instruction manual before startingthe installation

TABLE OF CONTENTS

SAFETY CONSIDERATIONS .................... 2

Rated Indoor Airflow .......................... 3

INSTALLATION ............................... 5

Jobsite Survey ................................ 6

Step 1 - Plan for Unit Location .................. 6

Roof Mount ............................... 6

Step 2 - Plan for Sequence of Unit Installation ...... 7

Curb-Mount Installation ..................... 7

Pad-Mount Installation ...................... 7

Frame-Mount Installation .................... 7

Step 3 - Inspect Unit ........................... 7

Step 4 - Provide Unit Support ................... 7

Roof Curb Mount .......................... 7

Slab Mount (Horizontal Units Only) ........... 7

Alternate Unit Support

(In Lieu of Curb or Slab Mount) .............. 7

Step 5 - Field Fabricate Ductwork ................ 9

For Units with Accessory Electric Heaters ...... 9

Step 6 - Rig and Place Unit ..................... 9

Positioning on Curb ....................... 10

Step 7 - Convert to Horizontal and ConnectDuctwork ........................... 10

Step 8 - Install Outside Air Hood ............... 11

Economizer and Two Position Damper Hood

Package Removal and Setup -- Factory Option .. 11

Economizer Hood and Two-Position Hood ..... 11

Step 9 - Install External Condensate Trapand Line ............................ 12

Step 10 - Make Electrical Connections ........... 12

Field Power Supply ........................ 12

Units with Factory-InstalledNon-Fused Disconnect ..................... 13

Units without Factory-InstalledNon-Fused Disconnect ..................... 14

All Units ................................ 14

Convenience Outlets ....................... 14

Factory-Option Thru-Base Connections ...... 16

Units without Thru-Base Connections ......... 16

Field Control Wiring ....................... 16

Thermostat ............................... 16

Unit without Thru-Base Connection Kit ....... 17

Heat Anticipator Settings ................... 17

Electric Heaters ............................ 17

Single Point Boxes & Supplementary Fuses .... 18

Single Point Boxes without Fuses ............ 18

Low-Voltage Control Connections ............ 18

Humidi-MiZer <n_Control Connections .......... 19

Humidi-MiZer - Space RH Controller ........ 19

EconoMiSer X (Factory-Installed Option) ....... 19

PremierLink TM(Factory Option) ............... 21

Supply Air Temperature (SAT) Sensor ......... 24

Outdoor Air Temperature (OAT) Sensor ....... 24

EconoMi$er2 ............................. 24

Field Connections .......................... 24

Space Sensors ............................ 26

Connect Thermostat ....................... 26

Configure the Unit for Thermostat Mode ...... 26

Economizer Controls ........................ 27

Indoor Air Quality (CO2 sensor) ............. 27

Outdoor Air Quality Sensor ................. 27

Space Relative Humidity Sensor orHumidistat Connections .................... 28

Smoke Detector/Fire Shutdown (FSD) ......... 28

Filter Status Switch ........................ 29

Supply Fan Status Switch ................... 29

Remote Occupied Switch ................... 29

Power Exhaust (output) ..................... 29

CCN Communication Bus .................. 29

RTU Open Control System ................... 31

Supply Air Temperature (SAT) Sensor ......... 34

OutdoorAirTemperature(OAT)Sensor....... 34EconoMi$er2............................. 34

FieldConnections.......................... 35

SpaceTemperature(SPT)Sensors............ 35IndoorAir Quality(CO2)Sensor............. 35OutdoorAirQualitySensor................. 36SpaceHumiditySensororHumidistat......... 36SmokeDetector/FireShutdown(FSD)......... 37ConnectingDiscreteInputs.................. 37

CommunicationWiring- Protocols............ 38General ................................. 38

Local Access ............................. 39

RTU Open Troubleshooting ................. 39

Outdoor Air Enthalpy Control ................. 40

Differential Enthalpy Control ................ 40

Return Air Enthalpy Sensor ................. 41

Smoke Detectors ........................... 41

Step 11 - Adjust Factory-Installed Options ........ 51

Step 12 - Install Accessories ................... 51

UNIT START-UP CHECKLIST .................. 55

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service,maintenance, or use can cause explosion, fire, electrical

shock or other conditions which may cause personal injuryor property damage. Consult a qualified installer, service

agency, or your distributor or branch for information or

assistance. The qualified installer or agency must usefactory-authorized kits or accessories when modifying this

product. Refer to the individual instructions packaged withthe kits or accessories when installing.

Follow all safety codes. Wear safety glasses and work

gloves. Use quenching cloths for brazing operations andhave a fire extinguisher available. Read these instructions

thoroughly and follow all warnings or cautions attached tothe unit. Consult local building codes and appropriate

national electrical codes (in USA, ANSI/NFPA 70,National Electrical Code (NEC); in Canada, CSA C22.1)

for special requirements.

It is important to recognize safety information. This is the

safety-alert symbol A'x. When you see this symbol on the

unit and in instructions or manuals, be alert to the

potential for personal injury.

Understand the signal words DANGER, WARNING,CAUTION, and NOTE. These words are used with the

safety-alert symbol. DANGER identifies the most serious

hazards which will result in severe personal injury ordeath. WARNING signifies hazards which could result in

personal injury or death. CAUTION is used to identifyunsafe practices, which may result in minor personal

injury or product and property damage. NOTE is used tohighlight suggestions which will result in enhanced

installation, reliability, or operation.

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personalinjury or death.

Before performing service or maintenance operationson unit, turn off main power switch to unit and installlock(s) and lockout tag(s). Ensure electrical service torooftop unit agrees with voltage and amperage listedon the unit rating plate. Unit may have more than one

power switch.

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personalinjury, death and/or equipment damage.

Puron ® (R-410A) refrigerant systems operate athigher pressures than standard R-22 systems. Do notuse R-22 service equipment or components on Puronrefrigerant equipment.

PERSONAL INJURY AND ENVIRONMENTALHAZARD

Failure to follow this warning could cause personalinjury or death.

Relieve pressure and recover all refrigerant beforesystem repair or final unit disposal.

Ware safety glasses and gloves when handlingrefrigerants. Keep torches and other ignition sourcesaway from refrigerants and oils.

CUT HAZARD

Failure to follow this caution may result in personalinjury.

Sheet metal parts may have sharp edges or burrs. Usecare and wear appropriate protective clothing, safetyglasses and gloves when handling parts and servicingair conditioning equipment.

Rated Indoor Airflow (cfm)

The table to the right lists the rated indoor airflow usedfor the AHRI efficiency rating for the units covered in thisdocument.

Model Number Full Load Airflow (cfm)

50TC*A04 1275

50TC*A05 1400

50TC*A08 1800

50TC*A/B07 2200

Position: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Example: 5 0 T C - A 0 4 A 1 A 5 - 0 A 0 A 0

Unit Heat Type _l.I I

50 - Electric Heat /Packaged Rooftop

Model Series - WeatherMaker TM

TC - Standard Efficiency

Heat Options- = No Heat

Refrig. Systems OptionsA = Standard One Stage Cooling Models

B = Standard One Stage Cooling Models withHumidi-MiZer ® (07 models only)

Cooling Tons04 = 3 tons05 = 4 tons06 = 5 tons

07 = 6 tons

Sensor OptionsA = None

B = RA Smoke DetectorC = SA Smoke DetectorD = RA + SA Smoke Detector

E = CO2

F = RA Smoke Detector and CO2G = SA Smoke Detector and CO2

H = RA + SA Smoke Detector and CO2

Indoor Fan Options0 = Direct Drive, Standard Static Option (04/05/06 models only)1 = Belt Drive, Standard Static Option

2 = Belt Drive, Medium Static Option3 = Belt Drive, High Static Option

Coil Options - RTPF (Outdoor - Indoor - Hail Guard)A = AIICu - AIICuB = Precoat AI/Cu - AI/Cu

C = E-coat AI/Cu - AI/CuD = E-coat AI/Cu - E-coat AI/CuE = Cu/Cu - AI/Cu

F = Cu/Cu - Cu/CuM = AI/Cu -AI/Cu -- Louvered Hail Guard

N = Precoat AI/Cu - AI/Cu -- Louvered Hail GuardP = E-coat AI/Cu - AI/Cu Louvered Hail Guard

Q = E-coat AI/Cu - E-coat AI/Cu -- Louvered Hail GuardR = Cu/Cu - AI/Cu -- Louvered Hail GuardS = Cu/Cu - Cu/Cu Louvered Hail Guard

Coil Options - Novation (Outdoor - Indoor - Hail Guard)G = AIIAI - AI/Cu

H = AIIAI - Cu/CuJ = AI/AI - E-coat AI/Cu

K = E-coat AI/AI - AI/CuL = E-coat AI/AI - E-coatAI/Cu

T = AI/AI - AI/Cu -- Louvered Hail GuardU = AI/AI - Cu/Cu Louvered Hail GuardV = AI/AI - E-coat AI/Cu -- Louvered Hail Guard

W= E-coat AI/AI - AI/Cu Louvered Hail GuardX = E-coat AI/AI - E-coat AI/Cu Louvered Hail Guard

Packaging & Seismic Compliance0 = Standard

1 = LTL

3 = California Seismic Compliant Label

4 = LTL and CA Seismic Compliant Label

Electrical OptionsA = None

C = Non-Fused DisconnectD = Thru-The-Base ConnectionsF = Non-Fused Disconnect and

Thru-The-Base Connections

Service Options0 = None

1 = Unpowered Convenience Outlet2 = Powered Convenience Outlet

3 = Hinged Panels4 = Hinged Panels and

Unpowered Convenience Outlet5 = Hinged Panels and

Powered Convenience Outlet

Intake / Exhaust OptionsA = None

B = Temperature Economizer w/Barometric ReliefF = Enthalpy Economizer w/Barometric Relief

K = 2-Position DamperU = Temperature Ultra Low Leak Economizer

w/Barometric Relief

W= Enthalpy Ultra Low Leak Economizerw/Barometric Relief

Base Unit Controls

0 = Electromechanical Controls can be used with W7212

EconoMi$er IV (Non-Fault Detection and Diagnostic)1 = PremierLink Controller

2 = RTU Open Multi-Protocol Controller

6 = Electro-mechanical w/2-Speed Fan and W7220Economizer Controller Controls. Can be used with

W7220 EconoMi$er X (w/Fault Detection & Diagnostic)

Design Revision- = Factory Design Revision

Voltage1 = 575/3/603 = 208-230/1/605 = 208-230/3/60

6 = 460/3/60

NOTE: On single phase (-3 voltage code) models, the following

are not available as a factory installed option:- Coated Coils or Cu Fin Coils- Louvered Hail Guards

- Economizer or 2 Position Damper- Powered 115 Volt Convenience Outlet

Fig. 1 - 50TC 04-07 Model Number Nomenclature (Example)C150140

_°

I

=

2

NOTES:

I DIMENSIONS ARE IN INCHES, DIMENSIONS UNIT J

IN [ ] ARE IN MILLIMETERS¸ SOTC A04 33 3/8[847]

2 _ CENTER OF GRAVITYSOTC A05

S I_ DIRECTION OF AER FLOW SOTC A06

SOTC AO?

.... I I

FILTER ACCESS PANEL

(TOOL LESS_ DOMPACCESS CONDENSER• PANEL COIL

INDOOR COILACCESS PANEL

I I L)_)

2 5/8 _I

BACK [67]

TYPCURBWIDTH

44[1117]

F B B/4[95]

tI I

[118]

LEFT

33 3/8[848]

ECONOMIZER HOOD(OPTIONAL)

f16[406]

l10 7/8 _II

[277] RETURN

AIR

THRU THE BASE CHARTTHESE HOLES REOUERED FOR USE

CRBTMPWROOIAOl

14 1/4 12 1/A

[363] [31Z]

SUPPLYAIR

t[8B]

[818]TOP

CONTROL BOXACCESS PANEL

._00HANDLEj

INDOOR BLOWERACCESS

'czzzz%: " o3

[I888]

FRONT

SHEET OATE

IOF2 03 02 I5

6 _/8[ISS]

1 1/4

[32]

E STB_

CONDENSATE I

DRAIN i *i

16 314[427]

SUPPLY AIR I

[265]

i

_:_ 50TC 04 07 SINGLE ZONE ELECTRICAL 48TM50099411 24 08 COOLING WITH ELECTRIC HEAT

J [ t_sz]I[177]

26 7/8[682] BAROMETRIC

RELIEF

SUPPLy IV [793] t FLOWAIR RETURN

RIGHT AER

_°

I

_°

w

2

STD UNIT CORNER CORNER CORNER CORNER CG HEIGHTUNIT WEIGHT÷ WEIGHT (A) WEIGHT (B) WEIGHT (C) WEIGHT (D)

LBS HG H_p LBS _ f Z5OTC AO4 435 197 106 39 [ 91] 25 [635] 17 1/4 [_38]

§OTC ADS 485 220 117 53 115 52 126 57 128 58 37 [940] 24 [6_0] _7 _12 [445]

5OTC A06 515 234 116 53 125 57 143 65 132 60 38 [955] 24 [610] 17 3/4 [451]

5OTC AO7 607 275 150 68 160 73 153 69 144 65 38 [965] 22 [559] 20 5/4 [527]

÷ STANDARD UNIT WEIGHT IS WITHOUT ELECTRIC HEAT AND WITHOUT PACKAGINGFOR OTHER OPTIONS AND ACCESSOREES, REFER TO THE PRODUCT DATA CATALOG

CORNER A

CORNER D

-- 0

@

x _ TOP

QO ]2_3°:

FRONT

SHEET _ATE

aora 03 02 I5

CORNER B

CORNER C

SU?ERCEDES

11 24 0850TC 04 07 SINGLE ZONE ELECTRICAL

COOLING WITH ELECTRIC HEAT48TM500994

RE¥

F.6

LOCATION DIMENSION CONDITION

48-in (1219 mm) Unit disconnect is mounted on panel

18-in (457 mm) No disconnect, convenience outlet optionA18-in (457) mm Recommended service clearance12-in (305 mm) Minimum clearance

42-in (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall)B 36-in (914 mm) Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass)

Special Check sources of flue products within 10-ft of unit fresh air intake hood

36-in (914 mm) Side condensate drain is usedC18-in (457 mm) Minimum clearance

42-in (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall, another unit)D36-in (914 mm Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass)

NOTE: Unit not designed to have overhead obstruction. Contact Application Engineering for guidance on any applicationplanning overhead obstruction or for vertical clearances.

Fig. 3 - Service Clearance Dimensional Drawing

C08337

.INSTALLATION

Jobsite Survey

Complete the following checks before installation.

1. Consult local building codes and the NEC (NationalElectrical Code) (ANSI/NFPA 70) for special installa-

tion requirements.

2. Determine unit location (from project plans) or selectunit location.

3. Check for possible overhead obstructions which may

interfere with unit lifting or rigging.

Step 1 1 Plan for Unit Location

Select a location for the unit and its support system (curb

or other) that provides for minimum clearances requiredfor safety (including clearance to combustible surfaces),

unit performance and service access below, around andabove unit as specified in unit drawings. See Fig. 3.

NOTE: Consider also the effect of adjacent units.

Unit may be installed directly on wood flooring or onClass A, B, or C roof-covering material when roof curb isused.

Do not install unit in an indoor location. Do not locate airinlets near exhaust vents or other sources of contaminatedair.

Although unit is weatherproof, avoid locations that permitwater from higher level runoff and overhangs to fall ontounit.

Select a unit mounting system that provides adequate

height to allow installation of condensate trap per

requirements. Refer to Step 9 I Install ExternalCondensate Trap and Line - for required trap dimensions.

Roof Mount i

Check building codes for weight distributionrequirements. Unit operating weight is shown in Table 1.

Table 1 - Operating Weights

UNITS LB (KG)

05 06

494 (224) 524 (268)

50TC-*04 07

Base Unit 438 (199) 607 (275)

Economizer

Vertical 50 (23) 50 (23) 50 (23) 50 (23)

Horizontal 80 (36) 80 (36) 80 (36) 80 (36)

Humidi-MiZe( R, System N/A N/A N/A 41 (15)

Cu Fins 25 (11) 43 (20) 56 (25) 73 (33)

Powered Outlet 32 (15) 32 (15) 32 (15) 32 (15)

Curb

14-in/656 mm 110 (50) 110 (50) 110 (50) 110 (50)

24-in/610 mm 145 (66) 145 (66) 145 (66) 145 (66)

Step 2 -- Plan for Sequence of Unit Installation

The support method used for this unit will dictate differentsequences for the steps of unit installation. For example,on curb-mounted units, some accessories must be

installed on the unit before the unit is placed on the curb.Review the following for recommended sequences forinstallation steps.

Curb-mounted Installation --

Install curb

Install field-fabricated ductwork inside curb

Install accessory thru-base service connection package(affects curb and unit) (refer to accessory installationinstructions for details)

Prepare bottom condensate drain connection to suitplanned condensate line routing (refer to Step 9 fordetails)

Rig and place unitInstall outdoor air hood

Install condensate line trap and pipingMake electrical connections

Install other accessories

Pad-mounted Installation --

Prepare pad and unit supports

Check and tighten the bottom condensate drainconnection plug

Rig and place unit

Convert unit to side duct connection arrangement

Install field-fabricated ductwork at unit duct openingsInstall outdoor air hood

Install condensate line trap and pipingMake electrical connections

Install other accessories

Frame-mounted installation --

Frame-mounted applications generally follow thesequence for a curb installation. Adapt as required tosuit specific installation plan.

Step 3 -- Inspect unit

Inspect unit for transportation damage. File any claimwith transportation agency.

Confirm before installation of unit that voltage, amperageand circuit protection requirements listed on unit dataplate agree with power supply provided.

Step 4 -- Provide Unit Support

Roof Curb Mount --

Accessory roof curb details and dimensions are shown inFig. 4. Assemble and install accessory roof curb inaccordance with instructions shipped with the curb.

Curb should be level. This is necessary for unit drain to

function properly. Unit leveling tolerances are shown inFig. 5. Refer to Accessory Roof Curb Installation

Instructions for additional information as required.

Install insulation, cant strips, roofing felt, and counterflashing as shown. Ductwork must be attached to curb andnot to the unit. The accessory thru-the-base power andgas" connection package must be installed before the unitis set on the roof curb.

If electric and control wiring is to be routed through thebasepan, attach the accessory thru-the-base serviceconnections to the basepan in accordance with theaccessory installation instructions.

NOTE: The gasketing of the unit to the roof curb iscritical for a watertight seal. Install gasket supplied withthe roof curb as shown in Fig. 4. Improperly appliedgasket can also result in air leaks and poor unitperformance.

Slab Mount (Horizontal Units Only) --

Provide a level concrete slab that extends a minimum of 6

in. (150 mm) beyond unit cabinet. Install a gravel apron in

front of condenser coil air inlet to prevent grass andfoliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb

if required.

Alternate Unit Support (In Lieu of Curb or SlabMount) --

A non-combustible sleeper rail can be used in the unitcurb support area. If sleeper rails cannot be used, supportthe long sides of the unit with a minimum of 3 equallyspaced 4-in. x 4-in. (102 mm x 102 mm) pads on eachside.

4_I

co _=

f_

2

o

ROOF CURSACCESSORY # A

14"

CRRFCURB001A01 [356]

24"

CRRFCURB002A01 [610]

NOTES:

1 ROOFCURB ACCESSORY IS SHIPPED DISASSEMBLED

2 INSULATED PANELS: 254 [1 '7 THK POLYURETHANE FOAM 445 [1-3/4] # DENSITY

3 DiMENSiONS iN [ ] ARE iN MILLIMETERS4 ROOFCURB: 18 GAGE STEEL

5 ATTACH DUCTWORK TO CURB [FLANGES OF DUCT REST ON CURB)

6 SERVICE CLEARANCE 4 FEET ON EACH SiDE

7 E222_ DiRECTiON OF AiR FLOW

8 CONNECTOR PACKAGE CRBTMPWROO1A91 IS FOR THRU-THE-CURB GAS TYPE

PACKAGE CRBTMPWROO3A01 IS FOR THRU-THE-BO_OM TYPE GAS CONNECTIONS

CONNECTOR PKG ACC

CRBTMPWR001A01

542"

[137 7]

21 74"

[552 2]

GAS CONNECTION TYPE

THRUTHECURB

THRU THE BOTTOM

GAS FiTTiNG

3/4" [19] NPT

1/2" [127] NPT

POWER WiRiNG

FiTTiNG

3/4" [19] NPT

CONTROL WiRiNG

FiTTiNG

1/2" [12 7] NPT

I496" _

[126 0]

11519"

[385 0]

- 300"[762]

111400"

[355 6]

1 75" _

[44 5]

,., /

RETURN AiR

OPENING

113/4 "[44 5]

--21 04" --_ E[554 7]

it1603"

SUPPLY AIR [407 2]OPENING

!

70;

[18Ol

E

3219"- [817 6]

--2041" -- _ 300"

[518 3] [76 2]

_13 78"

[350o]

[1033 5]

VIEW "B"CORNER DETAIL

[444]

SECTIONE-ESCALE 0250

GAS SERVtCEPLATE L

THRU THE CURS

DRILL HOLE

2" [508] @

ASSEMBLY (iF

REQUIRED)

(SEE NOTE #8) -.

(SUPPLIED WiTH CURB)

(FIELD SUPPLIED)

--UNIT

_NAIL (FIELD SUPPLIED)

TYPICAL (4) SIDES

[11]

I/4,,

Fo] -- -

49/16"

%

I

SUPPLY AR RE[URN N R /

_ OVERALL DiM 5L7 3/8" WAS 5L7 718; 18GA

A MATER_AL WA 16 GA; NAIL FIELD SUPPLIED WAS

W_TH CURS

(FIELD SUPPLIED)

ROOFING FELT_(FIELD SUPPLIED)

(FIELD SUPPLIED)

OOHNG MATERIAL/_((FIELD SUPPLIED)

3'-1 3116"

[944 6]

SEE VIEW "B"

(FIELD SUPPLIED)

1'4-13116" _'J

[427] INSIDE

[61]i

5' 7-318"

[1711 3]

CERTIFIED DRAWING

DRAWING RELEASE LEVEL: PRODUCTION

_HIRD ANGLEPROJECTION

MATERIAL

ENGINEERING REQUIREMENTS

T-005. Y-002

WEIGHT: -

__1_SURFACEF_N_SH MFG'PURCH

ACCESSORY CONVENIENCE

OUTLET W_RING CONNECTOR

1/2" [12 7] NPT

/UNLESS O[HERW SE SPECiFiED /

DiMENSiONS ARE IN iNCHES J__[OLEPJ\NCES ON; tHIS D_UME_t A_ tHE It_FOR_tlOk COk tAIt_ED t _R_lt,_

/DEC 2DEC 3DEC ANG ISPROPRI£ tARYTO C_RIER COR_O_ktlOk AF_ S_kLL _t

AU [HORIZJ_I ION NUMBER lilLE

104173B CURB ASY, ROOFENGINEERIN G MANU AC [URIN G (004 007]

SiZE DRAW NG NUMBER REVDPJ\TER CHECKER r"l 48TC400427

DI SHEEr 50 5i

-- I .W_-AI

c

UM ALLOWABLE

'_ _ DIFFERENCE IN. (MM)B A-B i B-c ] A-C

0.5" (13) j_ 1.0" (25) I 1.0" (25)

C06110

Fig. 5 - Unit Leveling Tolerances

Step 5 -- Field Fabricate Ductwork

Cabinet return-air static pressure (a negative condition)

shall not exceed 0.35 in. wg (87 Pa) with economizer or0.45 in. wg (112 Pa) without economizer.

For vertical ducted applications, secure all ducts to roofcurb and building structure. Do not connect ductwork tounit.

Fabricate supply ductwork so that the cross sectionaldimensions are equal to or greater than the unit supply

duct opening dimensions for the first 18 in. (458 mm) of

duct length from the unit basepan.

Insulate and weatherproof all external ductwork, joints,

and roof openings with counter flashing and mastic inaccordance with applicable codes.

Ducts passing through unconditioned spaces must be

insulated and covered with a vapor barrier.

If a plenum return is used on a vertical unit, the returnshould be ducted through the roof deck to comply with

applicable fire codes.

PROPERTY DAMAGE HAZARD

Failure to follow this caution may result in damageto roofing materials.

Membrane roofs can be cut by sharp sheet metaledges. Be careful when placing any sheet metal partson such roof.

For Units with Accessory Electric Heaters --

All installations require a minimum clearance tocombustible surfaces of 1-in (25 mm) from duct for first12-in (305 mm) away from unit.

Outlet grilles must not lie directly below unit discharge.

NOTE: A 90-degree elbow must be provided in theductwork to comply with UL (Underwriters Laboratories)code for use with electric heat.

PERSONAL INJURY HAZARD

Failure to follow this warning could cause personalinjury.

For vertical supply and return units, tools or partscould drop into ductwork and cause an injury. Installa 90-degree turn in the return ductwork between theunit and the conditioned space. If a 90-degree elbowcannot be installed, then a grille of sufficient strengthand density should be installed to prevent objectsfrom falling into the conditioned space. Due toelectric heater, supply duct will require 90-degreeelbow.

Step 6 -- Rig and Place Unit

Keep unit upright and do not drop. Spreader bars are not

required if top crating is left on unit. Rollers may be usedto move unit across a roof. Level by using unit frame as a

reference. See Table 1 and Fig. 6 for additionalinformation.

Lifting holes are provided in base rails as shown in Fig. 6.

Refer to rigging instructions on unit.

Rigging materials under unit (cardboard to prevent basepan damage) must be removed PRIOR to placing the uniton the roof curb.

When using the standard side drain connection, ensure the

red plug in the alternate bottom connection is tight. Do thisbefore setting the unit in place. The red drain pan plug canbe tightened with a 1/2-in. square socket drive extension. For

further details see "Step 9 - Install External CondensateTrap and Line on page 12.

Before setting the unit onto the curb, recheck gasketing oncurb.

UNIT DAMAGE HAZARD

Failure to follow this caution may result inequipment damage.

All panels must be in place when rigging. Unit is notdesigned for handling by fork truck.

If using top crate as spreader bar, once unit is set,carefully lower wooden crate off building roof top toground. Ensure that no people or obstructions arebelow prior to lowering the crate.

REQUIRED

BARS

-SEE DETAIL "A"

PLACE ALL SEAL STRIP IN PLACEBEFORE PLACING UNIT ON ROOF CURB,

DETAIL "A"

UNIT

IN IN IN MM

74.5 38 33.5 850

74.5 38 33.5 850

74.5 38 33.5 850

74.5 38 41.5 1055

50TC-A04

50TC-A05

50TC-A06

50TC-A07

NOTES:

MAX WEIGHT

LB KG

740 336

795 361

865 393

1040 473

A

MM

1890

1890

1890

1890

DIMENSION

B

MM

965

965

965

965

1. SPREADER BARS REQUIRED -- Top damage will occur if spreader bars are not used.

2. Dimensions in ( ) are in millimeters.

3. Hook rigging shackles through holes in base rail, as shown in detail '_,." Holes in base rails are centered aroundthe unit center of gravity. Use wooden top to prevent rigging straps from damaging unit.

Fig. 6 - Rigging Details

C11292

Positioning on Curb --

Position unit on roof curb so that the following clearances

are maintained: 1/4 in. (6.4 mm) clearance between theroof curb and the base rail inside the front and rear, 0.0 in.clearance between the roof curb and the base rail inside onthe duct end of the unit. This will result in the distance

between the roof curb and the base rail inside on the

condenser end of the unit being approximately 1/4 in.

(6.4 mm).

Although unit is weatherproof, guard against water fromhigher level runoff and overhangs.

UNIT DAMAGE HAZARD

Failure to follow this caution may result inequipment damage.

All panels must be in place when rigging. Unit is notdesigned for handling by fork truck.

After unit is in position, remove rigging skids andshipping materials.

Step 7 -- Convert to Horizontal and Connect

Ductwork (when required)

Unit is shipped in the vertical duct configuration. Unit

without factory-installed economizer or return air smokedetector option may be field-converted to horizontal ducted

configuration. To convert to horizontal configuration,

remove screws from side duct opening covers and removecovers. Using the same screws, install covers on vertical

duct openings with the insulation-side down. Seals aroundduct openings must be tight. See Fig. 7.

REMOVABLE HORIZONTALRETURN DUCT OPENING COVER k

_. REMOVABLE HORIZONTAL

SUPPLY DUCT OPENING COVER

Fig. 7 - Horizontal Conversion PanelsC06108

Field-supplied flanges should be attached to horizontal

duct openings and all ductwork should be secured to theflanges. Insulate and weatherproof all external ductwork,

joints, and roof or building openings with counter flashingand mastic in accordance with applicable codes.

Do not cover or obscure visibility to the unit's informativedata plate when insulating horizontal ductwork.

10

Step 8 1 Install Outside Air Hood

Economizer and Two Position Damper HoodPackage Removal and Setup - Factory Option

NOTE: Economizer and Two Position Damper are not

available as factory installed options for size 04-06 single

phase (-3 voltage code) models.

1. The hood is shipped in knock-down form and must be

field assembled. The indoor coil access panel is used as

the hood top while the hood sides, divider and filter arepackaged together, attached to a metal support tray us-

ing plastic stretch wrap, and shipped in the return air

compartment behind the indoor coil access panel. Thehood assembly's metal tray is attached to the basepan

and also attached to the damper using two plastic tie-

wraps.

2. To gain access to the hood, remove the filter access

panel. (See Fig. 8.)

FILTER ACCESS PANEL

COMPRESSORACCESS PANEL

OUTDOOR-AIR OPENING ANDINDOOR COILACCESS PANEL

C06023

Fig. 8 - Typical Access Panel Locations

3. Locate the (2) screws holding the metal tray to thebasepan and remove. Locate and cut the (2) plastic

tie-wraps securing the assembly to the damper. (See

Fig. 9) Be careful to not damage any wiring or cuttie-wraps securing any wiring.

Hood Parts

steps outlined in Economizer Hood and Two-PositionHood, below.

Economizer Hood and Two-Position Hood i

NOTE: If the power exhaust accessory is to be installed

on the unit, the hood shipped with the unit will not beused and must be discarded. Save the aluminum filter for

use in the power exhaust hood assembly.

1. The indoor coil access panel will be used as the top of

the hood. Remove the screws along the sides and bot-tom of the indoor coil access panel. See Fig. 10.

TOPPANEL

TOPPANEL

INDOOR ", INDOORCOIL ", COILACCESSPANEL PANEL

C06025

Fig. 10 - Indoor Coil Access Panel Relocation

2. Swing out indoor coil access panel and insert the hood

sides under the panel (hood top). Use the screwsprovided to attach the hood sides to the hood top. Use

screws provided to attach the hood sides to the unit. See

Fig. 11.

TOP

INDOOR COILACCESS PANEL

LEFT

SIDE

Plastic Tie Wrap

Qty (2)

Screwsfor Metal TrayQty (2)

C08639

Fig. 9 - Economizer and Two-Position DamperHood Parts Location

4. Carefully lift the hood assembly (with metal tray)

through the filter access opening and assemble per the

HOOD DIVIDER

C06026

Fig. 11 - Economizer Hood Construction

3. Remove the shipping tape holding the economizer

barometric relief damper in place (economizer only).

4. Insert the hood divider between the hood sides. See

Fig. 11 and Fig. 12. Secure hood divider with 2screws on each hood side. The hood divider is also

used as the bottom filter rack for the aluminum filter.

11

5. Open the filter clips which are located underneath thehood top. Insert the aluminum filter into the bottomfilter rack (hood divider). Push the filter into positionpast the open filter clips. Close the filter clips to lockthe filter into place. See Fig. 12.

6. Caulk the ends of the joint between the unit top paneland the hood top.

7. Replace the filter access panel.

ALUMINUMFILTER

BAROMETRICRELIEF

Fig. 12 - Economizer Filter Installation

FILTERCLIP

C08634

Step 9 1 Install External Condensate Trapand Line

The unit has one 3/4-in. condensate drain connection on

the end of the condensate pan and an alternate connectionon the bottom. See Fig. 13. Unit airflow configurationdoes not determine which drain connection to use. Eitherdrain connection can be used with vertical or horizontal

applications.

MINIMUM PITCH

1" (25ram) PER

10' (3m) OF LINE\

\ OPEN

VENT_N, _

I SEE NOTETO

DRAIN

_'--.. ROOFCURB

DRAIN PLUG

2"(51) MIN

NOTE: Trap should be deep enough to offset maximum unit static

difference. A 4" (102) trap is recommended

C08022

Fig. 14 - Condensate Drain Piping Details

All units" must have an external trap for condensate

drainage. Install a trap at least 4-in. (102 mm) deep andprotect against freeze-up. If drain line is installed

downstream from the external trap, pitch the line awayfrom the unit at i-in. per 10 f! (25 mm in 3 m) of run. Do

not use a pipe size smaller than the unit connection(-%-in.).

Step 10 1 Make Electrical Connections

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could result in personalinjury or death.

Unit cabinet must have an uninterrupted, unbroken

electrical ground to minimize the possibility ofpersonal injury if an electrical fault should occur. Thisground may consist of electrical wire connected tounit ground lug in control compartment, or conduitapproved for electrical ground when installed inaccordance with NEC; ANSI/NFPA 70, latest edition

(in Canada, Canadian Electrical Code CSA [CanadianStandards Association[ C22.1), and local electricalcodes.

ALTERNATESTANDARD DRAIN PLUGSIDE DRAIN BOTTOM DRAIN

(FACTORY-INSTALLED)

Fig. 13 - Condensate Drain Pan (Side View)C08021

To use the alternate bottom drain connection, remove the

red drain plug from the bottom connection (use a 1/:-in.

square socket drive extension) and install it in the sidedrain connection.

The piping for the condensate drain and external trap can

be completed after the unit is in place. See Fig. 14.

NOTE: If the alternate bottom drain is not used check the

drain plug for tightness prior to setting the unit on the roofcurb.

NOTE: Check all factory and field electrical connectionsfor tightness. Field-supplied wiring shall conform withthe limitations of minimum 63 ° F (33 ° C) rise.

Field Power Supply i

If equipped with optional Powered Convenience Outlet:

The power source leads to the convenience outlet's

transformer primary are not factory connected. Installermust connect these leads according to required operation

of the convenience outlet. If an always-energizedconvenience outlet operation is desired, connect thesource leads to the line side of the unit-mounted

disconnect. (Check with local codes to ensure this method

is acceptable in your area.) If a de-energize via unit

disconnect switch operation of the convenience outlet isdesired, connect the source leads to the load side of theunit disconnect. On a unit without a unit-mounted

disconnect, connect the source leads to compressor

12

contactor C and indoor fan contactor IFC pressure lugswith unit field power leads.

Refer to Fig. 22 for power transformer connections andthe discussion on connecting the convenience outlet on

page 14.

Field power wires are connected to the unit at line-side

pressure lugs on compressor contactor C and indoor fancontactor IFC (see wiring diagram label for control box

component arrangement) or at factory-installed optionnon-fused disconnect switch. Max wire size is #2 AWG

(copper only). (See Fig. 15.)

NOTE: TEST LEADS - Unit may be equipped with

short leads (pigtails) on the field line connection points on

contactor C or optional disconnect switch. These leads are

for factory run-test purposes only; remove and discard

before connecting field power wires to unit connection

points. Make field power connections directly to line

connection pressure lugs only.

Units Without Disconnect Option

I I I I I"=

.=L==L=_ =A==L=J=_! Disconnect ! | Disconnect |

! per ! I per I

! NEC ! i NEC i

I=l===l=a =l==r==l==L1 L2 L3

208/230 1 60

208/230-3-60460 3-60

375-3-60

575 3 60

Units With Disconnect Option

(1-ph

IFM)

ELECTRICDISCONNECT

SWITCH

®Fig. 16 - Disconnect Switch and Unit

A93033

Units with Factory-Installed Non-Fused Disconnect --

The factory-installed option non-fused disconnect (NFD)switch is located in a weatherproof enclosure located

/

under the main control box. The manual switch handle and I

/

shaft are shipped in the disconnect enclosure. Assemble the

shaft and handle to the switch at this point. Discard thefactory test leads (see Fig. 15).

Connect field power supply conductors to LINE sideterminals when the switch enclosure cover is removed toattach the handle.

L1

L2

L3

q)G> Oot,ooa,@, Disconnect

Switch

4sco_n_ect fact ory test __

leads; discard.

Fig. 15 - Power Wiring Connections

FIRE HAZARD

Factory

Wiring

C07494

Failure to follow this warning could result inintermittent operation or performance satisfaction.

Do not connect aluminum wire between disconnect

switch and 50TC unit. Use only copper wire.(See Fig. 16.)

C12284

Fig. 17 - Location of Non-Fused Disconnect Enclosure

To field install the NFD shaft and handle:

1. Remove the unit front pane (see Fig. 2).

2. Remove (3) hex screws on the NFD enclosure - (2) onthe face of the cover and (1) on the left side cover.

3. Remove the front cover of the NFD enclosure.

4. Make sure the NFD shipped from the factory is atOFF position (the arrow on the black handle knob is

at OFF).

5. Insert the shaft with the cross pin on the top of the shaftin the horizontal position.

6. Measure from the tip of the shaft to the top surface of

the black pointer; the measurement should be 3.75 -3.88 in. (95 - 99 mm).

7. Tighten the locking screw to secure the shaft to theNFD.

8. Turn the handle to the OFF position with red arrowpointing at OFE

9. Install the handle on to the painted cover horizontally

with the red arrow pointing to the left.

10. Secure the handle to the painted cover with (2) screws

and lock washers supplied.

13

11. Engaging the shaft into the handle socket, re-install(3) hex screws on the NFD enclosure.

12. Re-install the unit front panel.

Q.

Convenience Outlets-

ELECTRICAL OPERATION HAZARD

Failure to follow this warning could result in personalinjury or death.

Units with convenience outlet circuits may usemultiple disconnects. Check convenience outlet forpower status before opening unit for service. Locateits disconnect switch, if appropriate, and open it.Lock-out and tag-out this switch, if necessary.

C12279

Fig. 18 - Handle and Shaft Assembly for NFD

Units Without Factory-InstalledNon-Fused Disconnect --

When installing units, provide a disconnect switch per

NEC (National Electrical Code) of adequate size.Disconnect sizing data is provided on the unit informative

plate. Locate on unit cabinet or within sight of the unit pernational or local codes. Do not cover unit informative

plate if mounting the disconnect on the unit cabinet.

All Units --

All field wiring must comply with NEC and all localcodes. Size wire based on MCA (Minimum Circuit Amps)

on the unit informative plate. See Fig. 15 and the unitlabel diagram for power wiring connections to the unit

power terminal blocks and equipment ground. Maximum

wire size is #2 ga AWG per pole.

Provide a ground-fault and short-circuit over-current

protection device (fuse or breaker) per NEC Article 440

(or local codes). Refer to unit informative data plate forMOCP (Maximum Over-current Protection) device size.

All field wiring must comply with the NEC and localrequirements.

All units except 208/230-v units are factory wired for thevoltage shown on the nameplate. If the 208/230-v unit is

to be connected to a 208-v power suppl); the controltransformer must be rewired by moving the black wirewith the 1/4-in. female spade connector from the 230-v

connection and moving it to the 200-v 1/4-in. male

terminal on the primary side of the transformen Refer to

unit label diagram for additional information. Field powerwires will be connected line-side pressure lugs on the

power terminal block or at factory-installed optionnon-fused disconnect.

NOTE: Check all factory and field electrical connectionsfor tightness.

Two types of convenience outlets are offered on 50TCmodels: Non-powered and unit-powered. Both types

provide a 125-volt GFCI (ground-faultcircuit-interrupter) duplex receptacle rated at 15-A

behind a hinged waterproof access cover, located on the

end panel of the unit. See Fig. 19.

NOTE: Unit powered convenience outlets are not

available as factory installed options for size 04-06 single

phase (-3 voltage code) models.

ConvenienceOutlet

Pwd-COTransformer

"_"_ Control Box

Access Panel

C08128

Fig. 19 - Convenience Outlet Location

Installing Weatherproof Cover: A weatherproofwhile-in-use cover for the factory-installed convenience

outlets is now required by UL standards. This cover cannotbe factory-mounted due its depth; it must be installed at unit

installation. For shipment, the convenience outlet is covered

with a blank cover plate.

On units with electro-mechanical controls the weatherproofcover kit is shipped in the unit's control box. The kit

includes the hinged cover, a backing plate and gasket.

On units with a factory installed direct digital controller(PremierLink TMor RTU Open) the weatherproof cover kit

is secured to the basepan underneath the control box. SeeFig. 20.

DISCONNECT ALL POWER TO UNIT AND

CONVENIENCE OUTLET. LOCK-OUT AND TAG-OUTALL POWER.

14

//

//

/

Weatherproof

Cover

C150149

Fig. 20 - Weatherproof Cover - Shipping Location on

Units with Factory Installed DDC

Remove the blank cover plate at the convenience outlet;discard the blank cover.

Loosen the two screws at the GFCI duplex outlet, untilapproximately 1/:-in (13 mm) under screw heads are

exposed. Press the gasket over the screw heads. Slip the

backing plate over the screw heads at the keyhole slotsand align with the gasket; tighten the two screws until

snug (do not over-tighten).

Mount the weatherproof cover to the backing plate asshown in Fig. 21. Remove two slot fillers in the bottom of

the cover to permit service tool cords to exit the cover.Check for full closing and latching.

COVER - WHILE-IN-USE RECEPTACLE

WEATHERPROOF NOT INCLUDED

' BASE PLATE FORGFCI RECEPTACLE

Fig. 21 - Weatherproof Cover InstallationC09022

Non-powered type: This type requires the field

installation of a general-purpose 125-volt 15-A circuitpowered from a source elsewhere in the building. Observe

national and local codes when selecting wire size, fuse or

breaker requirements and disconnect switch size andlocation. Route 125-v power supply conductors into the

bottom of the utility box containing the duplex receptacle.

Unit-powered type: A unit-mounted transformer is

factory-installed to stepdown the main power supply

voltage to the unit to l15-v at the duplex receptacle. Thisoption also includes a manual switch with fuse, located in

a utility box and mounted on a bracket behind theconvenience outlet; access is through the unit's control

box access panel. See Fig. 19.

The primary leads to the convenience outlet transformer arenot factory-connected. Selection of primary power source is

a customer-option. If local codes permit, the transformerprimary leads can be connected at the line-side terminals onthe unit-mounted non-fused disconnect or HACR breaker

switch; this will provide service power to the unit when the

unit disconnect switch or HACR switch is open. Otherconnection methods will result in the convenience outlet

circuit being de-energized when the unit disconnect or

HACR switch is open. See Fig. 22.

Using unit-mounted convenience outlets: Units with unit-

mounted convenience outlet circuits will often require that

two disconnects be opened to de-energize all power to theunit. Treat all units as electrically energized until the con-

venience outlet power is also checked and de-energization isconfirmed. Observe National Electrical Code Article 210,Branch Circuits, for use of convenience outlets.

SCHEMATIC - CONVENIENCE OUTLET

460V

YEL BL

SECONDARY

12or

240VNOTES:

8LU--I CONNECT PER

GRA--LOCAL CODE

RES--2 FOR 240v SUPPLYYEL--cONNECT 8LU TO GRA

AND RED TO YEL

RED YEL BLU GRA.JTRAN4

RED GHA I _ _'_ _ _, _3

14i IJ2 8LK_ t--l-- WHT

120V GROUND FAULT

T / O0 T ,TUTr0dI--GRN-VEk_YELsEcONDARY

1 ?ON BLK WHT--

___SWITCH FUSE

C08283

UNIT CONNECT PRIMARY TRANSFORMERVOLTAGE AS CONNECTIONS TERMINALS

208, 240 LI: RED +YEL H1 + H3230 L2: BLU + GRA H2 + H4

L1 : RED H1

460 480 Splice BLU + YEL H2 + H3L2: GRA H4

L1 : RED H1575 600

L2: GRA H2

Fig. 22 - Powered Convenience Outlet Wiring

Test the GFCI receptacle by pressing the TEST button on

the face of the receptacle to trip and open the receptacle.Check for proper grounding wires and power line phasing

if the GFCI receptacle does not trip as required. Press the

RESET button to clear the tripped condition.

Fuse on power type: The factory fuse is a Bussman

"Fusetron" T-15, non-renewable screw-in (Edison base)type plug fuse.

Convenience Outlet Utilization

Maximum Continuous use : 8 Amps 24/7

I _0........ I "

C13415

Fig. 23 - Convenience Outlet Utilization Notice Label

15

Factory- Option Thru-Base Connections --

This service connection kit consists of a 1/2-in electricalbulkhead connector and a 3/4-in electrical bulkhead

connector, all factory-installed in the embossed (raised)section of the unit basepan in the condenser section. The3/4-in bulkhead connector enables the low-voltage controlwires to pass through the basepan. The 1/2-in electricalbulkhead connector allows the high-voltage power wiresto pass through the basepan. See Fig. 24.

LOW VOLTAGE. CONDUIT

ECTOR

/ _ HIGH VOLTAGE" CONDUIT

CONNECTOR

C13412

Fig. 24 - Thru-Base Connection Fittings

Check tightness of connector lock nuts before connectingelectrical conduits.

Field-supplied and field-installed liquid tight conduitconnectors and conduit may be attached to the connectorson the basepan. Pull correctly rated high voltage and lowvoltage through appropriate conduits. Connect the powerconduit to the internal disconnect (if unit is so equipped)or to the external disconnect (through unit side panel). Ahole must be field cut in the main control box bottom onthe left side so the 24-v control connections can be made.

Connect the control power conduit to the unit control boxat this hole.

Units without Thru-Base Connections --

1. Install power wiring conduit through side panel open-ings. Install conduit between disconnect and controlbox.

2. Install power lines to terminal connections as shownin Fig. 15.

Voltage to compressor terminals during operation must bewithin voltage range indicated on unit nameplate. SeeTable 10. On 3-phase units, voltages between phases mustbe balanced within 2% and the current within 10%. Use

the formula shown in the legend for Table 10, Note 2 todetermine the percent of voltage imbalance. Operation onimproper line voltage or excessive phase imbalanceconstitutes abuse and may cause damage to electricalcomponents. Such operation would invalidate anyapplicable Carrier warranty.

Field Control Wiring --

The 50TC unit requires an external temperature control

device. This device can be a thermostat (field-supplied)or a PremierLink controller (available as factory-installed

option or as field-installed accessory, for use on a CarrierComfort Network or as a stand alone control) or the RTUOpen Controller for Building Management Systems usingnon-CCN protocols (RTU Open is available as afactory-installed option only).

Thermostat --

Select a Carrier-approved accessory thermostat. Whenelectric heat is installed in the 50TC unit, the thermostat

must be capable of energizing the G terminal (to energize

the Indoor Fan Contactor) whenever there is a space call

for heat (energizing the Wl terminal). The accessorythermostats listed on the unit price pages can provide this

signal but they are not configured to enable this signal asshipped.

Install the accessory thermostat according to installationinstructions included with the accessory.

Locate the thermostat accessory on a solid wall in the

conditioned space to sense average temperature inaccordance with the thermostat installation instructions.

If the thermostat contains a logic circuit requiring 24-vpower, use a thermostat cable or equivalent single leads ofdifferent colors with minimum of seven leads. If the

thermostat does not require a 24-v source (no "C"connection required), use a thermostat cable or equivalentwith minimum of six leads. Check the thermostatinstallation instructions for additional features which

might require additional conductors in the cable.

For wire runs up to 50 ft. (15 m), use no. 18 AWG(American Wire Gage) insulated wire [35°C (95°F)minimum]. For 50 to 75 ft. (15 to 23 m), use no. 16 AWGinsulated wire [35°C (95°F) minimum]. For over 75 ft.(23 m), use no. 14 AWG insulated wire [35°C (95°F)minimum]. All wire sizes larger than no. 18 AWG cannotbe directly connected to the thermostat and will require ajunction box and splice at the thermostat.

TtypicalThermostatCorrections

©@@@

@(Note 1)

©@

(Note 3)

(Note 2)

Central

TerminalBoard

Fq

Fq

THERMOSTAT

Note 1 : Typical multi-function marking. Follow manufacturer's confi(instructions to select Y2.

Note 2:Y2 to Y2 connection required on single-stage cooling units whenintegrated economizer function is desired

Note 3:W2 connection not required on units with single-stage heating.

___ Field Wiring

Fig. 25 - Low-Voltage Connections

uration

C08575

16

Unit without Thru-Base Connection Kit --

Pass the thermostat control wires through the hole

provided in the corner post; then feed the wires throughthe raceway built into the corner post to the control box.

Pull the wires over to the terminal strip on the upper-leftcorner of the Controls Connection Board. See Fig. 26.

RACEWAY

HOLE IN END PANEL (HIDDEN)

C08027

Fig. 26 - Field Control Wiring Raceway

NOTE: If thru-the-bottom connections accessory is

used, refer to the accessory installation instructions for

information on routing power and control wiring.

Heat Anticipator Settings --

Set heat anticipator settings at 0.14 amp for the first stageand 0.14 amp for second-stage heating, when available.

Electric Heaters

50TC units may be equipped with field-installedaccessory electric heaters. The heaters are modular in

design, with heater frames holding open coil resistancewires strung through ceramic insulators, line-break limitswitches and a control contactor. One or two heater

modules may be used in a unit.

Heater modules are installed in the compartment below

the indoor (supply) fan outlet. Access is through the

indoor access panel. Heater modules slide into thecompartment on tracks along the bottom of the heater

opening. See Fig. 27, Fig. 28 and Fig. 29.

Not all available heater modules may be used in every

unit. Use only those heater modules that are UL listed for

use in a specific size unit. Refer to the label on the unitcabinet for the list of approved heaters.

Unit heaters are marked with Heater Model Numbers. But

heaters are ordered as and shipped in cartons marked with

a corresponding heater Sales Package part number. SeeTable 2 for correlation between heater Model Number and

Sales Package part number.

NOTE: The value in position 9 of the part number differs

between the sales package part number (value is 1) and a

bare heater model number (value is 0).

DISCONNECT MOUNTINGLOCATION

UNIT BLOCK-OFFPANEL

INDOOROUTDOOR ACCESSACCESS PANEL PANEL

C08133

Fig. 27 - Typical Access Panel Location (3-5 Ton)

DISCONNECTMOUNTING (FIELD-SUPPLIED)LOCATION t /

i

SINGLE P'QIN]MAIN BRACKET AND BOXCONTROL CONDUIT MOUNTINGBOX DRIP BOOT SCREW

EMT OR RIGID CONDUIT SINGLE CENTER MANUAL RESETPOINT BOX POST LIMIT SWITCH

HEATER HEATER HEATERMODULE MODULE MOUNTING(LOCATION 1) (LOCATION 2) BRACKET

CONTROL WIRE TERMINAL BLOCK

C08134

Fig. 28 - Typical Component Location

Fig. 29 - Typical Module InstallationC08135

17

Bare Heater Model Number

Heater Sales Package PNOIncludes:

Bare HeaterCarton and packing materialsInstallation sheet

Table 2 - Heater Model Number

Single Point Boxes and Supplementary Fuses i

When the unit MOCP device value exceeds 60-A,

unit-mounted supplementary fuses are required for each

heater circuit. These fuses are included in accessorySingle Point Boxes, with power distribution and fuse

blocks. The single point box will be installed directlyunder the unit control box, just to the left of the partition

separating the indoor section (with electric heaters) from

the outdoor section. The Single Point Box has a hingedaccess cover. See Fig. 30. The Single Point Box also

includes a set of power taps and pigtails to complete thewiring between the Single Point Box and the unit's main

control box terminals. Refer to the accessory heater and

Single Point Box installation instructions for details on tapconnections.

All fuses on 50TC units are 60-A. (Note that all heatersare qualified for use with a 60-A fuse, regardless of actual

heater ampacity, so only 60-A fuses are necessary.)

Single Point Boxes without Fuses i

Unit heater applications not requiring supplemental fusesrequire a special Single Point Box without any fuses. The

accessory Single Point Boxes contain a set of power tapsand pigtails to complete the wiring between the SinglePoint Box and the unit's main control box terminals. Refer

to accessory heater and Single Point Box installationinstructions for details on tap connections.

CONTROLBOX

BUSHING

SINGLEPOINT BOXMOUNTINGSCREWS

DRIP BOOTBRACKETMOUNTINGSCREWS

POWERWIRES

FOAMBUSHING

HEATERRELAYS

HEATERMOUNTINGSCREWS

Fig. 30 - Typical Single Point InstallationC14253

Low-Voltage Control Connections i

Pull the low-voltage control leads from the heatermodule(s) - VIO and BRN (two of each if two modules

are installed; identify for Module #1) - to the 4-poleterminal board TB4 located on the heater bulkhead to the

left of Heater #1. Connect the VIO lead from Heater #1 to

terminal TB4-1. For 2 stage heating, connect the VIO

lead from Heater #2 to terminal TB4-2. For 1 stage

heating with 2 heater modules connect the VIO lead fromboth Heater #1 and #2 to terminal TB4-1. Connect both

BRN leads to terminal TB4-3. See Fig. 31.

CTB

ICONTL 11BOARD I

<Z2> "IT- VlO

,,I

_> --4---OaN----I

I

@.,@1 BRN

L ........ .I

ORN VlO BRN

','.... 4 ........... ;,

Field

Connections o--I ..... h ....

i .::>.,-vlo ,

HR1 : On Heater 1 in Position #1

HR2: On Heater 2 in Position #2 (if installed)

C08331

Fig. 31 - Accessory Electric Heater ControlConnections

18

Humidi-MiZer @ Control Connections _"

Humidi-MiZer - Space RH Controller i

NOTE: The Humidi-MiZer is a factory installed option

which is available for 07 models only.

NOTE: The Humidi-MiZer is a factory installed option.Humidi-MiZer is not available for size 04-06 single

phase (-3 voltage code) models.

The Humidi-MiZer dehumidification system requires afield-supplied and -installed space relative humidity

control device. This device may be a separate humidistatcontrol (contact closes on rise in space RH above control

setpoint) or a combination thermostat-humidistat controldevice such as Carrier's EDGE (n_Pro Thermidistat with

isolated contact set for dehumidification control. The

humidistat is normally used in applications where atemperature control is already provided (units with

PermierLink TM control).

To connect the Carrier humidistat (HL38MG029):

1. Route the humidistat 2-conductor cable (field-sup-

plied) through the hole provided in the unit corner

post.

2. Feed wires through the raceway built into the corner

post (see Fig. 26) to the 24-v barrier located on the

left side of the control box. The raceway provides theUL-required clearance between high-voltage and

low-voltage wiring.

3. Use wire nuts to connect humidistat cable to two

PINK leads in the low-voltage wiring as shown in

Fig. 34.

To connect the Thermidistat device (33CS2PPRH-01):

1. Route the Thermidistat multi-conductor thermostat

cable (field-supplied) through the hole provided inthe unit corner post.

2. Feed wires through the raceway built into the corner

post (see Fig. 26) to the 24-v barrier located on the

left side of the control box. The raceway provides theUL-required clearance between high-voltage and

low-voltage wiring.

3. The Thermidistat has dry contacts at terminals DIand D2 for dehumidification operation (see Fig. 35).

The dry contacts must be wired between CTBterminal R and the PINK lead to the LTLO switch

with field-supplied wire nuts. Refer to the installation

instructions included with the Carrier EdgeThermidistat device (Form 33CS-65SI or latest) formore information.

40@

_oE-31-

L:IT

L L

C09295

Fig. 32 - Accessory Field-Installed Humidistat

-q

ICactual_mp

59outside temp

I;3,n ,p mtJ I

Fig. 33 - EDGE Pro ThermidistatC09296

EconoMi$er X (Factory-Installed Option) i

For details on operating 50TC units equipped with thefactory-installed EconoMi$er X option, refer to

Factory-Installed Economizers for TCTTCQ/HCTHCQ/LC/KC/KCQ Rooftop Units, 3 to 27.5 Nominal Tons.

Economizer Supplement Related to California Title 24(Catalog No. SUP-TI24-02SI, or later).

19

LTLO FIOP_ ..... PLI_"2 CB TRA_FRO_POWERSCHEMATIC

I I I ,.._<-(D I I _._ H _111_ _4_LU+_-BLU4 I _"_ _2C_0L_

GRA_ 6 p 7 I ELECTRTC

REHEAT I _ III , I ....... _ _"*-A_--_"_ cCONTROL I ..... I I I I I '_ _ _ _

,.", ,_--L 'L"_ IIII I '1___ i_ _o_ .........r _ / IIII I I I It I--, _ I __-_ ......./ I1_ I

/ ,,! j ,...... i-- B_ EEl) , : ORN BL_I BR,_ GRA

I)DC ,,"-, , ' , . ' , ' . _ R_ ÷T'STAT ...... _._ ..... i......... ' ' : . 4 BL-_k

YEL___. " . 'r If : ............. :_ :..... ', , : ', : : , ' .... BL

.._.I_]_._+ " , . ...... _ .... L _.. , -, ....... , ', _ (z)_), I

....--_ ................... : l_l _ i/ +_t_--: !: .... :--: i i:! : :l_i ...... _ ....

_._1----_'_-........:: _--':_-T_'r_X_Tn_'_-Y_-'_Im-_-_-®-_l....I..... I ='_

_ I I .... i I',111111 r _

Fig. 34 - 50TC-B07 (unit with Humidi-MiZer _ Adaptive Dehumidification System) Humidistat Wiring0150155

EDGE Pro THERMIDISTAT

I

Rc ....Rh @Wl ....

G ....Y2 ....C ....

O/W2/B ....Y1 ....

I

OAT @RRS @

SRTN ©HUM @

D1 ....D2V+Vg

I

-4

I

-]--;-q--_ .....

I

_4__ __i__ I----q

_---- 1

I I

I

Unit CTBTHERMOSTAT

@

I

I __ OI

I

I F----_

--I I

I I

--I -' E --_

I I

I I

/I

I

X*

C

G

W2

Wl

Y2

Y1

R

Humidi-MiZer TM FlOP

'..... PNK-- _ THERMOSTAT i

] i LTLO i--J-- - PNK-- -- <_Jo_ REHEAT I

' _ CONTROLI......................_u_._J

*Connection not required.

Fig. 35 - 50TC-B07 (unit with Humidi-MiZer Adaptive Dehumidification System)with EDGE Pro Thermidistat Device

009298

2O

PremierLink TM (Factory-Option)

HVAC SENSOR INPUTS

SPACE TEMP

SET POINT

SUPPLY AIR TEMP

OUTDOOR TEMP --_

INDOOR AIR QUALITY _-_

OUTDOOR AIR QUALITY

DUAL MODE SENSORiSTAT

REMOTE OCCUPANCY (G)

COMP SAFETY (Y1) /

FIRE SHUTDOWN (Y2) //_

SUPPLY FAN STATUS (W1)

NOT USED (W2)

ENTHALPYSTATUS(ENTH)

/ t / t "4 "-4 ",CCNiLEN NAVIGATOR 420MA INDOOR COMPR HEAT EXHAUST

PORT PORT ECONOMIZER FANMOTOR 1 & 2 LOW/HIGH RVSVALVE

OUTPUTS

C08199

Fig. 36 - PremierLink Controller

The PremierLink controller (see Fig. 36) is compatiblewith Carrier Comfort Network ® (CCN) devices. This

control is designed to allow users the access and ability tochange factory-defined settings, thus expanding thefunction of the standard unit control board. CCN service

access tools include System Pilot (TM), Touch Pilot (TM)and Service Tool. (Standard tier display tools Navigator TM

and Scrolling Marquee are not suitable for use with latestPremierLink controller (Version 2.x).)

The PremierLink control is factory-mounted in the 50TCunit's main control box to the left of the Central Terminal

Board (CTB). Factory wiring is completed throughharnesses connected to the CTB thermostat. Field

connections are made at a 16-pole terminal block (TB1)located on the bottom shelf of the unit control box in front

of the PremierLink controller. The factory-installedPremierLink control includes the supply-air temperature

(SAT) sensor. The outdoor air temperature (OAT) sensor isincluded in the FIOP/accessory EconoMi$er TM 2 package.

The PremierLink controller requires the use of a Carrierelectronic thermostat or a CCN connection for timebroadcast to initiate its internal timeclock. This is

necessary for broadcast of time of day functions

(occupied/unoccupied).

NOTE: PremierLink controller is shipped in Sensormode. To be used with a thermostat, the PremierLink

controller must be configured to Thermostat mode. Refer

to PremierLink Configuration instructions for OperatingMode.

PREMIERLINKFIOP

DDC

IT11711gllW1_IT;111q1_

++

TERMINALBOARD

5 I FM TDR ]

CAPIOR

OFC

+ IT A"I÷

+

Cl

+

IFC+ +3PH IFM

+ ONLY

+IPH IFM ON 3PH

UNIT ONLY

+ \1/

JI LEDEl

IGC

Fig. 37 - 50TC Control Box - PremierLink Location

F ..... q_

:ACCESSORY:

C150009

21

_} ..... p i_ z CB TRAE F O_ POWER SCHEMATIC

_-_-_ : :: :':i i I- °'"_ _ _ _°I_.......... u F_ .... : " P_K P - I_fRWI ""I .... II1_1 I __ ml _j_l_l , , , _1T_O,_LV._#÷>,,- I / / I J_'J J,_..............J

I I IF_I +1 I.cl I_11 - "TTA'_' I : : : :1 ,_o_, c_*#-_.* I / / I +,o__,_]_,_. -B_ ..... : : GR_-GR_- ''°_

COMPONENT ARRANGEMENT - RCOMPRESSORSHOWH " = °_'__ _'°_"'lllll _;,c_ I"" ROTES I TE ..... L BOARD SCHEMATIC LAYOUT DOES NO....... CT AL TE..... L HOARD TO SIMPLIFY CIRC ....... CER F_ TDR: .... _ .... _ I Ri_ s.__I_ R o i_p_II I _,AIoP_

• Hi EHSURE OESIGNATEH J MPEHS ON TERMINAL HOARD ARE CUT WHEH AHDIHG SMOKE DETECTORS, PHASE LOSS RELAY, CONTROL ;_ 1 1 I _ _ B_IR _I B _I I F_{ ._-_I_23_)_._I: o_ IB,L_RI II W_T IP_BIB_NGIRA

OCCUPANCY At_H REMOTE SHUTDOWN ; _;_L_" .... J J J_ REID B"IBIRNIII _""ll R_ _R_ J ,o_3 FOR SINGLE STAGE ELECTRIC HEAT OPTION, HOVE VIOLET HEATER WIRE FROM TH4-VIOLET WIRE TO TH4-OHANGE WIRE I I I l l l I I I) l// I I I J _I'F J FOR FIEL} USz

TB4 H LOCATED N HEAT SECT ON • • I I I I _J.J_ V_ ,_ \ / I/ I II 5 IFCOCCURHWITHOUTDIREHTORIVEONLY GRA I I I I O_U_ _' I_ I _ I_W_V I _ II

...... EDWIRE:_-ENTHSENSRLO ...... ER, HOEC@,Y, I) "1 / I i I i IIII * i" II_f_ _ .... DIHCRETE II ...... I I ..... H I _ _ _44-_¢-'_ ..... : t _ I:..........: .... THOWHII

BRN ffD BLI_ BLU OR'_ i VlO.d _ _ _I VlO_VlO- it r ,I ............. _ ........ . ......_ I I I I lYl_"l I ,_ ........ II.."m ,i It; _ ,i , L_ _<z>-I-.--.--I_[, , : :..1@{I I 'l'zl"I%?t IEF-:*"IIII_ ,_oo2_ E_ r_ r_lrhlr_l_1414 Ir__._-_--4q, ...... _ its _ _,, _=:IL_.I: ............ : : : : :!:l__,_, I _/_ _ I

_H :(+ _ +} LOOP AO CO_ OAO At i I_ I _oo I _ _ I a_ I .................. : I It 4 ' I _ _ /........... _,RI I I,,Iw,T ' _ I_ _ _ III _ S..... ITH_O-I.... ::: ..... lCt:_! I L S.... _ ' __IT. {--I-y E -- .;;: ....... ; r .... ........ -_: ....... ;........ :- - -{_

_; R., IC_P I I I I ' I LYsS,,,xs£@lr_ I/ _ _ ..... ......................... : I_l_ .....................=. _I_>_ ore SAFE FS_ SS FLTER CD, GO_. / _ z _ I z_T_L " ...... :":'" ' r ' ' I#_ I s / " _

I _ I I I IBL I _" ...... _l : 'l ' _ " __7___ ' L¢_ $_$c$_$__'¢ "_ _,_1

__ .... L I I 1:_ I:_ '_, I _ q __'I_ / I : : :1:1: _:_:T;_: _ _ _I_GD>)Lp_K I I I I L III:( ' _{ ' I_ ) ......... _ _z) _

_ PRE_IERLINI<OPTION ,_ ,, L--, _J_,<,_l_ L '_l L ...... 'q __ r-_'_ II Ir_ #a r_ r_ Ca A r_ ca ca r_ r_ I EC_ o _-C-

_3_>_ , (FIOPIACCESSORY) , ) ];- ]_- J_- I_ 1 _ _ F- )'_- J_-l? _ _

_ I , I> I ?t ? _t I I I I I

9

I',J

i ii i .........

I _ i; ': L ..... :

HOTE, ,0 EA:->dFi:OCCUPANCY AHS REMOTE SHUTSOWM ,TON ,_L

s FOR SINGLE STAGE ELECTRIC HEAT OPTION, HoVE VIOLET HEATER WIRE FROM TB4 VIOLET wIRE TO TS4 ORANGE wIRE

p 4 TBN IS LOCATES IM HEAT SECTION5 IFC OCCURS WITHOUT SIRECT DRIVE ONLY I

6 MARKED WlRE:_- EHTH SEHSR LO (FROM TERM BU ECOH F_ )

w ___2I I DIqCRETE 020 ..... LOS

I_ _} _-BLE- _ _ _ _ _ _ _ _ _ /= _@_3_._-iW"TI BLE_-- ...... I_ .....

_L U_:IBLI'_BR_I-_B I --

=I / / . r ......... ..... _>_I, I I I_lll i. E.....,E..... --II z LI (F UP/ _FIOPI .......

_F_ I I II I : A R_, I ..... _ F ......

_ c_ r_lr_lr_g_n_l_ I r_=--_, ........ _ _ _ '_l_ SE ...... 0 ...... LOOP IAo COM 0_0' OT ', _ ' I _oo_ _ IT_ L_ :

IP I I I hH I I I IO I_ "10SPACE TEar/OFFSET ANALOG SENSORS BLK I ' I

_> RMTIC_PI I I I I L_-'"T--:U'_-- I I r _/ II I _ _<_ __- .....

LI_E_ _C/ SAFE/ FSR/ SFS/ FILTER/ CCNCOMM I I __ _.J_ I / / _l Ii/ _ / Zl Z

FI_-_BLU-II G I Y I Y_I w I w2I ..... i I _ _ i_ I_ _ % _ Lt_, :7 .....

i i_ E_SOR . _ I_

__ I _ I rI I I BI I .... J 'l : / 'l '

_7/_-R[O I'= -- ' _k =L ,

_ I I I I [w..... H_ I. -i I I. ' , •

F_>??_ I _II 7 I I LFII__I i LI_ : _ _ ...._%,_ PREMIERLINK OPTION BLU : L---I:_A_G_ I_l L ...... % 12 III(

_ I ' I{FIOPIACCESSORY) I ,

¢_ TRA_ FRO_ POWERSCHEMATIC

_7" __o,,--k?<-_l _ I I.__;_ ,_I I bo,,_<-_ I " _ I F,I _%_'"

_Ht _ NO _- R,_GRA • .ore

' _O_ULe _ .....

r_v SEE _OtE 5 _. [_tB_

lilt CLV _-- II 3.......

_-VI_- I I ,,, -................-i_'/>_/i°lTI! I ,_-

7I_._i_lZZZ:_ii:: i :.;.t..-.'_._i..iiiLiL...-[c_i_ _=._-=-i_

p"_: IL_I : ............. I_ T __%"°

eL_{-{_- _-Ir" : .... : : : : .... : : ..... I I I

;_-_:,1"_t; ............ ;-:--:........ i i _t_: _l_sr'll

---_K<-GD-.............. ' ' ' ' : : qD->t_I ,,,,, ........:i :l_l ......LI BLa_

I--'EL_eK_'____['::'....... : :':'''''-':: :: : _- : : I_<_.t : .>_"'_.+c2_:................ ' " ' e z :_._ .... :: _

-_<-@. _-_-_: _ _ =:_:_:_ i _ _

; .... T _ T'?: i- _-_

I I I I I I I I I I I (SEE NOTE I) _

o

Supply Air Temperature (SAT) Sensor i

On FIOP-equipped 50TC unit, the unit is supplied with asupply-air temperature (SAT) sensor (33ZCSENSAT).This sensor is a tubular probe type, approx 6-inches (152mm) in length. It is a nominal 10-k ohm thermistor.

The SAT is factory-wired. The SAT probe is wire-tied to

the supply-air opening (on the horizontal opening end) inits shipping position. Remove the sensor for installation.

Re-position the sensor in the flange of the supply-airopening or in the supply air duct (as required by local

codes). Drill or punch a 1/2-in. hole in the flange or duct.

Use two field-supplied, self-drilling screws to secure thesensor probe in a horizontal orientation. See Fig. 40.

@ __

SUPPLYAIR

C08200

__ROOFCURB

Fig. 40 - Typical Mounting Location for Supply AirTemperature (SAT) Sensor on Small Rooftop Units

NOTE: Refer to Form 33SC-68SI for complete

PremierLink configuration, operating sequences and

troubleshooting information. Have a copy of this manual

available at unit start-up.

NOTE: The sensor must be mounted in the dischargeairstream downstream of the cooling coil and any heating

devices. Be sure the probe tip does not come in contact

with any of the unit's heater surfaces.

Outdoor Air Temperature (OAT) Sensor i

The OAT is factory-mounted in the EconoMi$er2 (FIOPor accessory). It is a nominal 10k ohm thermistor attachedto an eyelet mounting ring.

EconoMi$er2 1

The PremierLink control is used with EconoMi$er2

(option or accessory) for outdoor air management. Thedamper position is controlled directly by the PremierLink

control; EconoMi$er2 has no internal logic device.

Outdoor air management functions can be enhanced withfield-installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors)

Space CO2 sensor

Outdoor air CO2 sensor

Refer to Table 3 for accessory part numbers.

Field Connections

Field connections for accessory sensor and input devices

are made at the 16-pole terminal block (TB1) located onthe control box bottom shelf in front of the PremierLink

control (See Fig. 38 or Fig. 39). Some input devices alsorequire a 24-vac signal source; connect at CTB terminal

R at "THERMOSTAT" connection strip for this signalsource. See connections figures on following pages for

field connection locations (and for continued connections

at the PremierLink board inputs).

Table 4 provides a summary of field connections for units

equipped with Space Sensor. Table 5 provides a summary offield connections for units equipped with Space Thermostat.

Table 3 - PremierLink Sensor Usage

OUTDOOR AIR RETURN AIROUTDOOR AIR RETURN AIR

APPLICATION TEMPERATURE TEMPERATUREENTHALPY SENSOR ENTHALPY SENSOR

SENSOR SENSOR

Differential Dry BulbTemperature with

PremierLink

(PremierLink requires4- 20 mA Actuator)

Single Enthalpy withPremierLink

(PremierLink requires4- 20mA Actuator)

Differential Enthalpywith PremierLink

(PremierLink requires4- 20mA Actuator)

Included -CRTEMPSNOO1AO0

Included -Not Used

Included -Not Used

Required -33ZCT55SPT

or equivalent

Requires -33CSENTHSW

Requires -33CSENTHSW

or equivalent

NOTES:CO 2 Sensors (Optional):33ZCSENC02 - Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor.

33ZCASPC02 - Aspirator box used for duct-mounted CO 2 room sensor.

33ZCT55C02 - Space temperature and CO2 room sensor with override.33ZCT56C02 - Space temperature and CO2 room sensor with override and setpoint.

Requires -33CSENTSEN

or equivalent

24

Table 4 - Space Sensor Mode

TB1 TERMINAL

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

LEGEND:T55

T56

CCN

CMPSAFE -

FILTER

FIELD CONNECTION INPUT SIGNAL

T55- SEN/T56- SEN Analog (1Okthermistor)

RMTOCC Discrete, 24VAC

T55- SEN/T56- SEN Analog (1Okthermistor)

CMPSAFE Discrete, 24VAC

T56- SET Analog (1Okthermistor)

FSD Discrete, 24VAC

LOOP- PWR Analog, 24VDC

SPS Discrete, 24VAC

IAQ-SEN Analog, 4-20mA

FILTER Discrete, 24VAC

IAQ- COM/OAQ- COM/RH- COM Analog, 4-20mA

CCN + (RED) Digital,, 5VDC

OAQ-SEN/RH-SEN Analog, 4-20mA

CCN Gnd (WriT) Digital, 5VDC

AUX OUT(Power Exhaust) (Output)Discrete 24VAC

CCN - (BLK) Digital, 5VDC

Space Temperature Sensor

Space Temperature SensorCarrier Comfort Network (communication bus)

Compressor Safety

Dirty Filter Switch

FSD - Fire Shutdown

IAQ - Indoor Air Quality (C02)

OAQ- Outdoor Air Quality (C02)

RH - Relative Humidity

SFS - Supply Fan Status

Table 5 - Thermostat Mode

TB1 TERMINAL FIELD CONNECTION INPUT SIGNAL

1 RAT SEN Analog (10k thermistor)

2 G Discrete, 24VAC

3 RAT SEN Analog (1Ok thermistor)

4 Y1 Discrete, 24VAC

5

6 Y2 Discrete, 24VAC

7 LOOP- PWR Analog, 24VDC

8 Wl Discrete, 24VAC

9 IAQ-SEN Analog, 4-20mA

10 W2 Discrete, 24VAC

11 IAQ- COM/OAQ- COM/RH-COM Analog, 4- 20mA

12 CCN + (RED) Digital, 5VDC

13 OAQ - SEN/RH - SEN Analog, 4- 20mA

14 CCN Gnd (WriT) Digital, 5VDC

15 AUX OUT (Power Exhaust) (Output) Discrete 24VAC

16 CCN - (BLK) Digital, 5VDC

LEGEND:

CCN -

G

IAQ -

OAQ -

RAT -

Carrier Comfort Network (communication bus)Thermostat Fan

Indoor Air Quality (C02)

Outdoor Air Quality (C02)

Return Air Temperature

RH - Relative Humidity

Wl - Thermostat Heat Stage 1

W2 - Thermostat Heat Stage 2

Y1 - Thermostat Cool Stage 1

Y2 - Thermostat Cool Stage 2

25

Space Sensors--

The PremierLink controller is factory-shipped confguredfor Space Sensor Mode. A Carrier T-55 or T-56 spacesensor must be used. T-55 space temperature sensorprovides a signal of space temperature to the PremierLinkcontrol. T-56 provides same space temperature signal plusit allows for adjustment of space temperature setpointsfrom the face of the sensor by the occupants.

,C,h

©

\

C08201

CCN COM

SENSOR WIRING

Fig. 41 - T-55 Space Temperature Sensor Wiring

Connect T-55: See Fig. 41 for typical T-55 internalconnections. Connect the T-55 SEN terminals to TB1

terminals 1 and 3 (see Fig. 42).

TB1 PL

C08212

Fig. 42 - PremierLink T-55 Sensor

Connect T-56: See Fig. 43 for T-56 internal connections.Install a jumper between SEN and SET terminals asillustrated. Connect T-56 terminals to TB1 terminals 1, 3

and 5 (see Fig. 44).

SEN S_

oLK(T56) ,_

(n)

o

CCN COM

SENSOR WIRING

JUMPER-_ TERMINALS

AS SHOWN

\ \

\';

Fig. 43 - T-56 Internal Connections

C08202

TB1 PL

TB1 PL

"i.,t-.---j um per

Fig. 44 - PremierLink T-56 SensorC08213

Connect Thermostat --

A 7-wire thermostat connection requires a 24-v powersource and a common connection. Use the R and C

terminals on the CTB's THERMOSTAT connection stripfor these. Connect the thermostat's Y1, Y2, W1, W2 and

G terminals to PremierLink TB1 as shown in Fig. 45.

If the 50TC unit is equipped with factory-installed smokedetector(s), disconnect the factory BLU lead at TB1-6(Y2) before connecting the thermostat. Identify the BLUlead originating at CTB-DDC-1; disconnect at TB1-6and tape oft'. Confirm that the second BLU lead at TB1-6remains connected to PremierLink J4-8.

SPACE CTBTHERMOSTAT THERMOSTAT

(Z) %TB1 PL

CX) -%(E) -D

(EC, -%

Cg> .@THERMOSTAT

Fig. 45 - Space Thermostat ConnectionsC08119

If the 50TC unit has an economizer system and

free-cooling operation is required, a sensor representingReturn Air Temperature must also be connected

(feld-supplied and installed). This sensor may be a T-55

Space Sensor (see Fig. 41) installed in the space or in thereturn duct, or it may be sensor PNO 33ZCSENSAT,installed in the return duct. Connect this sensor to TBI-1

and TB1-3 per Fig. 42.

Configure the Unit for Thermostat Mode --

Connect to the CCN bus using a CCN service tool and

navigate to PremierLink Configuration screen for OperatingMode. Default setting is Sensor Mode (value 1). Change the

value to 0 to reconfigure the controller for Thermostat Mode.

When the PremierLink is configured for ThermostatMode, these functions are not available: Fire Shutdown(FSD), Remote Occupied (RMTOCC), Compressor Safety(CMPSAFE), Supply Fan Status (SFS), and Filter PressureSwitch (FILTER).

26

Economizer Controls

Indoor Air Quality (CO2) Sensor --

The indoor air quality sensor accessory monitors space

carbon dioxide (CO2) levels. This information is used to

monitor IAQ levels. Several types of sensors are available,for wall mounting in the space or in return duct, with and

without LCD display, and in combination with spacetemperature sensors. Sensors use infrared technology to

measure the levels of CO2 present in the space air.

The CO2 sensors are all factory set for a range of 0 to2000 ppm and a linear mA output of 4 to 20. Refer to the

instructions supplied with the CO2 sensor for electricalrequirements and terminal locations. See Fig. 46 for

typical CO2 sensor wiring schematic.

0

0-10VDCCOM

ALARMRELAYCONTACTS

C08635

Fig. 46 - Indoor/Outdoor Air Quality (CO2) Sensor(33ZCSENCO2) - Typical Wiring Diagram

To accurately monitor the quality of the air in theconditioned air space, locate the sensor near a return-air

grille (if present) so it senses the concentration of CO2

leaving the space. The sensor should be mounted in alocation to avoid direct breath contact.

Do not mount the IAQ sensor in drafty areas such as near

supply ducts, open windows, fans, or over heat sources.Allow at least 3 ft (0.9 m) between the sensor and any

corner. Avoid mounting the sensor where it is influencedby the supply air; the sensor gives inaccurate readings if

the supply air is blown directly onto the sensor or if thesupply air does not have a chance to mix with the room airbefore it is drawn into the return airstream.

Wiring the Indoor Air Quality Sensor: For each sensor,use two 2-conductor 18 AWG (American Wire (;age)twisted-pair cables (unshielded) to connect the separateisolated 24 vac power source to the sensor and to connectthe sensor to the control board terminals.

To connect the sensor to the control, identify the positive(4 to 20 mA) and ground (SIC COM) terminals on the

sensor. See Fig. 46. Connect the 4-20 mA terminal toterminal TB1-9 and connect the SIC COM terminal to

terminal TBI-ll. See Fig. 47.

27

IAQ SensorTB1 PL

TB1

24 VAC

C08636

Fig. 47 - Indoor CO 2 Sensor (33ZCSENCO2)Connections

Refer to Form 33SC-68SI, PremierLink Installation,

Start-up, and Configuration Instructions, for detailed

configuration information

Outdoor Air Quality Sensor(PNO 33ZCSENCO2 plus weatherproof enclosure) --

The outdoor air CO2 sensor is designed to monitor carbondioxide (CO2) levels in the outside ventilation air and

/

interface with the ventilation damper in an HVAC system.The OAQ sensor is packaged with an outdoor cover. See

Fig. 48. The outdoor air CO2 sensor must be located in theeconomizer outside air hood.

6 1t2"

4-- 4 1/4" ..................t_

_,q-- 3 3/4" --._,.]

® ®

@©

©

__3, °COVER REMOVED

T

7 _

._--°° 3.5" ....... -I_

QC

OQO

SIDE VIEW

C07135

Fig. 48 - Outdoor Air Quality Sensor Cover

Wiring the Outdoor Air CO2 Sensor: A dedicatedpower supply is required for this sensor. A two-wire cable

is required to wire the dedicated power supply for the

sensor. The two wires should be connected to the powersupply and terminals 1 and 2.

To connect the sensor to the control, identify the positive(4 to 20 mA) and ground (SIC COM) terminals on the

OAQ sensor. See Fig. 46. Connect the 4 to 20 mAterminal to the TB1-13 terminal of the 50TC. Connect theSIC COM terminal to the TBI-ll terminal of the 50TC.

See Fig. 49.

OAQ Sensor/RH SensorTB1 PL

TB1

24 VAC

C08275

Fig. 49 - Outdoor CO 2 Sensor Connections

Space Relative Humidity Sensor or HumidistatConnections i

NOTE: The accessory space relative humidity sensor and

humidistat are not available for size 04-06 single phase

(-3 voltage code) models.

Space Relative Humidity Sensor connections: The

accessory space relative humidity sensor (33ZCSENSRH-01)is installed on an interior wall to measure the relative

humidity of the air within the occupied space.

The use of a standard 2 X 4 inch electrical box to

accommodate the wiring is recommended for installation.

The sensor can be mounted directly on the wall, ifacceptable by local codes.

UNIT DAMAGE HAZARD

Failure to follow this caution may result inpermanent damage to the sensor.

DO NOT clean or touch the sensing element withchemical solvents as they can permanently damagethe sensor.

UNIT PERFORMANCE HAZARD

Failure to follow this caution will result in inaccurate

sensor readings.

DO NOT mount the sensor in drafty areas such as nearheating or air-conditioning ducts, open windows, fans,or over heat sources such as baseboard heaters,radiators, or wall-mounted dimmers. Sensors mountedin those areas will produce inaccurate readings.

If the sensor is installed directly on a wall service, install the

humidity sensor using 2 screws and 2 hollow wall anchors(field supplied). Do not over tighten screws. See Fig. 50.

4>

MOUNTING

J

HO,ES I÷1÷1÷1÷1 W,R,NGo in n o OPENING

/';/ .\

C] ] 084

Fig. 50 - Space Relative Humidity Sensor Installation

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

sensor is properly mounted.Avoid corner locations. Allow at least 4 ft between the

sensor and any corner. Airflow near corners tends to be

reduced, resulting in erratic sensor readings. The sensorshould be vertically mounted approximately 5 ft up from

the floor, beside the space temperature sensor.

For wiring distances up to 500 feet, use a 3-conductor, 18or 20 AWG cable. ACCN communication cable can be

used, although the shield is not required. The shield mustbe removed from the sensor end of the cable if this cable

is used. See Fig. 51 for wiring details.

¢.?<__1co

TB1-7

TB1-13?

C3

Io Vin Gnd Vo

I II II

Fig. 51 - Space Relative Humidity Sensor Connection

The power for the sensor is provided by the PremierLinkcontrol on terminal J5-4 (+33 to +35vdc).

To wire the sensor:

1. At the sensor, remove 4 inches fo the jacket from thecable. Strip ¼ inch of insulation from each conductor.

Route the cable through the wire clearance opening in

the center of the sensor. See Fig. 50.

2. Connect a field-supplied BLACK wire to the sensorscrew terminal marked Vin.

3. Connect a field-supplied RED wire into the sensorscrew terminal marked Io.

4. Connect the field-supplied RED wire from the sensorto TBI-13.

5. Connect the field-supplied BLACK wire from thesensor to TB1-7.

Smoke Detector/Fire Shutdown (FSD) i

This function is available only when PremierLink isconfigured for (Space) Sensor Mode. The unit is

factory-wired for PremierLink FSD operation whenPremierLink is factory-installed.

On 50TC units equipped with factory-installed Smoke

Detector(s), the smoke detector controller implements theunit shutdown through its NC contact set connected to the

unit's CTB input. The FSD function is initiated via thesmoke detector's Alarm NO contact set. The PremierLink

communicates the smoke detector's tripped status to the

CCN building control. See Fig. 38 or Fig. 39(PremierLink wiring schematic).

28

Filter Status Switch i

This function is available only when PremierLink isconfigured for (Space) Sensor Mode.

PremierLink control can monitor return filter status in two

ways: By monitoring a field-supplied/installed filterpressure switch or via supply fan runtime hours.

Using switch input: Install the dirty filter pressure switch

according to switch manufacturer's instructions, tomeasure pressure drop across the unit's return filters.Connect one side of the switch's NO contact set to CTB'sTHERMOSTAT-R terminal. Connect the other side of the

NO contact set to TBI-10. Setpoint for Dirty Filter is setat the switch. See Fig. 52

Filter Switch (NO, close on rising pressure (high drop))

CTBThermostat

TB1 PL

--o D <EE>C08216

Fig. 52 - PremierLink Filter Switch Connection

When the filter switch's NO contact set closes as filter

pressure drop increases (indicating dirt-laden filters), the

input signal to PremierLink causes the filter status point toread "DIRTY".

Using Filter Timer Hours: Refer to Form 33SC-68SI for

instructions on using the PremierLink Configuration

screens and on unit alarm sequence.

Supply Fan Status Switch i

The PremierLink control can monitor supply fan operationthrough a field-supplied/installed differential pressure

switch. This sequence will prevent (or interrupt) operationof unit cooling, heating and economizer functions until

the pressure switch contacts are closed indicating propersupply fan operation.

Install the differential pressure switch in the supply fan

section according to switch manufacturer's instructions.Arrange the switch contact to be open on no flow and to

close as pressure rises indicating fan operation.

Connect one side of the switch's NO contact set to CTB'sTHERMOSTAT-R terminal. Connect the other side of the

NO contact set to TB1-8. Setpoint for Supply Fan Statusis set at the switch. See Fig. 53.

Fan (Pressure) Switch (NO, close on rise in pressure)CTB

Thermostat

o []

L_o- TB1 PL--o [] <EE>

C08118

Fig. 53 - PremierLink Wiring Fan Pressure SwitchConnection

Remote Occupied Switch i

The PremierLink control permits a remote timeclock tooverride the control's on-board occupancy schedule and

place the unit into Occupied mode. This function may alsoprovide a "Door Switch" time delay function that will

terminate cooling and heating functions after a 2-20

minute delay.

Connect one side of the NO contact set on the timeclock

to CTB's THERMOSTAT-R terminal. Connect the otherside of the timeclock contact to the unit's TB1-2 terminal

(see Fig. 54).

Remote Occupied CTBThermostat

_E--o []

TB1Time Clock T 0

C08214

Fig. 54 - PremierLink Wiring Remote Occupied

Refer to Form 33SC-68SI for additional information on

configuring the PremierLink control for Door Switchtimer function.

Power Exhaust (output) i

Connect the accessory Power Exhaust contactor coils(s)per Fig. 55.

Power Exhaust

_TAN

TB1 PL

D < >CTB

THERMOSTAT

GRA F_

C08120

Fig. 55 - PremierLink Power Exhaust OutputConnection

NOTE: The Power Exhaust and Humidi-MiZer (n_optionscan not be used with PremierLink at the same time as both

options require connection at TBI-15 (AUX OUT).

CCN Communication Bus i

The PremierLink controller connects to the bus in a daisychain arrangement. Negative pins on each component

must be connected to respective negative pins, andlikewise, positive pins on each component must be

connected to respective positive pins. The controllersignal pins must be wired to the signal ground pins.

Wiring connections for CCN must be made at the 3-pin

plug.

At any baud (9600, 19200, 38400 baud), the number of

controllers is limited to 239 devices maximum. Bus length

may not exceed 4000 ft, with no more than 60 totaldevices on any 1000-fl section. Optically isolated RS-485

repeaters are required every 1000 ft.

NOTE: Carrier device default is 9600 band.

29

Communications Bus Wire Specifications: The CCNCommunication Bus wiring is field-supplied andfield-installed. It consists of shielded 3-conductor cable

with drain (ground) wire. The cable selected must beidentical to the CCN Communication Bus wire used forthe entire network.

See Table 6 for recommended cable.

Table 6 - Recommended Cables

MANUFACTURER CABLE PART NO.

Alpha 2413 or 5463

American A22503

Belden 8772

Columbia 02525

NOTE: Conductors and drain wire must be at least 20

AWG, stranded, and tinned copper. Individual conductors

must be insulated with PVC, PVC/nylon, vinyl, Teflon, or

polyethylene. An aluminum/polyester 100% foil shield and

an outer jacket of PVC, PVC/nylon, chrome vinyl, or Teflon

with a minimum operating temperature range of -20°C to

60°C is required. Do not run communication wire in the

same conduit as or next to any AC voltage wiring.

The communication bus shields must be tied together ateach system element. If the communication bus is entirely

within one building, the resulting continuous shield mustbe connected to ground at only one single point. If the

communication bus cable exits from one building andenters another building, the shields must be connected to

the grounds at a lightning suppressor in each building (one

point only).

Connecting CCN bus:

NOTE: When connecting the communication bus cable,

a color code system for the entire network is

recommended to simplify installation and checkout. SeeTable 7 for the recommended color code.

Table 7 - Color Code Recommendations

CCN BUS WIRE CCN PLUG PINSIGNAL TYPE

COLOR NUMBER

+ Red 1

Ground White 2

- Black 3

Connect the CCN (+) lead (typically RED) to the unit's

TBI-12 terminal. Connect the CCN (ground) lead(typically WHT) to the unit's TBI-14 terminal. Connect

the CCN (-) lead (typically BLK) to the unit's TBI-16

terminal. See Fig. 56.

CCN Bus

TB1 PL

+ (RED) "D

TB1

GND (WHT) '[l"_m

TB1

C08276

Fig. 56 - PremierLink CCN Bus Connections

30

RTU Open Control System

The RTU Open control is factory-mounted in the 50TCunit's main control box, to the left of the CTB. See

Fig. 58 (or Fig. 59). Factory wiring is completed throughharnesses connected to the CTB. Field connections for

RTU Open sensors will be made at the Phoenix connectors

on the RTU Open board. The factory-installed RTU Opencontrol includes the supply-air temperature (SAT) sensor.

The outdoor air temperature (OAT) sensor is included inthe FIOP/accessory EconoMi$er2 package.

The RTU Open controller is an integrated component of theCarrier rooftop unit. Its internal application programming

provides optimum performance and energy efficiency. RTUOpen enables the unit to run in 100% stand-alone control

mode, Carrier's I-Vu Open network, or a Third PartyBuilding Automation System (BAS). On-board DIP

switches allow you to select your protocol (and baud rate) ofchoice among the four most popular protocols in use today:

BACnet, Modbus, Johnson N2 and LonWorks. (See Fig. 57.)

Refer to Table 8, RTU Open Controller Inputs and Outputsfor locations of all connections to the RTU Open board.

J3

O O O

_- o o o_: _5"_ _5"_ _5"_i _ _ _

0_ 0 o> 0 o_ 0 co

J5

J22VFD Output

3-VoltLithium

Battery

Jll_] BO-6

(H) Humidimizer

BOW

(Reversing Valve/HighSpeed Fan/Y3)

BO-8

Power Exhaust)

LonWorks

Option CardPort

Example set forBACnet MS/TPand 76.8K baud

(1, 2, and 4 ON)Recommended for all

i-Vu Open installationsProtocol Selector *Remove SPT (temp input) BACnet, Modbus, or N2

both for 0-5V SPT (common) (LON connection J15)

SPT (offset input)

Fig. 57 - RTU Open Multi-Protocol Control BoardC14129

31

I,D

tll

©

9=.

-7

JL Plr-m r-m _.i_

CONPONEHTARRAN EWEHT H I)OM RESSORSHOWN

NOTES: I TERMINAL HOARD SCHEMATIC LAYOUT DOES NOT WATCH ACTUAL TERMINAL HOARDTO SIMPLIFY CIRCUIT TRACES

2 El@SUREDESIGNATEI)JUMPERS ON TERMIkAL HOARD ARE CUT WUE_ AI)DINGSMOKEDETECTORS, PHASE LOSS RELAY, OCCUPANCY AND REMOTE SHUTDOWN

3 FOR SINGLE STAGE ELECTRIC HEAT OPTION, MOVE VIOLET HEATER WIRE FROM THR-VIOLETWIRE TO TH4-ORANGE WIRE

TI)4LOCATED Ik HEAT SECTIO'IIFC OCCURS WITHOUT DIRECT DRIVE ONLY

R MARHED WIHE:<_[_- EHTH SEHSR LO (FROM TERM HI)ECOH LO)

JO _ L::J + d

@ _, OPTIO_ _ L ..... _ (OR )

R_I ........ _ i L_LJ R I I IO

,RV-- RRLAYS_ :_I | : I CZ_-,Eo-o_,H-_III I q(D->>-O_N ' W.T[] <z>>>_;"_ I I ,L_..... Fmmmm_ _ _ _!1_

..... _R<:z>->>-v,_ ! ' IS_ ,17-II 1171_ET+.... -_ I 8 {_)-P'I_ -- ' _ I 8........ _RI_I _ __ .m-- !,!,'-P_l .......... l_RHLH.... _ -ff>¢I'' _->>-°"'_ -- ;_ _i£1%Ht.........J /

_111 m+>-o._ i ,W:-<I cb'l-_'_ / €11 '",,' R_;"Ro_ _t_l: _ ! I_L_#--.%._A! I]_'.'

EXH I ", P, L_ ---_% _ , E_THALRY °"I _ 'I,,, _-___ __,F,OR,,RCESSOR,,

........ _ TRM_rROMPOWERSCHEMATIC

/ I "1 ' : : IT_Z_qUl_,.\ {J_FBLU_)LBLUt / / /_J _BR_ -- _CO_T_OL_

1:_1...... _1 ,_o,,._@,,,>,d / / i bF" r.<..............1I_.1 .... ! ! :1 :;..-@t:_,*>A_,4 , / / I .o_;;_,,,.-_:],,,

CONTROL; ..... Ir._o I I _RA SR,-- or'o;v .... I vL°_'1 I I I,UM,,,, 1111 I "'"---:_,,'1-- r_;,:,,,--o-_ I I,KHy"'01JJoI,!,-_._ o1J_o!:L

NK r LD _J_Jt ' : ' ................................ l.s4': _u_u_UUl. : ........................ : I_IIER _1 NG Io_ r . ' . ' ' '/ ' : : ' '

.... _.,_ I : ::::: ::::::::::::::::::::::::::: _ I IB_ _ .......... :-_- -; : ........ ; ...... :-- : : .... ---

DDC :--. ............ :.............. ,....... : ;. {:___s m: _ BR_-- Cd ,[_@A,II_:1. ...................... .... t_,__' I ,...._:.....; I-_., _<-C_-I .... _-i-Z I : . _ ' , ...... t-{[_ Ir_C]C_BRN_} CLolt[_B_

, I _ ,I.._, I: I__'_L_J I ' : ; ,- ............... : : :l_D-b.?-vmJ I/ _--_'"_

r;<,_o_. r:q / Fo. _.'_1: U_: : : : : ::: :I_LI:Z:ZJI;; ::-_4:" '_tl_}}_:_tql

.... I ') I/I ...... / I-,- _<-$-1-:--:-_4-_1: : : : : : :[T_S_G I'q_'-ff'T_'q_'_lll lit'_,_'lll_ I_ I_[ 7 L_L, _ec_.l.:....Jt_r .............. : ...... .: : IE,_I I ,,', ,:,f_,'o_,'o_ II_tL.L"" II:: I_M I ._, I_I: ...........:: ...... :: :Iti I _I_ " I'.¢_ I" I)°I _ I ', .*:__I'!:_ : i:i : :[._! II I ]_'_1 is,: ........ ::.................. >= .... _,: i_ II _['e_> ]i{::::.:::::::::. : ! : : :::: ' _: _---I .......... B©QO_ o>It__ , I _,, le::b- . : : : , , ,@ o_-, ....................... .....• _11°" _ "_ : _ _:_:_:':'__ _:_:_:_-_• , ::_::.............. : I I I!lil!i!i!ll I ?t7 ooc _ o_

" _ '<_-_""_FI _ I ......... _ otttSt

2

I

©t_

t_

w

.Z

I

b_t_

2

g

Table 8 - RTU Open Controller Inputs and Outputs

CONNECTION PIN LBACnet OBJECT TYPE OF I/O CHANNEL DESIGNATION

POINT NAME NAME NUMBER(S)

DEDICATED INPUTS

Space Temp / Zone Temp zone temp AI (10K Thermistor) J20-1 & 2 Analog Input 10

Supply Air Temperature sa temp AI (10K Thermistor) J2-1 & 2 Analog Input 6

Outside Air Temperature ca temp AI (10K Thermistor) J2- 3 & 4 Analog Input 7

Space Temperature Offset Pot stpt adj offset AI (100K Potentiometer) J20- 3 & 4 Analog Input 11

Safety Chain Feedback safety status BI (24 VAC) J1 -g Binary Input 4

Compressor Safety Status (1) comp status BI (24 VAC) J1-2 Binary Input 3

Fire Shutdown Status firedown status BI (24 VAC) J1 - 10 Binary Input 5

Enthalpy Status enthalpy status BI (24 VAC) J2-6 & 7 Binary Input 8

Humidistat Input Status humstat status BI (24 VAC) J5-7 & 8 Binary Input g

Zone Temperature n/a n/a J13-1 - 4 Rnet

CONFIGURABLE INPUTS (4)

Indoor Air CO2

Outdoor Air CO2

Space Relative Humidity

Supply Fan Status (2)

Filter Status (2)

Door Contact (2)

Remote Occupancy input (2)

IGC input (2)

Economizer Output

Supply Fan VFD

Supply Fan Relay

Cool 1 Relay State

Cool 2 Relay State

Cool 3 Relay State

Heat 1 Relay State

Heat 2 Relay State

Power Exhaust Relay State

Dehumidification Relay

LEGEND

AI - Analog InputAO - Analog OutputDI - Discrete InputDO - Discrete Output

iaq

oaq

space rh

sfan status

filter status

door contact status

occ contact status

igcovrstatus

AI (4-20 mA)

AI (4-20 mA)

AI (4-20 mA)

BI (24 VAC)

BI (24 VAC)

BI (24 VAC)

BI (24 VAC)

BI (24 VAC)

J4-2 & 3 or J4-5 & 6

J5-1 &2or J5-3 & 4,J5-5 & 6 or J5-7 & 8 (3)

Analog Input 2

Analog Input 1

Analog Input 10

Binary Input 3, 5, 8, or 9, except where intrinsic input is used

Binary Input 3, 5, 8, or 9, except where intrinsic input is used

Binary Input 3, 5, 8, or 9, except where intrinsic input is used

Binary Input 3, 5, 8, or 9, except where intrinsic input is used

Binary Input 9. Mandatory input on gas heat units.

OUTPUTS

econ output AO (4-20mA) J2-5 Analog Output 1

vfd output AO (2-10Vdc) J22-1 & 2 Analog Output 2

sfan BO Relay (24VAC, 1A) J1-4 Binary Output 1 (G)

comp 1 BO Relay (24VAC, 1A) J1-8 Binary Output 5 (Y1)

comp 2 BO Relay (24VAC, 1A) J1-7 Binary Output 4 (Y2)

comp 3 BO Relay (24VAC, 1A) J11-5 & 6 Binary Output 7 (Y3)

heat 1 BO Relay (24VAC, 1A) J1 - 6 Binary Output 3 (W1)

heat 2 BO Relay (24VAC, 1A) J1-5 Binary Output 2 (W2)

pexh BO Relay (24VAC, 1A) J11-2 & 3 (N.O.) Binary Output 8 (PE)

dehum BO Relay (24VAC, 1A) J11-7 & 8 (N.O.) Binary Output 6

* These inputs (if installed) take the place of the default input on the specific channel according to schematic.Parallel pins J5-1 = J2-6, J5-3 = J1-10, J5-5 = J1-2 are used for field-installation.

The RTU Open controller requires the use of a Carrierspace sensor. A standard thermostat cannot be used with

the RTU Open system.

Supply Air Temperature (SAT) Sensor --

On FIOP-equipped 50TC unit, the unit is supplied with asupply-air temperature (SAT) sensor (33ZCSENSAT).This sensor is a tubular probe type, approx 6-inches (152mm) in length. It is a nominal 10-k ohm thermistor.

The SAT is factory-wired. The SAT probe is wire-tied to

the supply-air opening (on the horizontal opening end) in

its shipping position. Remove the sensor for installation.Re-position the sensor in the flange of the supply-air

opening or in the supply air duct (as required by localcodes). Drill or punch a 1/2-in. hole in the flange or duct.

Use two field-supplied, self-drilling screws to secure thesensor probe in a horizontal orientation. See Fig. 40.

Outdoor Air Temperature (OAT) Sensor --

The OAT is factory-mounted in the EconoMi$er2 (FIOPor accessory). It is a nominal 10k ohm thermistor attached

to an eyelet mounting ring.

EconoMiSer2 --

The RTU Open control is used with EconoMi$er2 (optionor accessory) for outdoor air management. The damper

position is controlled directly by the RTU Open control;EconoMi$er2 has no internal logic device.

Outdoor air management functions can be enhanced with

field-installation of these accessory control devices:

Enthalpy control (outdoor air or differential sensors)

Space CO2 sensor

Outdoor air CO2 sensor

34

Field Connections @ .[_'7q

Field connections for accessory sensors and input devicesare made the RTU Open, at plugs J1, J2, J4, J5, Jll andJ20. All field control wiring that connects to the RTUOpen must be routed through the raceway built into thecorner post as shown in Fig. 26. The raceway provides theUL required clearance between high- and low-voltagewiring. Pass the control wires through the hole provided inthe corner post, then feed the wires thorough the racewayto the RTU Open. Connect to the wires to the removablePhoenix connectors and then reconnect the connectors tothe board.

Space Temperature (SPT) Sensors i

There are two types of SPT sensors available from Carrier,resistive input non-communicating (T55, T56, and T59)

and Rnet communicating (SPS, SPPL, SPR and SPPF)sensors. Each type has a variety of options consisting of:

timed override button, set point adjustment, a LCDscreen, and communication tie in. Space temperature can

be also be written to from a building network or zoning

system. However, it is still recommended that return airduct sensor be installed to allow stand-alone operation for

back-up. Refer to the configuration section for details oncontroller configurations associated with space sensors.

• 33ZCT55SPT, space temperature sensor with override

button

• 33ZCT56SPT, space temperature sensor with override

button and setpoint adjustment

• 33ZCT59SPT, space temperature sensor with LCD

(liquid crystal display) screen, override button, and

setpoint adjustment

Use 20 gauge wire to connect the sensor to the controller.

The wire is suitable for distances of up to 500 ft. Use a

three-conductor shielded cable for the sensor and setpointadjustment connections. If the setpoint adjustment

(slidebar) is not required, then an unshielded, 18 or 20gauge, two-conductor, twisted pair cable may be used.

Connect T-55: See Fig. 41 for typical T-55 internalconnections. Connect the T-55 SEN terminals to RTU

Open J20-1 and J20-2. See Fig. 60.

C08460

Fig. 60 - RTU Open T-55 Sensor Connections

Connect T-56: See Fig. 43 for T-56 internal connections.Install a jumper between SEN and SET terminals asillustrated. Connect T-56 terminals to RTU Open J20-1,J20-2 and J20-3 per Fig. 61.

"!'_---Jumper

C08461

Fig. 61 - RTU Open T-56 Sensor Connections

Connect T-59: The T-59 space sensor requires aseparate, isolated power supply of 24 VAC. See Fig. 62for internal connections at the T-59. Connect the SEN

terminal (BLU) to RTU Open J20-1. Connect the COM

terminal (BRN) to J20-2. Connect the SET terminal (STO

or BLK) to J20-3.

BLK (STO)

BRN (COM)

BLU (SPT)II

i I

OR SET SEN

O O O

OPB COM- PWR+

o??/I I

/ I

II 24 VAC

J20-3

J20-2 SENSORWIRING

J20-1

POWERWIRING

NOTE: Must use a separate isolated transformer.

C10291

Fig. 62 - Space Temperature Sensor Typical Wiring

(33ZCT59SPT)

Indoor Air Quality (CO2) Sensor i

The indoor air quality sensor accessory monitors space

carbon dioxide (CO2) levels. This information is used tomonitor IAQ levels. Several types of sensors are available,

for wall mounting in the space or in return duct, with andwithout LCD display, and in combination with space

temperature sensors. Sensors use infrared technology tomeasure the levels of CO2 present in the space air.

The CO2 sensors are all factory set for a range of 0 to2000 ppm and a linear mA output of 4 to 20. Refer to theinstructions supplied with the CO2 sensor for electricalrequirements and terminal locations. See Fig. 46 fortypical CO2 sensor wiring schematic.

To accurately monitor the quality of the air in the

conditioned air space, locate the sensor near a return-airgrille (if present) so it senses the concentration of CO2

leaving the space. The sensor should be mounted in alocation to avoid direct breath contact.

35

Do not mount the IAQ sensor in drafty areas such as nearsupply ducts, open windows, fans, or over heat sources.Allow at least 3 ft (0.9 m) between the sensor and anycorner. Avoid mounting the sensor where it is influencedby the supply air; the sensor gives inaccurate readings ifthe supply air is blown directly onto the sensor or if thesupply air does not have a chance to mix with the room airbefore it is drawn into the return airstream.

Wiring the Indoor Air Quality Sensor: For each sensor,

use two 2-conductor 18 AWG (American Wire Gage)twisted-pair cables (unshielded) to connect the separate

isolated 24 vac power source to the sensor and to connectthe sensor to the control board terminals.

To connect the sensor to the control, identify the positive(4 to 20 mA) and ground (SIG COM) terminals on thesensor. See Fig. 46. Connect the 4-20 mA terminal toRTU Open J4-2 and connect the SIG COM terminal toRTU Open J4-3. See Fig. 63.

IAQ Sensor

24 VAC

C08462

Fig. 63 - RTU Open / Indoor CO 2 Sensor(33ZCSENCO2) Connections

Outdoor Air Quality Sensor(PNO 33ZCSENCO2 plus weatherproof enclosure) i

The outdoor air CO2 sensor is designed to monitor carbondioxide (CO2) levels in the outside ventilation air andinterface with the ventilation damper in an HVAC system.The OAQ sensor is packaged with an outdoor cover. SeeFig. 48. The outdoor air CO2 sensor must be located in theeconomizer outside air hood.

Wiring the Outdoor Air CO 2 Sensor: A dedicated

power supply is required for this sensor. A two-wire cableis required to wire the dedicated power supply for the

sensor. The two wires should be connected to the powersupply and terminals 1 and 2.

To connect the sensor to the control, identify the positive

(4 to 20 mA) and ground (SIG COM) terminals on theOAQ sensor. See Fig. 46. Connect the 4 to 20 mA

terminal to RTU Open J4-5. Connect the SIG COM

terminal to RTU Open J4-6. See Fig. 64

OAQ Sensor

<gig> .17 24 VAC

C11086

Fig. 64 - RTU Open / Outdoor CO 2 Sensor(33ZCSENCO2) Connections

Space Relative Humidity Sensor or Humidistat i

NOTE: The accessory space relative humidity sensor and

humidistat are not available for size 04-06 single phase

(-3 voltage code) models.

Humidi-MiZer _n_ Control Wiring: In units equipped

with the Humidi-MiZer option there are two pink (PNK)wires loose in the control box used to control the

dehumidification function of the unit. These pink wiresare meant to be tied to a space humidistat or thermidistat

on an electromechanical unit. On RTU Open equipped

units these pink wires must be connected to Jll-7 & 8 toallow the Open board to operate the dehumidification

function for the unit. Disconnect the Jll Phoenix styleconnector from the board and use the plug screws to

secure the pink wires in pins 7 and 8, reconnect the plugto the board at Jll.

NOTE: The Humidi-MiZer is a factory installed option

which is available for 07 models only.

Relative Humidity Sensors (Space or Duct Mounted):

The accessory space humidity sensor (33ZCSENSRH-01)or duct humidity sensor (33ZCSENDRH-01) is used to

measure the relative humidity of air within the space or

return air duct. The RH reading is used to control theHumidi-MiZer option of the rooftop unit. For wiring

distances up to 500 ft (152 m), use a 3-conductor, 18 or20 AWG shielded cable. The shield must be removed

from the sensor end of the cable and grounded at the unit

end. The current loop power for sensor is provided by theRTU Open controller as 24vdc. Refer to the instructions

supplied with the RH sensor for the electricalrequirements and terminal locations. RTU Open

configurations must be changed after adding an RHsensor. See Fig. 65 and 66 for typical RH sensor wiring.

• J4-1 or J4-4 = 24vdc loop power

• J4-2 or J4-5 = 4-20mA signal input

NOTE: The factory default for dehumidification control

is normally open humidistat.

JMOUNTING

HOLES

\

/'y

SW2

WIRINGt OPENING

\

x

Vin - J4-1 or J4-4 24VdcIo - J4-2 or J4-5 -20mA output

C11087

Fig. 65 - Space Relative humidity Sensor Typical Wiring

36

J4-1 or J4-4 + 24 VDC Supply Voltage

J4-2 or J4-5 (-)4 to 20 mA Current Loop Outputto RTU Open

Relative Humidity Sensor(Polarized Male Connector)

Fig. 66 - Duct Relative Humidity Sensor Typical WiringC12756

Humidistat: The accessory humidistat provides the RTUOpen insight to the relative humidity in the space. Thehumidistat reads the RH level in the space and compares itto its setpoint to operate a dry contact. The humidistat is adedicated input on the configurable input 9 and tells theRTU Open when the RH level is HIGH or LOW. Thenormal condition for humidity is LOW. A normally openhumidistat is the factory default control for theHumidi-MiZer <n>option.To wire in the field:

• J5-8 = 24 VAC source for dry contact

• J5-7 = Signal input

Smoke Detector/Fire Shutdown (FSD) i

On 50TC units equipped with factory-installed Smoke

Detector(s), the smoke detector controller implements theunit shutdown through its NC contact set connected to the

unit's CTB input. The FSD function is initiated via thesmoke detector's Alarm NO contact set. The RTU Open

controller communicates the smoke detector's tripped

status to the BAS building control. See Fig. 58 or Fig. 59(RTU Open System Control wiring schematics).

The Fire Shutdown Switch configuration,

MENU-_onfig-_nputs-4nput 5, identifies the normallyopen status of this input when there is no fire alarm.

Connecting Discrete Inputs i

Filter Status: The filter status accessory is afield-installed accessory. This accessory detects pluggedfilters. When installing this accessory, the unit must beconfigured for filter status by settingMENU-.,Config-_Inputs-,input 3, 5, 8, or 9 to FilterStatus and normally open (N/O) or normally closed (N/C).Input 8 or 9 is recommended for easy of installation. Referto Fig. 57 and Fig. 58 or Fig. 59 for wire terminations at J5.

Fan Status: The fan status accessory is a field-installedaccessory. This accessory detects when the indoor fan is

blowing air. When installing this accessory, the unit must beconfigured for fan status by setting

MENU-,'Config-_nputs-*input 3, 5, 8, or 9 to Fan Status

and normally open (N/O) or normally closed (N/C). Input 8or 9 is recommended for easy of installation. Refer to Fig.

57 and Fig. 58 or Fig. 59 for wire terminations at J5.

Remote Occupancy: The remote occupancy accessory isa field-installed accessory. This accessory overrides the

unoccupied mode and puts the unit in occupied mode.When installing this accessory, the unit must be

configured for remote occupancy by settingMENU-_Config-_Inputs-.qnput 3, 5, 8, or 9 to Remote

Occupancy and normally open (N/O) or normally closed

(N/C).

Also set MENU-_.Schedules-_occupuncy source to DIon/off. Input 8 or 9 is recommended for easy of

installation. Refer to Fig. 57 and Table 8 for wireterminations at J5.

Power Exhaust (output): The relay used by the RTU

Open board to control power exhaust is a dry contactwhich means it does not have 24vac. This 24vac must be

connected to the relay to allow it to operate the powerexhaust relay in the PE accessory. A 24vac source must be

provided to Jll-2 on the RTU Open control board. Thiscan be provided by the unit's transformer from various

sources. The "R" terminal on the unit's low voltageterminal board (LVTB) is a logical source. Refer to Fig.

57 and Fig. 58 or Fig. 59 for wire terminations at Jll.

37

Communication Wiring - Protocols

General --

Protocols are the communication languages spoken bycontrol devices. The main purpose of a protocol is tocommunicate information in the most efficient method

possible. Different protocols exist to provide different

kinds of information for different applications. In the BASapplication, many different protocols are used, depending

on manufacturer. Protocols do not change the function of

a controller; just make the front end user different.

The RTU Open can be set to communicate on fourdifferent protocols: BACnet, Modbus, N2, and LonWorks.

Switch 3 (SW3) on the board is used to set protocol andbaud rate. Switches 1 and 2 (SWl and SW2) are used to

set the board's network address. See Fig. 67 and 68 forprotocol switch settings and address switches. The 3rd

party connection to the RTU Open is through plug J19.See Fig. 69 for wiring.

NOTE: Power must be cycled after changing the SW1-3

switch settings.

Refer to the RTU Open v3 Integration Guide for more

detailed information on protocols, 3rd party wiring, and

networking.

PROTOCOL

BACnet MS/TP(Master)

Modbus(Slave)

N2

(Slave)

LonWorks

DS8 DS7 DS4 DS1

Unused OFF ON Select Baud

Unused OFF ON Select Baud

Unused OFF ON OFF

Unused ON ON ON

NOTE:

DS = Dip SwitchBACnet MS/TP SW3 example shown

DS3

OFF

OFF

ON

OFF

Baud Rate Selections

BAUD RATE DS2 DSl

96OO OFF OFF

19,2OO ON OFF

38,4OO OFF ON

76,800 ON ON

SW3 Protocol

DS6

OFF

OFF

OFF

ON

Selection

DS5

OFF

ON

OFF

OFF

O_t_ S_ t_ N;STP_Jnu_d Pert (m_r}

DS2

Select Baud

Select Baud

OFF

OFF

3&4__Jd

Fig. 67 - RTU Open SW3 Dip Switch Settings

C07166

Fig. 68 - RTU Open Address SwitchesC10815

Fig. 69 - Network WiringC10816

38

Local Access

Wall Mounted Equipment Touch

The Equipment Touch is a wall mounted interface used to

connect to the RTU Open to access the controlinformation, read sensor values, and maintenance. This is

an accessory interface that does not come with the RTU

Open controller. You wire the Equipment Touch to theRTU Open's J13 local access port. There are 2 password

protected levels in the display (User and Admin). See the

Equipment Touch Installation and Setup Guide for moreinformation. See Appendix A for navigation and screencontent.

Field Assistant

Field Assistant is a computer program included with thepurchase of the Tech Tool Kit (USB-TKIT). This is a field

Tech Tool to set-up, service, or download applicationsoftware to the RTU Open controller and includes a USB

Link Cable. The link cable connects a USB port to the J12

local access port. The Field Assistant's menu structure issimilar and functions the same as i-Vu <_>.See Fig. 70.

RTU Open Troubleshooting i

Conmmnication LEDs: The LEDs indicate if the

controller is speaking to the devices on the network. TheLEDs should reflect communication traffic based on the

baud rate set. The higher the baud rate the more solid theLEDs will appear. See Table 9.

Connect to

computer'sUSB port

USB Link Kit

Connect tothe Local

Access port

Fig. 70 - PC Running Field Assistant

RTU Open

C14131

39

Table 9 - LEDs

The LEDs on the RTU Open show the status of certain functions

If this LED is on... Status is...

Power The RTU Open has power

Rx The RTU Open is receiving data from the network segment

Tx The RTU Open is transmitting data over the network segment

BO# The binary output is active

The Run and Error LEDs indicate control module and network status

If Run LED shows... And Error LED shows... Status is...

2 flashes per second Off Normal

2 flashes per second 2 flashes, alternating with Run LED Five minute auto-restart delay after system error

2 flashes per second 3 flashes, then off Control module has just been formatted

2 flashes per second 4 flashes, then pause Two or more devices on this network have thesame MSTP network address

2 flashes per second On Exec halted after frequent system errors orcontrol programs halted

5 flashes per second On Exec start-up aborted, Boot is running

5 flashes per second Off Firmware transfer in progress, Boot is running

7 flashes per second 7 flashes per second, alternating with Ten second recovery period after brownoutRun LED

14 flashes per second 14 flashes per second, Brownoutalternating with Run LED

On On Failure. Try the following solutions:• Turn the RTU Open off, then on.• Format the RTU Open.• Download memory to the RTU Open.• Replace the RTU Open.

NOTE: Refer to the RTU Open Multi-Protocol Controller

Controls, Start-Up, Operation and Troubleshooting manual

for complete configuration of RTU Open, operating

sequences and troubleshooting information. Refer to the

RTU Open v3 Integration Guide for details on configuration

and troubleshooting of connected networks. Have a copy of

these manuals available at unit start-up

Outdoor Air Enthalpy Control

(PNO 33CSENTHSW)

The enthalpy control (33CSENTHSW) is available as afield-installed accessory to be used with the EconoMi$er2

damper system. The outdoor air enthalpy sensor is part of

the enthalpy control. (The separate field-installedaccessory return air enthalpy sensor (33CSENTSEN) is

required for differential enthalpy control. See Fig. 71.)

Locate the enthalpy control in the economizer next to theActuator Motor. Locate two GRA leads in the factory

harness and connect the gray lead labeled "ESL" to theterminal labeled "LOW". See Fig. 71. Connect the enthalpy

control power input terminals to economizer actuator powerleads RED (connect to 24V) and BLK (connect to GND).

EnthalpySwitch

GRA OTBEOONt t_l (P'LINK: to J4-2) or

(RTU Open: to J2-6)Factory Wiring Harness

Cl1160

Fig. 71 - Enthalpy Switch (33CSEN3_SW) Connections

The outdoor enthalpy changeover setpoint is set at the

enthalpy controller.

Differential Enthalpy Control --

Differential enthalpy control is provided by sensing andcomparing the outside air and return air enthalpy

conditions. Install the outdoor air enthalpy control as

described above. Add and install a return air enthalpysensor.

40

Return Air Enthalpy Sensor i

Mount the return-air enthalpy sensor (33CSENTSEN) inthe return-air section of the economizer. The return air

sensor is wired to the enthalpy controller(33CSENTHSW). See Fig. 72.

__ -4-20 @-[-RED

Main _r_ BL K

+ ;uDtC t_-'X_ GRA._F_ CTBECO_

x2222/ I -- L_I (P'LINK: to J4-2) or

Outside Airwitc h (RTU Open: to J2-6)

sI Lit- + 24-36 Return AirI I VDC In Enthalpy

- 4-20 Main Sensor

I outCl1161

Fig. 72 - Outside and Return Air Enthalpy Sensor

Wiring

Smoke Detectors

Smoke detectors are available as factory-installed options on50TC models. Smoke detectors may be specified for Supply

Air only or for Return Air without or with economizer or incombination of Supply Air and Return Air. All components

necessary for operation are factory-provided and mounted.The unit is factory-configured for immediate smoke detector

shutdown operation; additional wiring or modifications to

unit terminal board may be necessary to complete the unitand smoke detector configuration to meet project

requirements.

Units equipped with factory-optional Return Air smoke

detectors require a relocation of the sensor module at unit

installation. See Fig. 73 for the as shipped location.

Return AirSmoke Detector

(as shipped)

.

C12282

Fig. 73 - Return Air Smoke Detector, Shipping Position

Completing Installation of Return Air Smoke Sensor:

1. Unscrew the two screws holding the Return AirSmoke Detector assembly. See Fig. 74, Step 1. Savethe screws.

2. Turn the assembly 90 and then rotate end to end.Make sure that the elbow fitting is pointing down. See

Fig. 74, Step 2.

3. Screw the sensor and detector plate into its operatingposition using screws from Step 1. See Fig. 74, Step 3.

4. Connect the flexible tube on the sampling inlet to the

sampling tube on the basepan.

Additional Application Data i

Refer to Catalog No. HKRNKA-1XA for discussions onadditional control features of these smoke detectors

including multiple unit coordination.

€_--o

Step 1 Step 2

c

o

Step 3

C12283

Fig. 74 - Completing Installation of Return Air Smoke Sensor

41

Table 10 - Unit Wire/Fuse or HACR Breaker Sizing Data

I

I- _. IFM

" TYpEoz

STD

gi

g

MED

CRHEATER***A00

o_

to

gio?g

eq

ELEC. HTR NO C.O. or UNPWR C.O, w/PWRD C.O,

Nom FLA(kW)

NONE - -

1OtA 3,3/4.4 15.9/t8.3

102A 4.9/6,5 23,5/27,t

103B 6.5/8.7 31.4/36.3

184B 7,9/t 8,5 37,9/43,8

102A+102A 9.8/13,0 46.9/54.2

NONE - -

1OtA 3,3/4.4 15.9/t8.3

102A 4.9/6.5 23,5/27,1

103B 6,5/8,7 31,4/36,3

184B 7,9/t 8,5 37,9/43,8

102A+102A 9.8/13,0 46.9/54.2

NONE - -

10tA 3,3/4,4 9,2/10,6

DD- 102A 4.9/6.5 13.6/15.6

STD 103B 6.5/8.7 18.1/20,9

184B 7,9/t8,5 2t.9/25.3

105A 12,0/t6,0 33,4/38,5

NONE - -

10tA 3,3/4.4 9.2/t0,6

102A 4.9/6.5 13.6/15.6STD

103B 6,5/8,7 18,t/20,9

184B 7,9/t8,5 2t.9/25.3

105A 12,8/t6.0 33,4/38,5

NONE - -

1OtA 3,3/4.4 9.2/t0,6

102A 4.9/6.5 13.6/15.6MED

103B 6.5/8.7 18.1/20,9

104B 7,9/t0,5 21,9/25,3

105A 12,8/t6.0 33,4/38,5

NONE - -

10tA 3,3/4.4 9.2/t0,6

102A 4.9/6,5 13,6/t5,6HIGH

103B 6.5/8.7 18.1/20,9

184B 7,9/t8,5 2t.9/25.3

105A 12.0/'16.0 33A/38.5

NO RE.

MAX DISC. SIZEFUSE or

MCAHACRBRKR FLA LRA

28 40 26 95

28/29 40/40 26/27 95/95

36/40 40/45 33/37 95/95

46/52 50/60 42/47 95/95

54/61 60/70 49/56 95/95

65/74 70/80 60/68 95/95

28 40 26 95

28/29 40/40 26/27 95/95

36/40 40/45 33/37 95/95

46/52 50/60 42/47 95/95

54/61 60/70 49/56 95/95

65/74 70/80 60/68 95/95

w/RE. (pwrd fr/unit)

MAX DISC. SIZEFUSE or

MCAHACRBRKR FLA LRA

30 45 29 97

30/32 45/45 29/29 97/97

38/43 45/45 35/39 97/97

48/54 50/60 44/50 97/97

56/64 60/70 51/58 97/97

68/77 70/80 62/70 97/97

30 45 29 97

30/32 45/45 29/29 97/97

38/43 45/45 35/39 97/97

48/54 50/60 44/50 97/97

56/64 60/70 51/58 97/97

68/77 70/80 62/70 97/97

NO RE.

MAX

FUSE orMCA

HACR

BRKR

DISC. SIZE

MCA

FLA. LRA

2t

21/21

25/27

31/34

35/40

50/56

20

28/20

24/26

30/33

34/39

49/55

20

28/20

24/26

38/33

34/39

49/55

22/22

22/22

26/28

32/35

36/40

51/57

30 2t 83

30/30 21/21 83/83

30/30 23/25 83/83

35/35 28/31 83/83

35/40 32/36 83/83

50/60 45/5t 83/83

30 20 96

30/30 20/20 96/96

30/30 22/24 96/96

30/35 27/30 96/96

35/40 31/35 96/96

50/60 44/50 96/96

30 20 96

30/30 20/20 96/96

30/30 22/24 96/96

30/35 27/30 96/96

35/40 31/35 96/96

50/60 44/50 96/96

30/30 22/2t 134

30/30 22/2t 134/t34

30/30 24/26 134/t 34

35/35 29/32 134/t34

40/40 33/37 134/t 34

60/60 46/52 134/134

23

23/24

27/30

33/36

38/42

52/58

22

22/23

26/29

32/35

37/4t

51/57

22

22/23

26/29

32/35

37/4t

51/57

24/24

24/24

28/3 t

34/37

39/43

53/59

30 23 85

30/30 23/23 85/85

30/30 25/27 85/85

35/40 30/33 85/85

40/45 34/38 85/85

60/60 47/53 85/85

30 22 98

30/30 22/22 98/98

30/30 24/26 98/98

35/40 29/32 98/98

40/45 33/37 98/98

60/60 47/52 98/98

30 22 98

30/30 22/22 98/98

30/30 24/26 98/98

35/40 29/32 98/98

40/45 33/37 98/98

60/60 47/52 98/98

30/30 24/24 136

30/30 24/24 136/136

30/35 26/28 136/t 36

35/40 31/34 136/136

40/45 35/39 136/136

60/60 49/54 136/136

26 30

26/27 30/30

31/33 35/35

37/40 40/40

41/46 45/50

56/62 60/70

25 30

25/26 30/30

30/32 30/35

36/39 40/40

40/45 40/45

55/61 60/70

25 30

25/26 30/30

30/32 30/35

36/39 40/40

40/45 40/45

55/61 60/70

27/26 30/30

27/28 30/30

32/34 35/35

38/4t 40/45

42/46 45/50

57/63 60/70

26 88

26/26 88/88

28/30 88/88

33/36 88/88

38/42 88/88

51/57 88/88

25 18t

25/25 10t/10t

27/29 10t/101

32/36 101/t0t

37/4t 10t/101

50/56 10t/101

25 101

25/25 10t/10t

27/29 10t/101

32/36 10t/101

37/41 101/t0t

50/56 10t/101

27/27 139

27/27 139/t 39

29/3t 139/t39

34/37 139/t39

39/42 139/t39

52/58 139/139

w/RE. (pwrd fr/unit)

MAX DISC. SIZEFUSE or

HACRBRKR FLA LRA

28 30 28 90

28/30 30/30 28/28 90/90

33/36 35/40 30/33 90/90

39/42 40/45 35/39 90/90

44/48 45/50 40/44 90/90

58/64 60/70 53/59 90/90

27 30 27 103

27/29 30/30 27/27 103/t 03

32/35 35/35 29/32 103/t 03

38/41 40/45 35/38 103/t 03

43/47 45/50 39/43 103/t 03

57/63 60/70 52/58 103/t 03

27 30 27 103

27/29 30/30 27/27 103/t 03

32/35 35/35 29/32 103/t 03

38/4t 40/45 35/38 103/t 03

43/47 45/50 39/43 103/t 03

57/63 60/70 52/58 103/t 03

29/28 35/35 29/29 141

29/30 35/35 29/29 141/14t

34/37 35/40 31/33 141/t41

40/43 40/45 36/39 141/14t

45/49 45/50 41/45 141/14t

59/65 60/70 54/60 14t/14t

See "Legend and Notes for Table 10 on page 50.

c_ IFM> TYPE

OZ

Table 10 - Unit Wire/Fuse or HACR Breaker Sizing Data (cont)

ELEC. HTR NO C.O. or ONPWR C.O. w/ PWRD C.O.

CRHEATER***A00 Nom FLA(kW)

gi

o_ go

L_

NONE - -

106A 6.0 7,2

STD 107A 8.8 10,6

108A 11.5 13.8

109A 140 16.8

NONE - -

106A 6.0 7,2

MED 107A 8.8 10,6

108A 11.5 13.8

109A 140 16.8

NONE - -

106A 6.0 7,2

HIGH 107A 8.8 10,6

108A 11.5 13.8

109A 140 16.8

o STD NONE - -

o_ MED NONE - -I

LO_ HIGH NONE

See "Legend and Notes for Table 10 on page 50.

NO RE.

MAX DISC. SIZEFUSE or

MCAHACRBRKR FLA LRA

11 15 11 49

13 15 11 49

17 20 15 49

2t 25 19 49

25 25 22 49

11 15 11 49

13 15 11 49

17 20 15 49

2t 25 19 49

25 25 22 49

12 15 12 68

14 15 12 68

18 20 16 68

22 25 20 68

26 30 23 68

8 15 8 46

8 15 8 46

8 15 7 50

w/RE. (pwrd fr/unit)

MAX DISC. SIZEFUSE or

MCAHACRBRKR FLA LRA

12 15 12 50

14 15 12 50

18 20 16 50

22 25 20 50

26 30 23 50

12 15 12 50

14 15 12 50

18 20 16 50

22 25 20 50

26 30 23 50

13 15 13 69

15 15 13 69

19 20 17 69

23 25 2t 69

27 30 24 69

10 15 10 48

10 15 10 48

10 15 10 52

NO RE.

MAXFUSE or

MCAHACRBRKR

13 15

15 15

20 20

24 25

27 30

13 15

15 15

20 20

24 25

27 30

14 20

16 20

2t 25

25 25

28 30

10 15

10 15

10 15

DISC, SIZE

MCA

FLA LRA

13 51 14

14 51 17

18 51 2t

2t 51 25

25 51 29

13 51 14

14 51 17

18 51 2t

2t 51 25

25 51 29

14 70 15

15 70 18

19 70 22

22 70 26

26 70 30

10 48 12

10 48 12

9 52 11

w/RE. (pwrd fr/unit)

MAX DISC, SIZEFUSE or

HACRBRKR FLA LRA

20 14 52

20 15 52

25 19 52

25 23 52

30 26 52

20 14 52

20 15 52

25 19 52

25 23 52

30 26 52

20 15 71

20 16 71

25 20 71

30 23 71

30 27 71

15 12 50

15 12 50

15 12 54

I- o. IFM> TYPE

Oz

STD

ELEC. HTR

Table l0 - Unit Wire/Fuse or HACR Breaker Sizing Data (cont)

NO C.O. or UNPWR C.O.

NO RE.

Nom MAX DISC. SIZECRHEATER***A00 (kW) FLA FUSE or

MCA MCAHACRBRKR FLA LRA

NONE - - 34

1OtA 3.3/4.4 15.9/t8.3 34/34

103B 6.5/8.7 31.4/36.3 46/52

102A+lO2A 9.8/13.0 46.9/54.2 65/74

103B+t03B 131/17.4 62.8/72.5 85/97oi

oNONE - - 34

81OtA 3.3/4.4 15.9/t8.3 34/34

MED 103B 6.5/8.7 31.4/36.3 46/52

102A+t02A 9.8/t30 46.9/54.2 65/74

103B+t03B 131/17.4 62.8/72.5 85/97

NONE - - 25

102A 4.9/6.5 13.6/15.6 25/27

DD-103B 6.5/8.7 18.1/20.9 31/34

STD

105A 12.0/16.0 334/38.5 50/56

104B+t04B 158/21.0 438/50.5 63/71o_m NONE - - 24

102A 4.9/6.5 13.6/15.6 24/26

STD 103B 6.5/8.7 18.1/20.9 30/33

o 105A 12.0/16.0 334/38.5 49/55I

o_ 104B+t04B 158/21.0 438/50.5 62/70I

o NONE - - 24

o_ 102A 4.9/6.5 13.6/15.6 24/26

MED 103B 6.5/8.7 18.1/2&9 30/33

105A 12.0/16.0 334/38.5 49/55

104B+t04B 158/21.0 438/50.5 62/70

NONE - - 26/26

102A 4.9/6.5 13.6/15.6 26/28

HIGH 103B 6.5/8.7 18.1/20.9 32/35

105A 12.0/16.0 334/38.5 51/57

104B+104B 15.8/21.0 43.8/50.5 64/72

50 32 133 36

50/50 32/32 133/t 33 36/36

50/60 42/47 133/t 33 48/54

70/80 60/68 133/t 33 68/77

90/100 78/89 133/133 87/100 90/100 80/91 135/135

104B+t 04B 158/21.0 758/875 101/116 110/125 93/106 133/133 104/118 110/125 95/108 135/135

w/RE. (pwrd fr/unit)

MAX DISC. SIZEFUSE or

HACRBRKR FLA LRA

50 35 135

50/50 35/35 135/t 35

50/60 44/50 135/t 35

70/80 62/70 135/t 35

50 32 133 36 50 35 135

50/50 32/32 133/t 33 36/36 50/50 35/35 135/t 35

50/60 42/47 133/t 33 48/54 50/60 44/50 135/t 35

70/80 60/68 133/133 68/77 70/80 62/70 135/135

90/100 78/89 133/133 87/100 90/100 80/91 135/135

30 24 93 27

30/30 24/25 93/93 27/30

35/35 28/31 93/93 33/36

50/60 45/51 93/93 52/58

70/80 57/65 93/93 65/73

30 23 106 26

30 27 95

30/30 27/27 95/95

40/40 30/33 95/95

60/60 47/53 95/95

70/80 59/67 95/95

30 26 108

30/30 26/26 108/108

35/40 29/32 108/108

60/60 47/52 108/t 08

70/80 59/66 108/t 08

30 26 108

30/30 26/26 108/108

35/40 29/32 108/108

60/60 47/52 108/t 08

70/80 59/66 108/t 08

40/40 28/27 146

40/40 28/28 146/146

40/40 31/34 146/146

60/60 49/54 146/146

70/80 60/68 146/146

30/30 23/24 106/106 26/29

30/35 27/30 106/106 32/35

50/60 44/50 106/t 06 51/57

70/70 56/64 106/t 06 64/72

30 23 106 26

30/30 23/24 106/106 26/29

30/35 27/30 106/106 32/35

50/60 44/50 106/t 06 51/57

70/70 56/64 106/t 06 64/72

30/30 25/25 144 28/28

30/30 25/26 144/t44 28/31

35/35 29/32 144/t44 34/37

60/60 46/52 144/144 53/59

70/80 58/66 144/144 66,"74

MCA

=

=

=

=

=

30

31/33

37/40

56/62

69/77

29

30/32

36/39

55/6t

68/76

29

30/32

36/39

55/6t

68/76

31/31

32/34

38/4t

57/63

70/78

NO RE.

DISC. SIZE

FLA LRA

w/ PWRD C.O.

w/RE. (pwrd fr/unit)

MAX DISC. SIZE

FUSE orMCA

HACR

BRKR FLA LRA

32 45 32 1OO

MAXFUSE or

HACRBRKR

=

=

=

=

=

40

40/40

40/40

60/70

70/80

40

40/40

40/40

60/70

70/80

40

40/40

40/40

60/70

70/80

40/40

40/40

40/45

60/70

70/80

30 98

30/30 98/98 33/36 45/45 32/33 100/t OO

33/36 98/98 39/42 45/45 35/39 100/t OO

51/57 98/98 58/64 60/70 53/59 100/100

63/70 98/98 71/79 80/80 65/73 100/100

29 111 3t 40 3t 113

29/29 111/111 32/35 40/40 31/32 113/t 13

32/36 111/111 38/4t 40/45 35/38 113/t 13

50/56 111/111 57/63 60/70 52/58 113/113

62/70 111/111 70/78 70/80 64/72 113/113

29 111 3t 40 3t 113

29/29 111/111 32/35 40/40 31/32 113/t 13

32/36 111/111 38/4t 40/45 35/38 113/t 13

50/56 111/111 57/63 60/70 52/58 113/113

62/70 111/111 70/78 70/80 64/72 113/113

31/31 149 33/32 45/45 33/33 151

31/31 149/t49 34/37 45/45 33/33 151/151

34/37 149/t49 40/43 45/45 36/39 151/151

52/58 149/149 59/65 60/70 54/60 151/151

64/71 149/t 49 72/80 80/80 66,"73 151/t 51

See "Legend and Notes for Table 10 on page 50.

c_ IFM> TYPE

OZ

Table 10 - Unit Wire/Fuse or HACR Breaker Sizing Data (cont)

ELEC. HTR NO C.O. or ONPWR C.O. w/ PWRD C.O.

CRHEATER***A00 Nom FLA(kW)

=oi

=o

NONE - -

106A 6,0 7,2

STD 108A 11,5 13.8

10gA 14.0 16,8

108A+ t08A 230 27,7

NONE - -

106A 6,0 7,2

MED 108A 11.5 13.8

10gA 14.0 16.8

108A+ t08A 230 27.7

NONE - -

106A 6.0 7,2

HIGH 108A 11.5 13.8

10gA 14.0 16.8

108A+ t08A 230 27.7

o STD NONE - -

o_ MED NONE - -I

LO_ HIGH NONE

See "Legend and Notes for Table 10 on page 50.

NO RE.

MAX DISC. SIZEFUSE or

MCAHACRBRKR FLA LRA

12 15 11 52

13 15 11 52

2t 25 19 52

25 25 22 52

38 40 35 52

12 15 11 52

13 15 11 52

2t 25 19 52

25 25 22 52

38 40 35 52

12 15 12 71

14 15 12 71

22 25 20 71

26 30 23 71

39 40 36 71

9 15 9 42

9 15 9 42

9 15 9 46

w/RE. (pwrd fr/unit)

MAX DISC. SIZEFUSE or

MCAHACRBRKR FLA LRA

13 15 12 53

14 15 12 53

22 25 20 53

26 30 23 53

40 40 36 53

13 15 12 53

14 15 12 53

22 25 20 53

26 30 23 53

40 40 36 53

13 15 13 72

15 15 13 72

23 25 2t 72

27 30 24 72

4t 45 37 72

11 15 11 44

11 15 11 44

11 15 11 48

NO RE.

MAXFUSE or

MCAHACRBRKR

14 15

15 15

24 25

27 30

4t 45

14 15

15 15

24 25

27 30

4t 45

15 20

16 20

25 25

28 30

42 45

11 15

11 15

11 15

DISC. SIZE

MCA

FLA LRA

14 54 15

14 54 17

2t 54 25

25 54 29

37 54 42

14 54 15

14 54 17

2t 54 25

25 54 29

37 54 42

14 73 16

15 73 18

22 73 26

26 73 30

38 73 43

11 44 13

11 44 13

10 48 13

w/RE. (pwrd fr/unit)

MAX DISC. SIZEFUSE or

HACRBRKR FLA LRA

20 15 55

20 15 55

25 23 55

30 26 55

45 39 55

20 15 55

20 15 55

25 23 55

30 26 55

45 39 55

20 16 74

20 16 74

30 23 74

30 27 74

45 39 74

15 13 46

15 13 46

15 13 50

Table 10 - Unit Wire/Fuse or HACR Breaker Sizing Data (cent)

TYPE

oz

STD

oi

o

MED

ELEC. HTR NO C.O. or UNPWR C.O.

NO RE.

Nom MAX DISC. SIZECRHEATER***A00 (kW) FLA FUSE or

MCA MCAHACRBRKR FLA LRA

NONE 40

102A 4,9/6.5 23.5/27,1 40/40

103B 6,5/8,7 31,4/36,3 46/52

102A+102A 9,8/t3,0 46,9/54,2 65/74

103B+103B 13,t/t7,4 62,8/72,5 85/97

60 37 150 42

60/60 37/37 150/t 50 42/43

60/60 42/47 150/t 50 48/54

70/80 60/68 150/t 50 68/77

w/RE. (pwrd fr/unit)

MAX DISC. SIZEFUSE or

HACRBRKR FLA LRA

60 40 152

60/60 40/40 152,/152

60/60 44/50 152/152

70/80 62/70 152/152

90/t 00 78/89 150/t 50 87/t 00 90/t 00 80/9 t 152/152

104B + 104B 15.8/21.0 75.8/87.5 10 t/t 16 110/t 25 93/106 150/t 50 104/118 110/t 25 95/108 152,/152

NONE 42 60 40 175 44 60 42 177

102A 4.9/6.5 23.5/27.1 42/43 60/60 40/40 175/175 44/45 60/60 42/42 177/177

103B 6.5/8.7 31.4/36.3 48/55 60/60 44/50 175/175 51/57 60/60 46/52 177/177

102A+ 102A 9.8/t 3.0 46.9/54.2 68/77 70/80 62/70 175/175 70/79 70/80 64/73 177/177

103B+103B 13.t/t7.4 62.8/72.5 88/t00 90/t00 80/91 175/175 90/t02 90/t10 82/94 177/t77

104B + 104B 15.8/21.0 75.8/87.5 104/119 110/t 25 95/109 175/175 106,"121 110/t 25 97/t 11 177/t 77

NONE - - 29

102A 4.9/6.5 13.6/t5.6 29/29

DD- 104B 7.9/t0.5 21.9/25.3 37/42

STD 105A 12.0/t 6.0 33.4/38.5 52/58

104B+104B 15.8/21.0 43.8/50.5 65/73

_ 104B+t05A 19.9/26.5 55.2/63.8 79/90

NONE - - 27_o

102A 4.9/6,5 13,6/t5,6 27/27

104B 7.9/t 0.5 21.9/25.3 34/39STD

105A 12.0/t 6.0 33.4/38.5 49/55

o 104B+104B 15.8/2t.0 43.8/50.5 62/70I

104B+t05A 19.9/26.5 55.2/63.8 76/87

O NONE - - 28/28

o_ 102A 4.9/6.5 13.6/t 5.6 28/28

104B 7.9/t 0.5 21.9/25.3 36,.'40MED

105A 12.0/t6.0 33.4/38.5 51/57

104B+104B 15.8/2t.0 43.8/50.5 64/72

104B+t05A 19.9/26.5 55.2/63.8 78/89

NONE 30/30

102A 4.9/6.5 13.6/t5.6 30/30

104B 7.9/t0.5 21.9/25.3 38/42HIGH

105A 12.0/t 6.0 33.4/38.5 53/59

104B+104B 15.8/2t.0 43.8/50.5 66/74

164B+105A 19.9/26.5 55.2/63.8 86/91

40 28 122 31

40/40 28/28 122/122 31/32

40/45 34/38 122/t 22 40/44

60/60 47/53 122/122 54/60

70/80 59/67 122/122 67/75

80/90 72/82 122/t 22 81/92

40 26 133 29

40/40 26/26 133/133 29/29

40/40 3t/35 133/133 37/4t

50/60 44/50 133/133 51/57

70/70 56/64 133/133 64/72

80/90 69/79 133/133 78/89

40/40 28/27 171 30/30

40/40 28/27 17t/t7t 30/31

40/40 33/37 17t/t7t 39/43

60/60 46/52 171/t71 53/59

70/80 58/66 171/t71 66/74

80/90 7t/81 171/t71 80/91

45/40 29/29 186 32/32

45/40 29/29 186/t 86 32/33

45/45 35/39 186/t86 41/45

60/60 48/54 186/t 86 55/61

70/80 60/68 186/t 86 68/76

86/t 00 73/83 186/186 82/93

45 31 124

45/45 31/31 124/t24

45/45 36/40 124/t 24

60/60 49/55 124/t 24

70/80 6 t/69 124/t 24

90/t 00 74/84 124/t 24

40 28 135

40/40 28/28 135/135

40/45 33/37 135/135

60/60 47/52 135/135

70/80 59/66 135/135

80/90 72/82 135/135

45/45 30/30 173

45/45 30/30 173/173

45/45 35/39 173/173

60/60 49/54 173/173

70/80 60/68 173/173

90/t 00 74/83 173/173

45/45 32/31 188

45/45 32/31 188/t 88

45/45 37/4t 188/188

60/70 50/56 188/188

70/80 62/70 188/188

90/t 00 75/85 188/t 88

NO RE.

w/ PWRD C.O.

MAX DISC. SIZEFUSE or

MCA MCAHACRBRKR FLA LRA

34 45

34/35 45/45

43/48 45/50

58/64 60/70

71/79 80/80

w/RE. (pwrd fr/unit)

MAX DISC. SIZEFUSE or

HACRBRKR FLA LRA

50 36 12934 127 36

34/34 127/127 36/38 50/50 36/36 129/t 29

39/43 127/t 27 46/50 50/50 42/46 129/t 29

53/59 127/t 27 60/66 60/70 55/6 t 129/t 29

65/72 127/t 27 73/8 t 80/90 67/75 129/t 29

85/96 90/t 00 78/88 127/t 27 87/98 90/t 00 80/90 129/t 29

31 45 31 138 33 45 33 140

31/32 45/45 31/31 138/138 33/35 45/45 33/33 140/t 40

40/45 45/45 37/4t 138/t 38 43/47 45/50 39/43 140/t 40

55/6 t 60/70 50/56 138/t 38 57/63 60/70 52,/58 140/t 40

68/76 70/80 62/70 138/138 70/78 70/80 64/72 140/t 40

82/93 90/t 00 75/85 138/138 84/95 90/t 00 77/87 140/t 40

33/33 45/45 33/33 176 35/35 50/50 35/35 178

33/34 45/45 33/33 176/176 35/37 50/50 35/35 178/t 78

42/46 45/50 39/42 176,"176 45/49 50/50 4t/45 178/t 78

57/63 60/70 52/58 176/t 76 59/65 60/70 54/60 178/t 78

70/78 70/80 64/7 t 176/t 76 72/80 80/80 66/73 178/t 78

84/95 90/t 00 77/87 176/t 76 86/97 90/t 00 79/89 178/t 78

35/35 45/45 35/35 191 37/36 50/50 37/37 193

35/36 45/45 35/35 191/t91 37/39 50/50 37/37 193/193

44/48 45/50 40/44 191/t 9t 47/5t 50/60 43/46 193/193

59/65 60/70 54/59 191/t 9t 61/67 70/70 56/62 193/193

72/80 80/80 66/73 191/t 9t 74/82 80/90 68/75 193/193

86/97 90/t 00 79/88 191/191 88/99 90/t 00 81/91 193/t 93

See "Legend and Notes for Table 10 on page 50.

c_ IFM> TYPE

OZ

Table 10 - Unit Wire/Fuse or HACR Breaker Sizing Data (cent)

ELEC. HTR NO C.O. or ONPWR C.O. w/ PWRD C.O.

CRHEATER***A00 Nom(kW)

o

i8 goo_

STD

MED

HIGH

o STD

/ MEDi

LOHIGH

FLA

NONE - -

106A 6.0 7,2

108A 11.5 13.8

109A 14.0 16.8

108A+ t 08A 23.0 27.7

108A+ t 09A 25.5 30.7

NONE - -

106A 6.0 7,2

108A 11.5 13.8

109A 140 16.8

108A+ t08A 230 27.7

108A + 109A 25.5 30,7

NONE - -

106A 6.0 7,2

108A 11.5 138

109A 14,0 16.8

108A + 108A 23.0 27,7

108A + 109A 25.5 30,7

NONE - -

NONE - -

NONE - -

See "Legend and Notes for Table 10 on page 50.

NO RE.

MAX DISC, SIZEFUSE or

MCAHACRBRKR FLA LRA

13 20 13 63

13 20 13 63

2t 25 19 63

25 25 22 63

38 40 35 63

42 45 38 63

14 20 14 82

14 20 14 82

22 25 20 82

26 30 23 82

39 40 36 82

43 45 39 82

15 20 15 90

15 20 15 90

23 25 21 90

27 30 24 90

40 40 37 90

44 45 40 90

11 15 10 48

10 15 10 52

11 15 11 63

w/RE. (pwrd fr/unit)

MAX DISC. SIZEFUSE or

MCAHACRBRKR FLA LRA

14 20 14 64

14 20 14 64

22 25 20 64

26 30 23 64

40 40 36 64

43 45 39 64

15 20 15 83

15 20 15 83

23 25 2t 83

27 30 24 83

4t 45 37 83

44 45 40 83

16 20 16 91

16 20 16 91

24 25 22 91

28 30 25 91

42 45 38 91

45 45 41 91

13 15 12 50

12 15 12 54

13 15 13 65

NO RE.

MAXFUSE or

MCAHACRBRKR

16 20

16 20

24 25

27 30

4t 45

45 45

16 20

16 20

25 25

28 30

42 45

46 50

17 20

17 20

26 30

29 30

43 45

47 50

12 15

12 15

13 15

DISC, SIZE

MCA

FLA LRA

15 65 17

15 65 17

2t 65 25

25 65 29

37 65 42

4t 65 46

16 84 17

16 84 18

22 84 26

26 84 30

38 84 43

42 84 47

17 92 18

17 92 19

23 92 27

27 92 3t

39 92 44

43 92 48

12 50 14

12 54 14

13 65 15

w/RE. (pwrd fr/unit)

MAX DISC, SIZEFUSE or

HACRBRKR FLA LRA

20 16 66

20 16 66

25 23 66

30 26 66

45 39 66

50 42 66

20 17 85

20 17 85

30 23 85

30 27 85

45 39 85

50 43 85

25 18 93

25 18 93

30 24 93

35 28 93

45 40 93

50 44 93

20 14 52

15 14 56

20 15 67

Table 10 - Unit Wire/Fuse or HACR Breaker Sizing Data (cent)

I- _ IFM> TYPE

Oz

STD

gI

i:0oI MED

8o,i

1,o

o_o_ HIGH

STD

i

?

g / MEDI

ELEC. HTR

NomCRHEATER***A00 (kW) FLA

MCA

NONE - - 33/33

102A 4,9/6.5 13.6/t 5.6 33/33

104B 7.9/10.5 21.9/25.3 36/40

105A 12.0/t6.0 33.4/38,5 51/57

104B+104B 15.8/21.0 43.8/50.5 64/72

104B+105A 19.9/26.5 55.2/638 78/89

NONE - - 35/35

102A 4,9/6.5 13.6/t5.6 35/35

104B 7.9/10.5 21.9/25.3 38/42

105A 12.0/t 6.0 33.4/38,5 53/59

104B+104B 15.8/21.0 43.8/50.5 66,,'74

104B+105A 19.9/26.5 55.2/638 80/91

NONE - - 37

102A 4,9/6.5 13.6/t5.6 37/37

104B 7.9/10.5 21.9/25.3 4t/45

105A 12.0/t 6.0 33.4/38,5 55/62

104B+104B 15.8/21.0 43.8/50.5 68/77

104B+105A 19.9/26.5 55.2/63.8 83/93

NONE - - 15

106A 6.0 7.2 15

108A 11.5 13.8 22

109A 14,0 16.8 26

108A+ 108A 23.0 27,7 39

108A+ 109A 25.5 30,7 43

NONE - - 16

106A 6.0 7.2 16

108A 11.5 13.8 23

109A 14,0 16.8 27

108A+ 108A 23.0 27,7 40

108A+ 109A 25.5 30,7 44

NONE - - 17

106A 6.0 7.2 17

108A 11.5 13.8 24HIGH

109A 14,0 16.8 28

108A+ 108A 23.0 27,7 42

108A+ 109A 25.5 30,7 45

o STD NONE - - 11/

MED NONE - - 12I

i,oHIGH NONE 12

NO C.O. or UNPWR C.O,

NO RE.

MAX DISC. SIZEFUSE or

MCAHACRBRKR FLA LRA

50/50 32/32 197 35/35

50/50 32/32 197/t 97 35/35

50/50 33/37 197/197 39/43

60/60 46/52 197/t 97 53/59

70/80 58/66 197/t 97 66/74

80/90 71/81 197/197 80/91

50/50 34/34 2t 2 37/37

50/50 34/34 212/2t2 37/37

50/50 35/39 212/2t2 4t/45

60/60 48/54 212/2t2 55/6t

70/80 60/68 212/2t2 68/76

80/100 73/83 212/2t2 82/93

56 36 226 39

50/50 36,"36 226/226 39/39

50/50 37/41 226/226 43/48

60/70 51/56 226/226 58/64

70/80 63/70 226/226 71/79

90/100 76/86 226/226 85/96

w/RE. (pwrd fr/unit)

MAX DISC. SIZEFUSE or

HACRBRKR FLA LRA

50/50 34/34 199

50/50 34/34 199/t 99

50/50 35/39 199/199

60/60 49/54 199/t 99

70/80 60/68 199/t 99

90/100 74/83 199/199

50/50 36/36 2t 4

50/50 36/36 214/2t4

50/50 37/41 214/214

60/70 50/56 214/2t4

70/80 62/70 214/2t4

90/100 75/85 214/214

56 39 228

50/50 39/39 228/228

50/50 40/43 228/228

60/70 53/59 228/228

80/80 65/72 228/228

90/100 78/88 228/228

NO RE.

MAXFUSE or

MCAHACRBRKR

38/38 50/50

38/38 50/50

42/46 50/50

57/63 60/70

70/78 70/80

w/ PWRD C.O.

w/RE. (pwrd fr/unit)

DISC. SIZE MAX DISC. SIZEFUSE or

MCAHACR

FLA LRA BRKR FLA LRA

38/37 202 40/40 50/50 40/40 204

38/37 202/202 40/40 50/50 40/40 204/204

39/42 202/202 45/49 50/50 4t/45 204/204

52/58 202/202 59/65 60/70 54/60 204/204

64/7t 202/202 72/80 80/80 66/73 204/204

84/95 90/1 O0 77/87 202/202 86/97 90/1 O0 79/89 204/204

40/40 50/50 39/39 2t 7 42/4t 60/60 42/42 2t 9

40/40 50/50 39/39 217/217 42/4t 60/60 42/42 219/219

44/48 50/50 40/44 217/2 t 7 47/51 60/60 43/46 219/2 t9

59/65 60/70 54/59 217/217 6t/67 70/70 56,"62 219/219

72/80 80/80 66/73 217/217 74/82 80/90 68/75 219/2t9

86/97 90/1 O0 79/88 217/2 t 7 88/99 90/1 O0 81/91 219/2 t9

42 60 42 231 44 60 44 233

42/42 60/60 42/42 23t/23t 44/44 60/60 44/44 233/233

47/51 60/60 43/47 231/231 49/54 60/60 45/49 233/233

6t/68 70/70 56/62 23t/23t 64/70 70/70 58/64 233/233

74/83 80/90 68/76 23t/23t 77/85 80/90 70/78 233/233

89/99 90/1 O0 81/91 231/231 91/102 100/110 83/93 233/233

20 14 96 16 20 15 97

20 14 96 16 20 15 97

25 20 96 23 25 21 97

30 23 96 27 30 24 97

40 36 96 4t 45 37 97

45 39 96 44 45 40 97

20 15 104 17 20 16 105

20 15 104 17 20 16 105

25 21 104 24 25 22 105

30 24 104 28 30 25 105

40 37 104 42 45 38 105

45 40 104 45 45 41 105

20 16 111 18 25 18 112

20 16 111 18 25 18 112

25 22 111 26 30 23 112

30 25 111 29 30 27 112

45 38 111 43 45 39 112

50 4t 111 47 50 43 112

15 11 68 13 15 13 70

15 12 79 14 20 14 8t

15 12 79 14 20 14 8t

17 26 17 98 18 25 18 99

17 20 17 98 18 25 18 99

25 25 22 98 26 30 23 99

28 30 26 98 30 30 27 99

42 45 38 98 43 45 39 99

46 50 42 98 47 50 43 99

18 25 18 166 19 25 19 167

18 25 18 106 19 25 19 107

26 30 23 106 27 30 24 107

29 30 27 106 31 35 28 107

43 45 39 106 44 45 40 107

47 50 43 106 48 50 44 107

19 25 19 113 26 25 26 114

19 25 19 113 20 25 20 114

27 30 24 113 28 30 26 114

3t 35 28 113 32 35 29 114

44 45 40 113 46 50 42 114

48 50 44 113 49 50 45 114

13 15 13 70 15 20 15 72

14 15 13 8t 16 20 16 83

14 15 13 8t 16 20 16 83

See "Legend and Notes for Table 10 on page 50.

Table 10 - Unit Wire/Fuse or HACR Breaker Sizing Data (cent)

I- _ IFM> TYPE

Oz

STD

oI

oI MED

8o,i

HIGH

.__

STD

'E::3I

r_o

/ MEDLO I

ELEC. HTR

NomCRHEATER***A00 (kW) FLA

MCA

NONE - - 33/32

102A 4,9/6.5 13.6/t 5.6 33/32

104B 7.9/10.5 21.9/25.3 38/40

105A 12.0/t8.0 33.4/38,5 51/57

104B+104B 15.8/21.0 43.8/50.5 84/72

104B+105A 19.9/28.5 55.2/638 78/89

NONE - - 34/34

102A 4,9/6.5 13.8/t5.8 34/34

104B 7.9/10.5 21.9/25.3 38/42

105A 12.0/t 8.0 33.4/38,5 53/59

104B+104B 15.8/21.0 43.8/50.5 66/74

104B+lO5A 19.9/26.5 55.2/638 80/91

NONE - - 36

102A 4,9/6.5 13.6/t5.6 36/36

104B 7.9/10.5 21.9/25.3 4t/45

105A 12.0/t 6.0 33.4/38,5 55/62

104B+104B 15.8/21.0 43.8/50.5 68/77

104B+105A 19.9/26.5 55.2/63.8 83/93

NONE - - 17

106A 6.0 7.2 17

108A 11.5 13.8 22

109A 14,0 16.8 26

108A+ 108A 23.0 27,7 39

108A+ 109A 25.5 30,7 43

NONE - - 18

106A 6.0 7.2 18

108A 11.5 13.8 23

109A 14,0 16.8 27

108A+ 108A 23.0 27,7 40

108A+ 109A 25.5 30,7 44

NONE - - 19

106A 6.0 7.2 19

108A 11.5 13.8 24HIGH

109A 14,0 16.8 28

108A+ 108A 23.0 27,7 42

108A+ 109A 25.5 30,7 45

o STD NONE - - 12I

MED NONE - - 13/

HIGH NONE 13LO

NO C.O. or UNPWR C.O.

NO RE.

MAX DISC. SIZEFUSE or

MCAHACRBRKR FLA LRA

50/50 32/31 184 35/34

50/50 32/31 184/t84 35/34

50/50 33/37 184/184 39/43

80/60 46/52 184/t 84 53/59

70/80 58/68 184/t 84 88/74

80/90 71/81 184/184 80/91

50/50 33/33 199 36/36

50/50 33/33 199/t 99 38/38

50/50 35/39 199/199 4t/45

80/60 48/54 199/t 99 55/8 t

70/80 80/68 199/t 99 88/76

80/100 73/83 199/199 82/93

50 36 2t3 38

50/50 36/36 213/213 38/38

50/50 37/41 213/213 43/48

60/70 51/56 213/213 58/64

70/80 63/70 213/213 71/79

90/100 76/86 213/213 85/96

w/RE. (pwrd fr/unit)

MAX DISC. SIZEFUSE or

HACRBRKR FLA LRA

50/50 34/33 186

50/50 34/33 186,"186

50/50 35/39 186/186

60/60 49/54 186/186

70/80 60/68 186/186

90/100 74/83 186/186

50/50 35/35 20t

50/50 35/35 201/201

50/50 37/41 201/201

60/70 50/56 201/201

70/80 62/70 201/201

90/100 75/85 201/201

50 38 2t5

50/50 38/38 215/2t5

50/50 40/43 215/2 t5

60/70 53/59 215/2t5

80/80 65/72 215/2t5

90/100 78/88 215/2t5

NO RE.

MAXFUSE or

MCAHACRBRKR

37/37 50/50

37/37 50/50

42/46 50/50

57/63 80/70

70/78 70/80

w/PWRD C.O.

w/RE. (pwrd fr/unit)

DISC. SIZE MAX DISC. SIZEFUSE or

MCAHACR

FLA LRA BRKR FLA LRA

37/37 189 39/39 50/50 39/39 191

37/37 189/t89 39/39 50/50 39/39 191/t91

39/42 189/189 45/49 50/50 4t/45 191/191

52/58 189/t 89 59/65 60/70 54/60 191/t 91

64/7 t 189/t 89 72/80 80/80 66/73 191/t 91

84/95 90/100 77/87 189/189 86/97 90/100 79/89 191/191

39/39 50/50 39/39 204 41/4t 50/50 41/4! 206

39/39 50/50 39/39 204/204 4t/4t 50/50 4t/4t 206/206

44/48 50/50 40/44 204/204 47/51 50/60 43/46 206/206

59/65 60/70 54/59 204/204 6t/67 70/70 56/62 206/206

72/80 80/80 66/73 204/204 74/82 80/90 68/75 206/206

86/97 90/100 79/88 204/204 88/99 90/100 81/91 206/206

41 50 41 2t 8 43 60 43 220

4t/4t 50/50 4t/4t 218/218 43/43 60/60 43/43 220/220

47/51 50/60 43/47 218/2 t 8 49/54 60/60 45/49 220/220

6t/68 70/70 56/62 218/218 64/70 70/70 58/64 220/220

74/83 80/90 68/76 218/218 77/85 80/90 70/78 220/220

89/99 90/100 81/91 218/2 t8 91/102 100/110 83/93 220/220

25 16 92 18 25 17 93

25 16 92 18 25 17 93

25 20 92 23 25 21 93

38 23 92 27 38 24 93

40 36 92 4t 45 37 93

45 39 92 44 45 40 93

25 17 100 19 25 18 10t

25 17 100 19 25 18 10t

25 21 100 24 25 22 10t

30 24 100 28 30 25 10t

40 37 100 42 45 38 10t

45 40 100 45 45 41 10t

25 18 107 20 25 19 108

25 18 107 20 25 19 108

25 22 107 26 30 23 108

30 25 107 29 30 27 108

45 38 107 43 45 39 108

50 4t 107 47 50 43 108

15 12 63 14 20 14 65

20 12 74 15 20 15 76

20 12 74 15 20 15 76

19 25 19 94 20 25 20 95

19 25 19 94 20 25 20 95

25 25 22 94 26 30 23 95

28 30 26 94 30 30 27 95

42 45 38 94 43 45 39 95

46 50 42 94 47 50 43 95

20 25 19 102 2t 30 2t 103

20 25 19 102 21 30 21 103

26 30 23 102 27 30 24 103

29 30 27 102 31 35 28 103

43 45 39 102 44 45 40 103

47 50 43 102 48 50 44 103

2t 30 2t 109 22 30 22 110

21 30 21 109 22 30 22 110

27 30 24 109 28 30 26 110

3t 35 28 109 32 35 29 110

44 45 40 109 46 50 42 110

48 50 44 109 49 50 45 110

14 20 13 65 16 20 16 67

15 20 14 76 17 20 17 78

15 20 14 76 17 20 17 78

See "Legend and Notes for Table 10 on page 50.

Legend and Notes for Table 10

LEGEND:

CO - Convenient outlet v Q US

DISC - Disconnect

FLA - Full load amps r_IFM - Indoor fan motorLRA - Locked rotor ampsMCA - Minimum circuit ampsMOCP - Maximum over current protectionPE - Power exhaust

UNPWR CO - Unpowered convenient outletNOTES:

1. In compliance with NEC requirements for multimotor andcombination load equipment (refer to NEC Articles 430 and440), the overcurrent protective device for the unit shall befuse or HACR breaker. Canadian units may be fuse or circuitbreaker.

2. Unbalanced 3-Phase Supply VoltageNever operate a motor where a phase imbalance in supplyvoltage is greater than 2%. Use the following formula to de-termine the percentage of voltage imbalance.

max voltage deviation from average voltage% Voltage imbalance = 1O0 x

average voltage

Example: Supply voltage is 230-3-60

AB = 224 vBC = 231 v

AC = 226 v

Average Voltage =(224 + 231 + 226)

3

681

3

= 227

Determine maximum deviation from average voltage.

(AB) 227 - 224 = 3 v

(BC) 231 - 227 = 4 v

(AC) 227- 226 = 1 v

Maximum deviation is 4 v.

Determine percent of voltage imbalance.

4% Voltage imbalance = 100 x

227

= 1.76%

This amount of phase imbalance is satisfactory as it is below themaximum allowable 2%.

IMPORTANT: If the supply voltage phase imbalance is more than2%, contact your local electric utility company immediately.

50

ECONOMIZER (FlOP/ACCESSORY)

/Economizer

F<'__°7

ER

I

IL ......

PL6R

4

2 Position Damper

PL6R

FOR STDRIT ..

Unit Without Economizer or

2 Position DamperC08631

Fig. 75 -EconoMi$er TM IV Wiring

Step 11 -- Adjust Factory-Installed Options

Smoke Detectors --

Smoke detector(s) will be connected at the ControlsConnections Board, at terminals marked "Smoke

Shutdown". Remove jumper JMP 3 when ready to

energize unit.

EconoMiRer IV Occupancy Switch --

Refer to Fig. 75 for general EconoMi$er IV wiring.

External occupancy control is managed through aconnection on the Central Terminal Board.

If external occupancy control is desired, connect a timeclock or remotely controlled switch (closed for Occupied,open for Unoccupied sequence) at terminals markedOCCUPANCY on CTB. Remove or cut jumper JMP 2 tocomplete the installation.

Step 12 -- Install Accessories

Available accessories include:

Roof Curb

Thru-base connection kit (must be installed before unitis set on curb)

Manual outside air damper

Two-Position motorized outside air damper

EconoMi$er IV (with control and integrated barometric

relief)

EconoMi$er2 (without control/for external signal and

integrated barometric relief)

Power Exhaust

Differential dry-bulb sensor (EconoMi$er IV)

Outdoor enthalpy sensor

Differential enthalpy sensor

Electric Heaters

Single Point kits

Low Ambient Controls

Thermostat / Sensors

CO2 sensor

DDC interface (PremierLink)

Louvered hail guard

Phase monitor control

Refer to separate installation instructions for informationon installing these accessories.

Pre-Start and Start-Up

This completes the mechanical installation of the unit.Refer to the unit's Service Manual for detailed Pre-Start

and Start-up instructions.

51

52

53

Copyright 2015 Carrier Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 Edition Date: 03/15

Manufacturer reserves the right to change, at any time, specification8 and design8 without notice and without obligations,

Catalog No: 50TC-4-7-02SI

Replaces: 50TC-4-7-OlSI

54

I,

II.

UNIT START-UP CHECKLIST(Remove and Store in Job File)

MODEL NO.: SERIAL NO.:

PRE-START-UP

VERIFY THAT ALL PACKAGING MATERIALS HAVE BEEN REMOVED FROM UNIT

VERIFY INSTALLATION OF OUTDOOR AIR HOOD

VERIFY INSTALLATION OF FLUE EXHAUST AND INLET HOOD

VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTRUCTIONS

VERIFY THAT ALL ELECTRICAL CONNECTIONS AND TERMINALS ARE TIGHT

CHECK THAT INDOOR-AIR FILTERS ARE CLEAN AND IN PLACE

CHECK THAT OUTDOOR AIR INLET SCREENS ARE IN PLACE

VERIFY THAT UNIT IS LEVEL

CHECK FAN WHEELS AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND VERIFYSETSCREW IS TIGHT

VERIFY THAT FAN SHEAVES ARE ALIGNED AND BELTS ARE PROPERLY TENSIONED

VERIFY THAT SCROLL COMPRESSORS ARE ROTATING IN THE CORRRECT DIRECTION

VERIFY INSTALLATION OF THERMOSTAT

START-UP

ELECTRICAL

SUPPLY VOLTAGE L1-L2

COMPRESSOR AMPS 1 L1

COMPRESSOR AMPS 2 L1

SUPPLY FAN AMPS L1

TEMPERATURES

OUTDOOR-AIR TEMPERATURE

RETURN-AIR TEMPERATURE

COOLING SUPPLY AIR TEMPERATURE

PRESSURES

REFRIGERANT SUCTION CIRCUIT A

CIRCUIT B

REFRIGERANT DISCHARGE CIRCUIT A

CIRCUIT B

L2-L3 L3-L1

L2 L3

L2 L3

L2 L3

OF DB (DRY BULB)

OF DB

oF

PSIG

PSIG

PSIG

PSIG

OF WB (WET BULB)

[Z VERIFY REFRIGERANT CHARGE USING CHARGING CHARTS

GENERAL

[Z ECONOMIZER MINIMUM VENT AND CHANGEOVER SETIINGS TO JOB REQUIREMENTS (IF EQUIPPED)

[Z VERIFY SMOKE DETE(_OR UNIT SHUTDOWN BY UTILIZING MAGNET TEST

55

III. HUMIDIMIZER START-UP (50TC-B07 ONLY)STEPS

[Z 1. CHECK CTB FOR JUMPER 5, 6, 7JUMPER 5, 6, 7 MUST BE CUT AND OPEN

[Z 2. OPEN HUMIDISTAT CONTACTS

[Z 3. START UNIT IN COOLING (CLOSE Y1)OBSERVE AND RECORD

A. SUCTION PRESSURE

B. DISCHARGE PRESSURE

C. ENTERING AIR TEMPERATURE

D. LIQUID LINE TEMPERATUREAT OUTLET OR REHEAT COIL

PSIG

PSIG

oF

°F

E. CONFRIM CORRECT ROTATION FOR COMPRESSOR

F. CHECK FOR CORRECT RAMP-UP OF OJUTDOOR FAN MOTOR AS CONDENSER COIL WARMS

4. CHECK UNIT CHARGE PER CHARGING CHART

5. SWITCH UNIT TO HIGH-LATENT MODE (SUBCOOLER) BY CLOSING HUMIDISTAT WITH Y1 CLOSED

OBSERVE

REDUCTION IN SUCTION PRESSURE (5 TO 7 PSI EXPECTED)

DISCHARGE PRESSURE UNCHANGED

LIQUID TEMPERATURE DROPS TO 50 TO 55 °F RANGE

LSV SOLENOID ENGERIZED (VALVE CLOSES)

6. SWITCH UNIT TO DEHUMID (REHEAT) BY OPENING Y1

OBSERVE

[Z A.

[Z B.

[3 C.

[Z D.

[Z A.

[Z B.

[3 C.

[Z D.

[Z E.

[37.

SUCTION PRESSURE INCREASES TO NORMAL COOLING LEVEL

DISCHARGE PRESSURE DECREASES (35 TO 50 PSI)

LIQUID TEMPERATURE RETURNS TO NORMAL COOLNG LEVEL

LSV SOLENOID ENERGIZED (VALVE CLOSES)

DSV SOLENOID ENERGIZED, VALVE OPENS

WITH UNIT IN DEHUMID MODE CLOSE W1COMPRESSOR AND OUTDOOR FAN STOP; LSV AND DSV SOLENOIDS DE-ENERGIZED

OPEN W1 RESTORE UNIT TO DEHUMID MODE[38.

[Z 9. OPEN HUMIDISTAT INPUTCOMPRESSOR AND OUTDOOR FAN STOP; LSV AND DSV SOLENOIDS DE-ENERGIZED

[Z 10. RESTORE SETPOINTS FOR THERMOSTAT AND HUMIDISTAT

Copyright 2015 Carrier Corp. • 7310 W. Morris St. • Indianapolis, IN 46231 Edition Date: 03/15

Manufacturer reserves the right to change, at any time, specification8 and design8 without notice and without obligations,

Catalog No: 50TC-4-7-02SI

Replaces: 50TC-4-7-OlSI

56