View
4
Download
0
Category
Preview:
Citation preview
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
Recommended