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48TCA04---A12
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Fig. 42 --PremierLink Wiring Schematic
48TC
Contents
Main
48TCA04---A12 Nominal 3 to 10 Tons With Puron(R---410A) Refrigerant
Service and Maintenance Instructions
TABLEOF CO NTENTS
SAFETY CONSIDERATIONS
UNIT ARRANGEMENT AND ACCESS
General
RoutineMaintenance
Seasonal Maintenance
SUPPLYFAN (BLOWER) SECTION
Supply Fan (Belt--Drive)
COOLING
CondenserCoil
CondenserCoil Maintenance and Cleaning Recommendation
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Evaporator Coil
Refrigerant System Pressure Access Ports
PURONR(R--410A)REFRIGERANT
Refrigerant Charge
SEAT CORE
COOLING CHARGING CHARTS
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Table1 Cooling Service Analysis
Compressor
FilterDrier
Condenser--Fan Adjustment
TroubleshootingCooling System
CONVENIENCE OUTLETS
SMOKE DETECTORS
System
Controller
Sensor
Smoke Detector Locations
Completing Installation of Return Air Smoke Sensor:
FIOP Smoke Detector Wiring and Respon se
A
D
C
F
E
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Detector Cleaning
INDICATORS
Troubleshooting
PROTECTIVE DEVICES
Compresso r Protection
ReliefDevice
ControlCircuit, 24--V
GAS HEATING SYSTEM
Fuel Typesand Pressures
Flue Gas Passageways
Combustion--AirBlower
Burners and Igniters
Burner Ignition
OrificeReplacement
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Table9 IGC Conne ctions
Table10 Orifice Sizes
Table11 Altitude Com pensation* (A04--A07)
Table11 (cont.) --Altitude Compensation* (A08 --A12)
TroubleshootingHeating System
Table13 He ating Service Analysis
Table14 IGC Board LED Alarm Codes
PREMIERLINKTCONTROL
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Table16 PremierLink Sensor Usage
Table17 Space Se nsor Mode
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6 7
LCTB ECON 3
2
Enthalpy Switch GRA
GRA Factory Wiring Harness
}
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RTU--MP CONTROL SYSTEM
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Page
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Space Temperature (SPT) Sensors
SEN COM
J4-2 J4-3
IAQ Sensor 24 VAC
ConnectingDiscrete Inputs
PowerExhaust (output)
Power Exhaust J11-3 C
THERMOSTAT
PEC TAN GRA
RTU--MP Troubleshooting
Table22 LEDs The LEDson the RTU--MPshow the status of certain functions
Table23 Troubleshooting Al arms
Alarms
BACnet MS/TP
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Modbus
N2
ECONOMIZER SYSTEMS
Fig. 72 --EconoMi$er IV Wiring
4 3 5 2 8 6 7 1 10 11 9 12
Fig. 73 --EconoMi$er2 with 4 to 20 mA Control Wiring
RUN
YELLOW
EconoMi$er IV
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WIRING DIAGRAMS
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PRE--START--UP
START--UP,GENERAL
Unit Preparation
Gas Piping
Return--AirFilters
Cooling
Main Burners
Heating
Ventilation(Continuous Fan)
START--UP, PREMIERLINK CONTROLS
Perform System Check--Out
Initial Operation and Test
START--UP, RTU--MPCONTROL
Field Service Test
Configuration
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OPERATINGSEQUENCES
Base Unit Controls Cooling, Units Without Economizer
Heating, Units WithoutEconomizer
Cooling, Unit With EconoMi$er IV
Heating WithEconoMi$er IV
PremierLink Control
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RTU--MP Sequenceof Operation
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FASTENERTORQUE VALUES
APPENDIX I. MODEL NUMBER SIGNIFICANCE
ModelNumber Nomenclature
4 8 T C D A 0 4 A 1 A 5 -- 0 A 0 A 0
Serial Number Format
APPENDIX II. PHYSICAL DATA
Physical Data (Cooling) 3 --6 TONS
Physical Data (Cooling) 7.5 --10 TONS
Physical Data (Heating) 3 --6 TONS
Physical Data (Heating) 7.5 --10 TONS
APPENDIX III. FAN PERFORMANCE
General Fan Performance Notes:
48TC**04 1 Phase 3 TonHorizontal Supply
48TC**04 1 Phase 3 TonVertical Supply
48TC**04 3 Phase 3 TonHorizontal Supply
48TC**04 3 Phase 3 TonVertical Supply
48TC**05 1 Phase 4 TonHorizontal Supply
48TC**05 1 Phase 4 TonVertical Supply
48TC**05 3 Phase 4 TonHorizontal Supply
48TC**05 3 Phase 4 TonVertical Supply
48TC**06 1 Phase 5 TonHorizontal Supply
48TC**06 1 Phase 5 TonVertical Supply
48TC**06 3 Phase 5 TonHorizontal Supply
48TC**06 3 Phase 5 TonVertical Supply
48TC**07 3 Phase 6 TonHorizontal Supply
48TC**07 3 Phase 6 TonVertical Supply
48TC**08 3 PHASE 7.5 TON HORIZONTALSUPPLY
48TC**08 3 PHASE 7.5TON VERTICAL SUPPLY
FAN PERFORMANCE(cont.)
48TC**09 3 PHASE 8.5 TON HORIZONTALSUPPLY
48TC**09 3 PHASE 8.5 TON VERTICAL SUPPLY
FAN PERFORMANCE(cont.)
48TC**12 3 PHASE 10 TON HORIZONTALSUPPLY
48TC**12 3 PHASE 10 TON VERTICAL SUPPLY
Pulley Adjustment
APPENDIX IV.ELECTRICAL DATA
48TC**04 3 TONS
48TC**05 4 TONS
48TC**06 5 TONS
48TC**07 6 TONS
48TC**08 7.5 TONS
48TC**09 8.5 TONS
48TC**12 10 TONS
MCA/MOCPDETERMINATION NO C.O. OR UNPWRD C.O.
See notes on next page.
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APPENDIX V.WIRING DIAGRAM LIST
Wiring Diagrams
APPENDIX VI. MOTORMASTER SENSOR LOCATIONS
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UNIT START-UP CHECKLIST
I. PRELIMINARY INFORMATION:
II. PRE-START-UP(insert check mark in b ox as each item is completed):
III. START-UP
ELECTRICAL