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Carrier 50VT-A installation instructions 50VT--A, A11001

Models: 50VT-A

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Page 12

Image 12

50VT-- A

A11001

Fig. 12 Cont. - Ladder Wiring Schematics 208/230-1-60

Page 12

Image 12

Carrier 50VT-A installation instructions 50VT--A, A11001

Contents

TABLE OF CONTENTS SAFETY CONSIDERATIONSFig. 1 - Unit 50VT-A Installation InstructionsRECEIVING AND INSTALLATION Installation on older “G” series roof curbsINTRODUCTION Step 1 - Check EquipmentFig. 2 - 50VT-A24-30Unit Dimensions 50VT--AA09410 Fig. 3 - 50VT-A36-60Unit Dimensions 50VT--AA09411 Fig. 4 - Roof Curb Dimensions LARGE CURBUNIT PLACEMENT ON COMMON CURB 50VT--AFig. 5 - Rigging Weights Step 4 - Rig and Place UnitInspection Rigging/Lifting of Unit See FigStep 5 - Select and Install Ductwork CONFIGURING UNITS FOR DOWNFLOW VERTICAL DISCHARGEPERSONAL INJURY HAZARD Fig. 6 - Supply and Return Duct OpeningStep 7 - Install Electrical Connections High-VoltageConnectionsStep 6 - Provide for Condensate Disposal Fig. 7 - Unit Leveling TolerancesSpecial Procedures for 208-VOperation Control Voltage ConnectionsAccessory Electric Heaters Installation Standard ConnectionsFig. 11 - Typical Installation Table 1 - Physical Data - Unit 50VT-AINDOOR THERMOSTAT RETURN AIR FROM POWER SOURCE 50VT--A50VT--A A1100250VT--A A1100150VT A A1100650VT--A A11005Fig. 14 - Connection Wiring Diagram 50VT--AA10195 Fig. 14 Cont. - Ladder Wiring Diagram 50VT--AStep 2 - Start-UpAdjustments START-UPStep 1 - Check for Refrigerant Leaks Checking Cooling and Heating Control OperationChecking and Adjusting Refrigerant Charge Indoor Airflow and Airflow AdjustmentsUNIT OPERATION HAZARD 50VT--AHPS - High Pressure Switch LCS – Loss of Charge SwitchContinuous Fan Operation AccuraterMetering De viceStep 3 - Defrost Control Quiet ShiftDefrost Fig. 16 - Interface Fan Board IFB50VT--A UnitSmall Cabinet Electric Heat Pressure Drop Table in. W.CLarge Cabinet 50VT--AMAINTENANCE Step 1 - Air FilterIndoor Blower and Motor PERSONAL INJURY AND UNIT DAMAGE HAZARDFig. 18 - Cooling Charging Table-Subcooling 50VT--AA09412 Page Step 4 - Electrical Controls and Wiring Fig. 21 - Unit Access PanelsStep 3 - Outdoor Fan Step 5 - Refrigerant CircuitStep 8 - Pressure Switches Step 9 - Loss of Charge SwitchStep 10 - High-PressureSwitch Synthetic Roof Precautionary ProcedureTROUBLESHOOTING START-UPCHECKLISTLoss of Charge Switch Step 13 - System InformationPURONR R-410AQUICK REFERENCE GUIDE 50VT--ATable 10 - Troubleshooting Chart 50VT--ARemove and Store in Job Files I. PRELIMINARY INFORMATION MODEL NOTEMPERATURES PRESSURES50VT--A Catalog No 50VT---09SIEdition Date 01/11 Replaces 50VT---08SI