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Carrier 50VT-A installation instructions 50VT--A, A11002

Models: 50VT-A

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Image 11

50VT-- A

A11002

Fig. 12 - Connection Wiring Schematics 208/230-1-60

Page 11

Image 11

Carrier 50VT-A installation instructions 50VT--A, A11002

Contents

Installation Instructions TABLE OF CONTENTSSAFETY CONSIDERATIONS Fig. 1 - Unit 50VT-AStep 1 - Check Equipment RECEIVING AND INSTALLATIONInstallation on older “G” series roof curbs INTRODUCTIONA09410 Fig. 2 - 50VT-A24-30Unit Dimensions50VT--A A09411 Fig. 3 - 50VT-A36-60Unit Dimensions50VT--A 50VT--A Fig. 4 - Roof Curb DimensionsLARGE CURB UNIT PLACEMENT ON COMMON CURBRigging/Lifting of Unit See Fig Fig. 5 - Rigging WeightsStep 4 - Rig and Place Unit InspectionFig. 6 - Supply and Return Duct Opening Step 5 - Select and Install DuctworkCONFIGURING UNITS FOR DOWNFLOW VERTICAL DISCHARGE PERSONAL INJURY HAZARDFig. 7 - Unit Leveling Tolerances Step 7 - Install Electrical ConnectionsHigh-VoltageConnections Step 6 - Provide for Condensate DisposalStandard Connections Special Procedures for 208-VOperationControl Voltage Connections Accessory Electric Heaters Installation50VT--A Fig. 11 - Typical InstallationTable 1 - Physical Data - Unit 50VT-A INDOOR THERMOSTAT RETURN AIR FROM POWER SOURCEA11002 50VT--AA11001 50VT--AA11006 50VT AA11005 50VT--AA10195 Fig. 14 - Connection Wiring Diagram50VT--A 50VT--A Fig. 14 Cont. - Ladder Wiring DiagramChecking Cooling and Heating Control Operation Step 2 - Start-UpAdjustmentsSTART-UP Step 1 - Check for Refrigerant Leaks50VT--A Checking and Adjusting Refrigerant ChargeIndoor Airflow and Airflow Adjustments UNIT OPERATION HAZARDAccuraterMetering De vice HPS - High Pressure SwitchLCS – Loss of Charge Switch Continuous Fan OperationFig. 16 - Interface Fan Board IFB Step 3 - Defrost ControlQuiet Shift DefrostUnit 50VT--A50VT--A Small CabinetElectric Heat Pressure Drop Table in. W.C Large CabinetPERSONAL INJURY AND UNIT DAMAGE HAZARD MAINTENANCEStep 1 - Air Filter Indoor Blower and MotorA09412 Fig. 18 - Cooling Charging Table-Subcooling50VT--A Page Step 5 - Refrigerant Circuit Step 4 - Electrical Controls and WiringFig. 21 - Unit Access Panels Step 3 - Outdoor FanSynthetic Roof Precautionary Procedure Step 8 - Pressure SwitchesStep 9 - Loss of Charge Switch Step 10 - High-PressureSwitchStep 13 - System Information TROUBLESHOOTINGSTART-UPCHECKLIST Loss of Charge Switch50VT--A PURONR R-410AQUICK REFERENCE GUIDE50VT--A Table 10 - Troubleshooting ChartPRESSURES Remove and Store in Job FilesI. PRELIMINARY INFORMATION MODEL NO TEMPERATURESReplaces 50VT---08SI 50VT--ACatalog No 50VT---09SI Edition Date 01/11