Troubleshooting, Start-Upchecklist, 48VT--A

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Carrier 48VT(N) Troubleshooting, Start-Upchecklist, Unit Operation And Safety Hazard, Refrigerant System, Compressor Oil

Contents

SAFETY CONSIDERATIONS TABLE OF CONTENTSFig. 1 - Unit 48VT-A Installation Instructions INTRODUCTION RECEIVING AND INSTALLATIONStep 1 - Check Equipment Step 2 - Provide Unit Support Fig. 2 - 48VT-A24-30Unit Dimensions 48VT--AA09146 Fig. 3 - 48VT-A36-60Unit Dimensions 48VT--AA09147 48VT Fig. 4 - Roof Curb DimensionsSMALL CURB ROOF CURB DETAIL Step 5 - Rig and Place Unit ACCESS PANELS MUST BE IN PLACE WHEN RIGGINGInspection Rigging/Lifting of Unit See Fig Step 8 - Install Gas Piping Step 7 - Install Flue HoodStep 6 - Connect Condensate Drain Fig. 6 - Condensate Trap Configuring Units for Downflow Vertical Discharge Step 9 - Install Duct ConnectionsFig. 7 - Sediment Trap FIRE OR EXPLOSION HAZARD Fig. 8 - Supply and Return Duct Opening Table 1 - Physical Data - Unit 48VT-A48VT--A Horizontal Duct Covers Table 2 - Maximum Gas Flow Capacity Table 1 - Physical Data - Unit 48VT-ACont’dTable 3 - Heating Inputs 48VT--A Special Procedures for 208-VOperation Step 10 - Install Electrical ConnectionsHigh-VoltageConnections Control Voltage Connections PRE-START-UP Balance Point Setting-Thermidistator HybridTransformer Protection Thermostat START-UP Step 3 - Start-upHeating and Make Adjust- mentsStep 1 - Check for Refrigerant Leaks Step 2 - Unit Sequence of Operation Fig. 11 - Burner Assembly Adjust Gas InputCheck Heating Control Check Gas Input Check Burner Flame Limit SwitchesNormal Operation Airflow and Temperature Rise Rollout Switch Step 4 - Start-upCooling and Make Adjust- mentsChecking and Adjusting Refrigerant Charge Indoor Airflow and Airflow Adjustments Continuous Fan Operation Gas Heating Fan Speed Set-upTable 6 - Color Coding for Indoor Fan Motor Leads 48VT--A Table 8 - 48VT-AWet Coil Pressure Drop Fig. 14 - Interface Fan Board IFB48VT--A Table 7 - Filter Pressure Drop Table IN. W.C UNIT 48VT--A Heating 48VT--A 1295 48VT--A 1445 48VT--A 1448 48VT--A 48VT A Fig. 15 - 208/230-1-60Wiring Diagram, Unit 48VT-A Fig. 16 - 208/230-3-60Wiring Diagram, Unit 48VT-A 48VT--AA09209 48VT--A Fig. 17 - Cooling Charging Table-Subcooling50VT500173 REV A09099 Cleaning the Blower Motor and Wheel MAINTENANCEAir Filter Indoor Blower and Motor Induced Draft combustion air Blower Assembly Limit SwitchFig. 18 - Blower Housing and Flue Collector Box Fig. 19 - Unit Access Panels Outdoor Fan Electrical Controls and WiringRefrigerant Circuit Fig. 20 - Removal of Motor and Blower Wheel Loss of Charge Switch Pressure SwitchesHigh-PressureSwitch Gas InputPage LCS - Loss of Charge Switch HPS - High Pressure SwitchFig. 24 - Refrigerant Circuit AccuraterMetering De vice START-UPCHECKLIST TROUBLESHOOTINGUNIT OPERATION AND SAFETY HAZARD Synthetic Roof Precautionary Procedure 48VT--A PURONR R-410AQUICK REFERENCE GUIDE 48VT--A SYMPTOM Table 12 - Troubleshooting Guide-Heating Table 13 - Troubleshooting Guide-LEDStatus Codes48VT--A I. PRELIMINARY INFORMATION MODEL NO Remove and Store in Job FilesTEMPERATURES PRESSURES Catalog No 48VT---05SI 48VT--AEdition Date 04/09 Replaces 48VT---04SI

Carrier 48VT(N) Troubleshooting, Start-Upchecklist, Unit Operation And Safety Hazard, 48VT--A

Models: 48VT(N)