Carrier 48VT(N)- Manuals

7 3. Attach a clevis of sufficient strength in the middle of the straps. Adjust the clevis location to ensure unit is lifted level with the ground. After the unit is placed on the roof curb or mounting pad, remove the top skid. Step 6 — Connect Condensate Drain NOTE : When installing condensate drai...

8 OUT TEE NIPPLE CAP IN C99020 Fig. 7 -- Sediment Trap 5. Install an accessible, external, manual main shutoff valve in gas supply pipe within 6 ft (1.8 m) of heating section. 6. Install ground--joint union close to heating section between unit manual shutoff and external manual main shut--off valve...

10 Table 1 -- Physical Data -- Unit 48VT--A Cont’d) UNIT SIZE 048090 048115 048130 060090 060115 060130 NOMINAL CAPACITY --- ton 4 4 4 5 5 5 SHIPPING WEIGHT --- lb (kg) 513 233 513 233 513 233 543 246 543 246 546 246 COMPRESSORS Scroll Quantity 1 REFRIGERANT (R --- 410A) Quantity --- lb (kg ) 17.0 7...

11 4. All units must have field--supplied filters or accessory filter rack installed in the return--air side of the unit. Recommended sizes for filters are shown in Table 1. 5. Size all ductwork for maximum required airflow (either heating or cooling) for unit being installed. Avoid abrupt duct size...

12 more than 100 ft (30.5 m) from the unit (as measured along thecontrol voltage wires), use no. 16 AWG color--coded, insulated (35 _ C minimum) wires. Locate the seven (eight on 3--phase) low voltage thermostat leads in 24 volt splice box. See Fig. 10 for connection diagram. Run the low--voltage le...

13 e. Ensure wires do not touch refrigerant tubing or sharp sheet metal edges. f. Inspect coil fins. If damaged during shipping and handling, carefully straighten fins with a fin comb. FIRE, EXPLOSION HAZARD Failure to follow this warning could result in personal injury, death or property damage.Do ...

14 Pipe Plug Manifold A07679 Fig. 11 -- Burner Assembly MANIFOLD BURNER BURNER FLAME C99021 Fig. 12 -- Monoport Burner Check Heating Control Start and check the unit for proper heating control operation as follows (see furnace lighting instructions located on the inside ofthe control access panel): ...

15 REGULATOR COVER SCREW ADJUSTMENTSCREW REGULATOR SPRING(PROPANE - WHITE) NATURAL - SILVER) GAS PRESSURE REGULATOR ADJUSTMENT MANIFOLD PRESSURE TAP INLET PRESSURE TAP ON/OFF SWITCH PLASTIC ( A07751 Fig. 13 -- Single--Stage Gas Valve If larger adjustments are required, change main burner orificesfol...

16 completes the control circuit. The direct--spark ignition systemcycles and the unit returns to normal heating operation. Table 5 – LED Indications STATUS CODE LED INDICATION Normal Operation 2 On No Power Hardware Failure Off Limit Switch Fault 2 Flashes Flame Sense Fault 3 Flashes Four Consecuti...

17 ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death.Before making any indoor wiring adjustments, shut off gas supply. Then disconnect electrical power to the unit and install lockout tag before changing blower speed. ! WARNING This unit has independent ...

27 MAINTENANCE To ensure continuing high performance and to minimize the possibility of premature equipment failure, periodic maintenancemust be performed on this equipment. This combination heating/cooling unit should be inspected at least once each year bya qualified service person. To troubleshoo...

29 BLOWER HOUSING 2 SETSCREWS (HIDDEN) C99085 Fig. 20 -- Removal of Motor and Blower Wheel A07680 Fig. 21 -- Burner Rack Removed FEEDER TUBE STUB TUBE DEFROST THERMOSTAT C99029 Fig. 22 -- Defrost Thermostat Location Outdoor Fan UNIT OPERATION HAZARD Failure to follow this caution may result in damag...

32 C99097 Fig. 24 -- Refrigerant Circuit COMPRESSOR ACCUMULATOR OUTDOOR COIL INDOOR COIL LCS LEGEND HPS – High Pressure Switch LCS – Loss of Charge Switch Accurater ® Metering De vice Arrow indicates direction of flo w TXV in Metering Position Bypass Position HP S C03011 Fig. 25 -- Typical Heat Pump...

33 COMPRESSOR ACCUMULATOR OUTDOOR COIL INDOOR COIL LCS LEGEND HPS – High Pressure SwitchLCS – Loss of Charge Switch Accurater ® Metering De vice Arrow indicates direction of flo w TXV in Bypass Position Metering Position HP S C03012 Fig. 26 -- Typical Heat Pump Operation, Heating Mode UNIT OPERATION...

35 Table 11 – Troubleshooting Guide -- Cooling or Heat Pump Heating Mode SYMPTOM CAUSE REMEDY Compressor and Outdoor fan will not start. Power Failure Call power company. Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker. Defective thermostat, contactor, transformer, or con...

7 3. Attach a clevis of sufficient strength in the middle of the straps. Adjust the clevis location to ensure unit is lifted level with the ground. After the unit is placed on the roof curb or mounting pad, remove the top skid. Step 6 — Connect Condensate Drain NOTE : When installing condensate drai...

8 OUT TEE NIPPLE CAP IN C99020 Fig. 7 -- Sediment Trap 5. Install an accessible, external, manual main shutoff valve in gas supply pipe within 6 ft (1.8 m) of heating section. 6. Install ground--joint union close to heating section between unit manual shutoff and external manual main shut--off valve...

10 Table 1 -- Physical Data -- Unit 48VT--A Cont’d) UNIT SIZE 048090 048115 048130 060090 060115 060130 NOMINAL CAPACITY --- ton 4 4 4 5 5 5 SHIPPING WEIGHT --- lb (kg) 513 233 513 233 513 233 543 246 543 246 546 246 COMPRESSORS Scroll Quantity 1 REFRIGERANT (R --- 410A) Quantity --- lb (kg ) 17.0 7...

11 4. All units must have field--supplied filters or accessory filter rack installed in the return--air side of the unit. Recommended sizes for filters are shown in Table 1. 5. Size all ductwork for maximum required airflow (either heating or cooling) for unit being installed. Avoid abrupt duct size...

12 more than 100 ft (30.5 m) from the unit (as measured along thecontrol voltage wires), use no. 16 AWG color--coded, insulated (35 _ C minimum) wires. Locate the seven (eight on 3--phase) low voltage thermostat leads in 24 volt splice box. See Fig. 10 for connection diagram. Run the low--voltage le...

13 e. Ensure wires do not touch refrigerant tubing or sharp sheet metal edges. f. Inspect coil fins. If damaged during shipping and handling, carefully straighten fins with a fin comb. FIRE, EXPLOSION HAZARD Failure to follow this warning could result in personal injury, death or property damage.Do ...

14 Pipe Plug Manifold A07679 Fig. 11 -- Burner Assembly MANIFOLD BURNER BURNER FLAME C99021 Fig. 12 -- Monoport Burner Check Heating Control Start and check the unit for proper heating control operation as follows (see furnace lighting instructions located on the inside ofthe control access panel): ...

15 REGULATOR COVER SCREW ADJUSTMENTSCREW REGULATOR SPRING(PROPANE - WHITE) NATURAL - SILVER) GAS PRESSURE REGULATOR ADJUSTMENT MANIFOLD PRESSURE TAP INLET PRESSURE TAP ON/OFF SWITCH PLASTIC ( A07751 Fig. 13 -- Single--Stage Gas Valve If larger adjustments are required, change main burner orificesfol...

16 completes the control circuit. The direct--spark ignition systemcycles and the unit returns to normal heating operation. Table 5 – LED Indications STATUS CODE LED INDICATION Normal Operation 2 On No Power Hardware Failure Off Limit Switch Fault 2 Flashes Flame Sense Fault 3 Flashes Four Consecuti...

17 ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death.Before making any indoor wiring adjustments, shut off gas supply. Then disconnect electrical power to the unit and install lockout tag before changing blower speed. ! WARNING This unit has independent ...

27 MAINTENANCE To ensure continuing high performance and to minimize the possibility of premature equipment failure, periodic maintenancemust be performed on this equipment. This combination heating/cooling unit should be inspected at least once each year bya qualified service person. To troubleshoo...

29 BLOWER HOUSING 2 SETSCREWS (HIDDEN) C99085 Fig. 20 -- Removal of Motor and Blower Wheel A07680 Fig. 21 -- Burner Rack Removed FEEDER TUBE STUB TUBE DEFROST THERMOSTAT C99029 Fig. 22 -- Defrost Thermostat Location Outdoor Fan UNIT OPERATION HAZARD Failure to follow this caution may result in damag...

32 C99097 Fig. 24 -- Refrigerant Circuit COMPRESSOR ACCUMULATOR OUTDOOR COIL INDOOR COIL LCS LEGEND HPS – High Pressure Switch LCS – Loss of Charge Switch Accurater ® Metering De vice Arrow indicates direction of flo w TXV in Metering Position Bypass Position HP S C03011 Fig. 25 -- Typical Heat Pump...

33 COMPRESSOR ACCUMULATOR OUTDOOR COIL INDOOR COIL LCS LEGEND HPS – High Pressure SwitchLCS – Loss of Charge Switch Accurater ® Metering De vice Arrow indicates direction of flo w TXV in Bypass Position Metering Position HP S C03012 Fig. 26 -- Typical Heat Pump Operation, Heating Mode UNIT OPERATION...

35 Table 11 – Troubleshooting Guide -- Cooling or Heat Pump Heating Mode SYMPTOM CAUSE REMEDY Compressor and Outdoor fan will not start. Power Failure Call power company. Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker. Defective thermostat, contactor, transformer, or con...