Hose/Line HVAC: Service and Repair

TIGHTENING TORQUE OF REFRIGERATION LINES

REFRIGERANT LINES REPLACEMENT

1. DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM

2. REPLACE FAULTY TUBE OR HOSE

NOTE: To prevent the intrusion of moisture or dirt, caps should be placed on hose or tube ends immediately.

3. TORQUE CONNECTIONS TO SPECIFIED TORQUE

NOTE: Cap the open fittings immediately to keep moisture or dirt out of the system.

Compressor x Discharge hose
Torque: 25 N-m (250 kgf.cm, 18 ft.lbf)
Compressor x Suction hose
Torque: 25 N-m (250 kgf-cm, 18 ft-lbf)
Condenser x Discharge tube
Torque: 10 N-m (100 kgf.cm, 7 ft.lbf)
Condenser x Liquid tube (union nut)
Torque: 14 N-m (140 kgf.cm, 10 ft-lbf)
Condenser x Liquid tube (bolt)
Torque: 10 N-m (100 kgf.cm, 7 ft.lbf)
Receiver x Liquid tube
Torque: 5.4 N-m (55 kgf.cm, 48 in..lbf)
Cooling unit x Liquid tube
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)
Expansion valve x Liquid tube
Torque: 14 N.m (140 kgf.cm, 10 ft.lbf)
Expansion valve x Evaporator
Torque: 22 N.m (225 kgf.cm, 16 ft.lbf)
Evaporator x Tubes
Torque: 5.4 N.m (55 kgf.cm, 48 in..lbf)
Cooling unit x Suction tube
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)
EPR x Equalizer tube
Torque: 23 N.m (235 kgf.cm, 17 ft.lbf)
EPR x Suction tube (union nut)
Torque: 32 N.m (330 kgf.cm, 24 ft.lbf)
EPR x Suction tube (bolt)
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)
Liquid line
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)
Discharge line
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)
Suction line
Torque: 10 N.m (100 kgf.cm, 7 ft.lbf)

4. EVACUATE AIR IN REFRIGERATION SYSTEM AND CHARGE WITH REFRIGERANT
Specified amount:
950 ± 50 g (33.51 ± 1.76 oz)

5. INSPECT FOR LEAKAGE OF REFRIGERANT
Using a gas leak detector, check for leakage of refrigerant.

6. INSPECT AIR CONDITIONING OPERATION