Refrigeration Service Operations
149
2. Place the valve in the unit and install the
mounting bolts. The arrow on the valve
indicates the direction of flow through the
valve. Make sure that the arrow points in the
proper direction.
3. Solder the refrigeration lines to the valve.
4. Install the coil and connect the wires.
5. Pressurize the refrigeration system and test for
leaks. If no leaks are found, evacuate the
system.
6. Recharge the unit with the proper refrigerant
and check the compressor oil.
Suction Vibrasorber
Removal
1. Pump down the low side and equalize pressure
to slightly positive.
2. Unsolder the suction vibrasorber from the
suction service valve.
3. Unsolder the connection to the suction line on
the other end and remove the vibrasorber from
the unit.
Installation
1. Prepare the suction vibrasorber and tube
fittings for soldering by cleaning the
thoroughly.
2. Solder the vibrasorber to the suction service
valve.
3. Solder the suction vibrasorber connection to
the suction line on the other end.
4. Pressurize the low side and check for leaks. If
no leaks are found, evacuate the system.
5. Open the refrigeration valves and place the
unit in operation.
High Pressure Cutout Switch
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. Front seat the discharge and suction service
valves. Recover the refrigerant remaining in
the compressor.
3. Disconnect the wires and remove the high
pressure cutout switch from the compressor
discharge manifold.
Installation
1. A new high pressure cutout switch does not
have a connector installed. Use the old
connector and just install new wire terminals,
or install a new connector and wire terminals.
See the appropriate Parts Manual for the
correct connector and terminal part numbers.
2. Place a new copper sealing washer on the high
pressure cutout switch.
3. Install the high pressure cutout switch and
torque it to 20 ± 2 ft-lb (27 ± 3 N•m).
4. Connect the wires.
5. Pressurize the compressor and test for leaks.
6. If no leaks are found, open the refrigeration
service valves and place the unit in operation.
High Pressure Relief Valve
Removal
1. Recover the refrigerant charge.
2. Unscrew and remove the high pressure relief
valve.
Installation
1. Apply a refrigerant oil to the O-ring of the
high pressure relief valve.
2. Install and tighten the high pressure relief
valve.
3. Pressurize the refrigeration system and test for
leaks. If no leaks are found, evacuate the
system.
CAUTION: Use a heat sink or wrap
vibrasorber with wet rags to prevent
damaging the vibrasorber.
