Refrigeration Service Operations
142
6. If no leaks are found, evacuate the system.
7. Recharge the unit with proper refrigerant and
check the compressor oil.
Bypass Check Valve
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. Close the bypass service valve.
3. Unsolder the bypass check valve line from the
bypass check valve. Use a heat sink on the
bypass check valve.
4. Unsolder and remove the bypass check valve
from the receiver tank. Use a heat sink on the
bypass check valve.
Installation
1. Solder the bypass check valve onto the
receiver tank. Use a heat sink on the bypass
check valve.
2. Solder the bypass check valve line to the
bypass check valve. Use a heat sink on the
bypass check valve.
3. Pressurize the low side and test for leaks. If no
leaks are found, evacuate the system.
4. Open the bypass service valve and place the
unit in operation.
Receiver Tank
Removal
1. Recover the refrigerant charge.
2. Unsolder the inlet, outlet, and bypass check
valve lines from the receiver tank. Use a heat
sink on the bypass check valve.
3. Unsolder and remove the bypass check valve
from the receiver tank. Use a heat sink on the
bypass check valve.
4. Remove the high pressure relief valve from
the receiver tank.
5. Unbolt the mounting brackets and remove the
receiver tank from the unit.
Installation
1. Install the high pressure relief valve in the
receiver tank.
2. Solder the bypass check valve onto the
receiver tank. Use a heat sink on the bypass
check valve.
3. Place the receiver tank in the unit and install
the mounting bolts and nuts loosely.
4. Solder the inlet, outlet, and bypass check
valve lines to the receiver tank. Use a heat
sink on the bypass check valve.
5. Tighten the receiver tank mounting hardware
securely.
6. Pressurize the refrigeration system and check
for leaks. If no leaks are found, evacuate the
system.
7. Recharge the unit with proper refrigerant and
check the compressor oil.
Filter-Drier
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. Disconnect the nuts at the ends of the drier.
3. Loosen the mounting hardware and remove
the drier.
Installation
1. Place the new O-rings in the ORS fittings on
the ends of the drier.
2. Install the new drier and tighten the mounting
hardware.
3. Install and tighten the ORS nuts. Hold the
drier with a back-up wrench on the hex behind
the ORS fitting.
4. Pressurize the low side and inspect for leaks.
If no leaks are found, evacuate the low side.
5. Open the refrigeration valves and place the
unit in operation.
