Thermo King Super II SR+, Manual

Page: 93 / 145

Refrigeration Service Operations (Rev 6/98)
83
5. Pressurize the refrigeration system and test for leaks.
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. Unscrew the flare nut from the check valve.
4. Unscrew the check valve from the bypass valve.
CAUTION: The receiver tank outlet tube may be
bent if a back-up wrench is not used on the fitting.
Installation
1. Coat the fittings on the bypass check valve with com-
pressor oil and install on the service valve fitting.
Tighten it securely, and use a back-up wrench.
2. Install and tighten the bypass flare nut on the check
valve outlet. Hold the check valve with a back-up
wrench on the hex.
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 condenser check valve line from the
receiver tank. Disconnect the filter drier inlet and the
bypass check valve lines. Remove the check valve from
the receiver tank.
3. Unbolt the mounting brackets and remove the receiver
tank from the unit.
Installation
1. Coat the bypass check valve fittings with compressor
oil. Install the check valve on the receiver tank outlet
tube. Tighten securely, holding the hex on the receiver
tank outlet tube with a back-up wrench.
2. Place the receiver tank in the unit and install the mount-
ing bolts and nuts loosely. Position the receiver tank so
that the sight glass is clearly visible.
3. Solder the condenser check valve line to the receiver
tank.
4. Connect the bypass check valve and filter drier inlet
lines.
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.