72
TK 56433-5-MM-EN
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 by holding 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.
Expansion Valve Assembly
Removal
1.
Pump down the low side and equalize the pressure
to slightly positive.
2.
Remove the evaporator access panels as needed.
3.
Remove the feeler bulb from the clamp. Note the
position of the feeler bulb on the suction line.
4.
Unsolder the equalizer line, inlet liquid line, and
distributor from the expansion valve.
5.
Remove the expansion valve mounting bolt and
remove the expansion valve from the unit.
Installation
1.
Install and bolt the expansion valve assembly in
the unit.
2.
Solder the equalizer line, inlet liquid line, and
distributor to the expansion valve.
3.
Clean the suction line to a bright polished
condition. Install the feeler bulb clamps and the
feeler bulb on the side of the suction line in its
former position. The feeler bulb must make good
contact with the suction line or operation will be
faulty. Wrap with insulating tape.
Figure 87.
Location of Expansion Valve Bulb
1.
End View
2.
Side View
4.
Pressurize the low side and test for leaks. If no
leaks are found, evacuate the low side.
5.
Reinstall the access panels.
6.
Open the refrigeration valves and place the unit in
operation.
7.
Test the unit to see that the expansion valve is
properly installed.
Heat Exchanger
Removal
1.
Pump down the low side and equalize the pressure
to slightly positive.
2.
Remove the evaporator access panels.
3.
Remove the mounting bolts that hold the heat
exchanger on the bulkhead.
4.
Unsolder the equalizer line from the suction line.
5.
Unsolder the liquid outlet line from the expansion
valve.
6.
Note the position of the feeler bulb on the side of
the suction line. Remove the expansion valve feeler
