Refrigeration Service Operations (Rev 1/99)
69
11. Open the refrigeration valves and place the unit in oper-
ation. Check the refrigerant charge and the compressor
oil and add as required.
Evaporator Components
(Thinline Shown Standard Is Similar)
EXPANSION VALVE ASSEMBLY
Removal
1. Pump down the low side and equalize the pressure to
slightly positive.
2. Remove the feeler bulb from the suction line clamps.
Note the position of the feeler bulb on the suction line.
1. Heat Exchanger
2. Suction Pressure Regulator Valve
3. Expansion Valve
4. Evaporator Coil
3. Disconnect the equalizer line from the expansion valve.
4. Disconnect the liquid line and the distributor from the
expansion valve.
5. Remove the expansion valve from the unit.
Installation
1. Install the expansion valve assembly in the unit.
2. Connect the liquid line and the distributor to the expan-
sion valve.
3. Connect the equalizer line to the expansion valve.
4. 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 the bulb with
insulating tape.
Location of Expansion Valve Bulb
Completely Wrap Bulb with Tape
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