Thermo King 914 724, Руководство пользователя

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Refrigeration Service Operations (Rev. 1/99)
52
Installation
1. Place new O-rings in the ORS fittings on the ends of
the drier.
2. Install the new drier and tighten the mounting screws
and nuts.
3. Install and tighten the inlet ORS nut. Hold the drier
with a back-up wrench on the hex behind the ORS
fitting.
4. Release a small amount of refrigerant to purge the air
through the drier, and then tighten the outlet ORS nut.
5. Pressurize the system and inspect for leaks. If no leaks
are found, open the refrigeration valves and place the
unit in operation.
EVAPORATOR COIL
Removal
1. Pump down the low side and equalize the pressure to
slightly positive.
2. Remove the evaporator panel. Disconnect the evapora-
tor fan motor wires. Unbolt the expansion valve from
the mounting bracket.
3. Disconnect the expansion valve from the distributor.
4. Disconnect the hot gas line from the distributor.
5. Remove the defrost termination switch wire.
6. Unsolder the suction line from the evaporator coil.
7. Remove the mounting bolts and slide the coil from the
unit.
Installation
1. Place the coil in the housing.
2. Install the mounting bolts and tighten them.
3. Clean the tubes for soldering.
4. Solder the suction line to the evaporator coil.
5. Connect the hot gas line to the distributor.
6. Connect the expansion valve to the distributor.
7. Connect the defrost termination switch wire.
8. Install the expansion valve on the mounting bracket.
9. Pressurize the system and test for leaks. If no leaks are
found, evacuate the system.
10. Connect the evaporator fan motor wires. Install the
evaporator panel.
11. Open the refrigeration valves and place the unit in oper-
ation. Check the refrigerant charge and the compressor
oil and add as required.
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.
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 mounting bolt, and then
remove the expansion valve from the unit.
Installation
1. Install and bolt 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.