Refrigeration Service Operations
95
3. Disconnect the wires and remove the switch
from the compressor discharge manifold.
Installation
1. Apply a refrigerant Loctite to the threads of
the switch.
2. Install and tighten the switch and reconnect
the wires.
3. Pressurize the compressor and test for leaks.
4. If no leaks are found, open the refrigeration
service valves and place the unit in operation.
Check the refrigerant charge and the
compressor oil, and add as required.
Discharge Pressure Sensor
Removal
1. Recover the refrigerant charge.
2. Disconnect the wire connector from the
discharge pressure sensor.
3. Remove the mounting clamp (if used) from
the discharge pressure sensor.
4. Unscrew the discharge pressure sensor from
the adapter on the end of the tube. Use a
backup wrench to hold the adapter.
5. Remove the discharge pressure sensor.
Installation
1. Apply refrigerant Loctite to the threads on the
discharge pressure sensor.
2. Screw the discharge pressure sensor into the
adapter on the end of the tube. Use a backup
wrench to hold the adapter.
3. Install the mounting clamp (if used) for the
discharge pressure sensor.
4. Recharge the unit with the proper refrigerant
and check the compressor oil.
High Pressure Relief Valve
Removal
1. Recover the refrigerant charge.
2. Unscrew and remove the high pressure relief
valve. It is located near the top of the receiver
tank.
Installation
1. Apply a refrigerant oil to the O-ring of the
high pressure relief valve.
2. Install and tighten the high pressure relief
valve.
3. Pressurize the refrigeration system and test for
leaks. If no leaks are found, evacuate the
system.
4. Recharge the unit with the proper refrigerant
and check the compressor coil.
Throttling Valve
See Figure 63 on page 96 for an illustration of the
throttling valve assembly.
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. Front seat the discharge and suction service
valves. Recover the refrigerant remaining in
the compressor.
3. Remove the suction service valve.
4. Unbolt and remove the throttling valve from
the unit.
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Страница 4: ...4 ...
Страница 25: ...Unit Description 25 Figure 3 Zone 1 Cool Zone 2 Cool and Zone 3 Cool Zone 3 Zone 2 Zone 1 AGA168 ...
Страница 27: ...Unit Description 27 Figure 4 Zone 1 Cool Zone 2 Cool and Zone 3 Heat Zone 3 Zone 2 Zone 1 AGA169 ...
Страница 30: ...Unit Description 30 Figure 9 Front View AJA920 ...
Страница 31: ...Unit Description 31 1 Access Panels 2 Defrost Damper Figure 10 Back View 1 2 ARA104 ...
Страница 114: ...Mechanical Diagnosis 114 ...
Страница 116: ...Electric Standby Diagnosis 116 ...
Страница 120: ...Remote Evaporator Specifications 120 ...
Страница 122: ...Remote Evaporator Maintenance Inspection Schedule 122 ...
Страница 128: ...Remote Evaporator Electrical Maintenance 128 ...
Страница 132: ...Remote Evaporator Refrigeration Service Operations 132 ...
Страница 134: ...Remote Evaporator Structural Maintenance 134 ...
Страница 136: ...Remote Evaporator System Diagnosis 136 ...
Страница 140: ...Index 140 ...
Страница 142: ......
Страница 143: ...143 Model 30 Schematic Diagram Page 1 of 2 ...
Страница 144: ...144 Model 30 Schematic Diagram Page 2 of 2 ...
Страница 145: ...145 Model 30 Wiring Diagram Page 1 of 4 ...
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Страница 147: ...147 Model 30 Wiring Diagram Page 3 of 4 ...
Страница 148: ...148 Model 30 Wiring Diagram Page 4 of 4 ...
Страница 149: ...149 Model 50 Schematic Diagram Page 1 of 2 ...
Страница 150: ...150 Model 50 Schematic Diagram Page 2 of 2 ...
Страница 151: ...151 Model 50 Wiring Diagram Page 1 of 5 ...
Страница 152: ...152 Model 50 Wiring Diagram Page 2 of 5 ...
Страница 153: ...153 Model 50 Wiring Diagram Page 3 of 5 ...
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Страница 155: ...155 Model 50 Wiring Diagram Page 5 of 5 ...