Refrigeration Service Operations
101
Check Valve Replacement
(SLCV, SLCV2, SLCV3, LRCV,
and PVC)
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. Remove the evaporator access panels.
3. Unsolder the lines and remove the check
valve.
NOTE: Disassemble the valve before
unsoldering.
Installation
1. Clean the tubes for soldering.
2. Place the disassembled check valve in
position. The arrow on the valve body
indicates the direction of refrigerant flow
through the valve.
3. Solder the inlet and outlet connections. After
the valve cools, reassemble the valve.
4. Pressurize the low side and test for leaks.
5. If no leaks are found, evacuate the system.
6. Install the evaporator access panels.
7. Open the refrigeration valves and run the unit.
Check the refrigerant charge and compressor
oil.
Condenser Inlet Solenoid Valve
(CIS)
Removal
1. Recover the refrigerant charge.
2. Remove the coil
and disassemble
the valve.
3. Unsolder the hot gas lines from the valve, and
remove the valve from the unit.
Installation
1. Clean the tubes for soldering.
2. Remove the coil
, disassemble
the valve, and
place the valve in position.
3. Solder the inlet and outlet connections. After
the valve cools,
assemble the valve and install
the coil.
4. Pressurize the refrigeration system and test for
leaks.
5. If no leaks are found, evacuate the system.
6. Recharge the unit with proper refrigerant and
check the compressor oil.
Condenser Inlet Check Valve
(CICV) Repair
Removal
1. Recover the refrigerant charge.
2. Remove the cap nut from the check valve, and
remove the spring and seat.
Installation
1. Inspect the inside of the check valve body for
damage or foreign particles which might
adhere to the seat and damage the new seat. If
the body is damaged, replace the check valve.
2. Install the new seat and spring. Place the new
gasket on cap and torque to 45 ft-lb (61 N•m).
3. Pressurize the refrigeration system and test for
leaks.
4. If no leaks are found, evacuate the system.
5. Recharge the unit with proper refrigerant and
check the compressor oil.
CAUTION: Use a heat sink or wrap the
valve with wet rags to prevent damaging
the valve.
CAUTION: Use a heat sink or wrap the
valve with wet rags to prevent damaging
the valve.
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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 ...
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Страница 143: ...143 Model 30 Schematic Diagram Page 1 of 2 ...
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Страница 145: ...145 Model 30 Wiring Diagram Page 1 of 4 ...
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Страница 149: ...149 Model 50 Schematic Diagram Page 1 of 2 ...
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Страница 151: ...151 Model 50 Wiring Diagram Page 1 of 5 ...
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