Refrigeration Service Operations
121
Condenser Inlet Check Valve
Replacement
Removal
1. Remove the refrigerant charge.
2. 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 refrigeration system and test for
leaks.
5. If no leaks are found, evacuate the system.
6. Recharge the unit with the proper refrigerant.
Suction Line Check Valve and
Purge Check Valve Repair
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
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 a new
gasket on the cap and torque to 45 ft-lb
(61 N•m).
3. Pressurize the low side and test for leaks.
4. If no leaks are found, evacuate the system.
5. Open the refrigeration valves and place the
unit in operation. Check the compressor oil.
Suction Line Check Valve and
Purge Check Valve
Replacement
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. 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. Open the refrigeration valve and place the unit
in operation. Check the compressor oil.
Содержание 920000
Страница 4: ......
Страница 10: ...Table of Contents 10...
Страница 22: ...Specifications 22...
Страница 41: ...Unit Description 41 Unit Photographs Figure 12 Front View Figure 13 Top View ARD026 AGA267...
Страница 42: ...Unit Description 42 Figure 14 Engine Side Door Open ARD041...
Страница 76: ...Electrical Maintenance 76...
Страница 132: ...Hilliard Clutch Maintenance 132...
Страница 134: ...Structural Maintenance 134...
Страница 146: ...Refrigeration Diagnosis 146...
Страница 148: ...Remote Evaporator Specifications 148...
Страница 150: ...Remote Evaporator Maintenance Inspection Schedule 150...
Страница 154: ...Remote Evaporator Unit Description 154...
Страница 158: ...Remote Evaporator Structural Maintenance 158...
Страница 160: ...Remote Evaporator System Diagnosis 160...
Страница 164: ...Wiring and Schematic Diagrams Index 164...
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Страница 180: ...180 MD RD MT Model 50 w In Cab Wiring Diagram Page 1 of 3...
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Страница 183: ...183 MD RD MT Model 50 w In Cab CYCLE SENTRY Schematic Diagram Page 1 of 2...
Страница 184: ...184 MD RD MT Model 50 w In Cab CYCLE SENTRY Schematic Diagram Page 2 of 2...
Страница 185: ...185 MD RD MT Model 50 w In Cab CYCLE SENTRY Wiring Diagram Page 1 of 3...
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Страница 188: ...188 MD RD MT Model 50 CYCLE SENTRY Wiring Diagram Page 1 of 3...
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