Remote Evaporator Refrigeration Service Operations
125
Liquid Return Valve
Replacement
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. Remove the 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 low side.
6. Install the access panels.
7. Open the refrigeration valves and run the unit.
Check the refrigerant charge and compressor
oil.
Heat Exchanger
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. Remove the access panels.
3. Remove the mounting hardware used to
mount heat exchanger to the panel.
4. Unsolder the refrigeration lines from the heat
exchanger ports and remove it from the unit.
Installation
1. Clean the tubes for soldering.
2. Position the tubes in the proper ports on the
heat exchanger.
3. Reinstall the mounting hardware used to
mount heat exchanger to the panel.
4. Solder the refrigeration lines from the heat
exchanger ports to the tubes.
5. Pressurize the refrigeration system and test for
leaks.
6. If no leaks are found, evacuate the low side.
7. Install the access panels.
8. Open the refrigeration valves and run the unit.
Check the refrigerant charge and compressor
oil. Add as required.
CAUTION: Use a heat sink to prevent
damage to nearby valves.
CAUTION: Use a heat sink to prevent
damage to nearby valves.
Summary of Contents for Spectrum DE 30-2
Page 4: ...4...
Page 12: ...Safety Precautions 12...
Page 16: ...Specifications 16...
Page 31: ...Unit Description 31 1 Access Panels 2 Defrost Dampers Figure 12 Back View of Unit 1 2 AGA215...
Page 42: ...Operating Instructions 42...
Page 48: ...Electrical Maintenance 48...
Page 106: ...Structural Maintenance 106...
Page 110: ...Mechanical Diagnosis 110...
Page 114: ...Remote Evaporator Specifications 114...
Page 116: ...Remote Evaporator Maintenance Inspection Schedule 116...
Page 122: ...Remote Evaporator Electrical Maintenance 122...
Page 126: ...Remote Evaporator Refrigeration Service Operations 126...
Page 128: ...Remote Evaporator Structural Maintenance 128...
Page 130: ...Remote Evaporator System Diagnosis 130...
Page 134: ...Wiring and Schematic Diagrams Index 134...
Page 135: ...135 Schematic Diagram Page 1 of 2...
Page 136: ...136 Schematic Diagram Page 2 of 2...
Page 137: ...137 Wiring Diagram Page 1 of 4...
Page 138: ...138 Wiring Diagram Page 2 of 4...
Page 139: ...139 Wiring Diagram Page 3 of 4...
Page 140: ...140 Wiring Diagram Page 4 of 4...