Refrigeration Service Operations
84
Receiver Tank
Removal
1. Recover the refrigerant charge.
2. Unsolder the refrigeration lines from the
receiver tank.
3. Unbolt the mounting brackets and remove the
receiver tank from the unit.
4. Remove the high pressure relief valve from
the receiver tank. It will be installed on the
new receiver tank.
Installation
1. Install the high pressure relief valve on the
new receiver tank. Make sure to use a new
O-ring and coated with refrigerant oil.
2. Place the receiver tank in the unit and install
the mounting bolts and nuts loosely. Position
the receiver tank so that the sight glass is
clearly visible.
3. Solder the refrigeration lines to the receiver
tank.
4. Tighten the receiver tank mounting hardware
securely.
5. Pressurize the refrigeration system and check
for leaks. If no leaks are found, evacuate the
system.
6. Recharge the unit with proper refrigerant.
Filter Drier
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. Disconnect the ORS nuts at the ends of the
drier.
3. Loosen the mounting hardware and remove
the drier.
Installation
1. Place the 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. 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.
Expansion Valve Assembly
NOTE: This procedure applies to the Zone 1 and
Zone 2 expansion valves.
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. Remove the evaporator access panels.
3. Remove the feeler bulb from the clamp. Note
the position of the feeler bulb on the suction
line.
4. Disconnect the equalizer line from the suction
line.
5. Disconnect the inlet liquid line and unsolder
the distributor from the expansion valve.
6. Remove the expansion valve mounting bolt
and remove the expansion valve from the unit.
Installation
1. Install and bolt the expansion valve assembly
in the unit.
2. Connect the inlet liquid line and solder the
distributor to the expansion valve.
3. Connect the equalizer line to the suction line.
4. Clean the suction line to a bright polished
condition. Install the feeler bulb clamps and
the feeler bulb on the side of the suction line
in its former position. The feeler bulb must
make good contact with the suction line or
operation will be faulty. Wrap with insulating
tape.
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...