123
Remote Evaporator Refrigeration Service
Operations
NOTE: It is generally good practice to replace
the filter drier whenever the high side is opened
or when the low side is opened for an extended
period of time.
Expansion Valve Assembly
Removal
1. Pump down the low side and equalize the
pressure to slightly positive. Remove the
evaporator access panels.
2. Disconnect the liquid inlet line and distributor
from the expansion valve.
3. Remove the feeler bulb from the clamp. Note
the position of the feeler bulb on the suction
line.
4. Disconnect the equalizer line.
5. Remove the expansion valve assembly from
the unit.
Installation
1. Place the expansion valve in the unit.
2. Connect the equalizer line to the expansion
valve.
3. Connect the liquid inlet line and distributor to
the expansion valve.
4. Clean the suction line to a bright polished
condition. Install the feeler bulb clamps and
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 the
operation will be faulty. Wrap it with
insulating tape.
5. Pressurize the low side and test for leaks. If no
leaks are found, evacuate the low side.
6. Install the access panels.
7. Open the refrigeration valves and place the
unit in operation.
8. Test the unit to see that the expansion valve is
properly installed.
Evaporator Coil
Removal
1. Pump down the low side and equalize the
pressure to slightly positive.
2. Disconnect the distributor from the expansion
valve.
3. Remove the insulating tape and feeler bulb
from the suction line. Note the position of the
feeler bulb on the suction line. Disconnect the
equalizer line from the suction line.
4. Heat and unsolder the suction line connection
to the evaporator coil.
5. Remove the mounting bolts and slide the coil
from the housing.
Installation
1. Place the evaporator coil in the evaporator
housing and install the mounting bolts.
2. Clean and solder the suction line connections
to the evaporator coil.
3. Connect the distributor to the expansion valve.
4. Clean the suction line to a bright polished
condition. Install the feeler bulb clamps and
the feeler bulb on the suction line. Locate the
bulb on the side of the suction line in its
former position. The feeler bulb must make
good contact with the suction line or the
operation will be faulty. Wrap it with
insulating tape.
5. Connect the equalizer line to the suction line.
6. Pressurize the low side and test for leaks. If no
leaks are found, evacuate the low side.
7. Install the access panels.
8. Open the refrigeration valves and place the
unit in operation. Check the refrigerant charge
and compressor oil. Add as required.
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...