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Unit Description
26
Zone 1 Cool, Zone 2 Cool, and
Zone 3 Heat
The CIS is closed so high pressure refrigerant
vapor leaves the compressor and flows through
the hot gas line and the open HGS3 into the
Zone 3 evaporator. There the refrigerant heats the
Zone 3 evaporator and condenses into high
pressure liquid. Because the SLS3 is closed, the
liquid refrigerant flows through the LRCV3 and
the remote liquid line to LLS and LLS2.
The LLS is open so some of the refrigerant flows
through the Zone 1 expansion valve into the
Zone 1 evaporator. There the liquid refrigerant
cools the Zone 1 evaporator as it evaporates into
low pressure vapor. The refrigerant returns to the
compressor through the SLCV, and the
accumulator.
The LLS2 is also open so some of the refrigerant
flows through the Zone 2 expansion valve into the
Zone 2 evaporator. There the liquid refrigerant
cools the Zone 2 evaporator as it evaporates into
low pressure vapor. The refrigerant returns to the
compressor through the SLS2, the suction line, the
SLCV2, and the accumulator.
Host Unit and Zone 1 Evaporator
1. Liquid Line Solenoid (LLS)—Open
2. Liquid Return Check Valve (LRCV)—Closed
3. Suction Line Check Valve (SLCV)—Open
4. Suction Line Solenoid (SLS)—Open
5. Hot Gas Solenoid (HGS)—Closed
6. Condenser Inlet Solenoid (CIS)—Closed*
7. Condenser Inlet Check Valve
(CICV)—Closed
8. Receiver Tank Pressure Solenoid
(RTPS)—Open*
9. Condenser Check Valve (CCV)—Closed
10. Bypass Hand Valve
11. Purge Valve (PV)—Open*
12. Purge Check Valve (PCV)—Open
* The microprocessor will open and close these
valves as required to control the head pressure or
compensate for high ambient temperatures.
Zone 2 Evaporator
1C. Zone 2 Liquid Line Solenoid (LLS2)—Open
2C. Zone 2 Liquid Return Check Valve
(LRCV2)— Closed
3C. Zone 2 Suction Line Check Valve
(SLCV2)— Open
4C. Zone 2 Suction Line Solenoid (SLS2)—Open
5C. Zone 2 Hot Gas Solenoid (HGS2)—Closed
Zone 3 Evaporator
1R. Zone 3 Liquid Line Solenoid (LLS3)—Open
2R. Zone 3 Liquid Return Check Valve
(LRCV3)— Open
3R. Zone 3 Suction Line Check Valve
(SLCV3)— Closed
4R. Zone 3 Suction Line Solenoid
(SLS3)—Closed
5R. Zone 3 Hot Gas Solenoid (HGS3)—Open
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...