Thermo King SPECTRUM TS Series User Manual

Unit Description
43
Figure 14: Zone 1 Cool and Zone 2 Defrost
Zone 1 Cool and Zone 2 Defrost
The CIS is closed so high pressure refrigerant
vapor leaves the compressor and flows through
the DPR to the Zone 2 hot gas line and the open
HGS2 into the Zone 2 evaporator. There, the
refrigerant heats the Zone 2 evaporator and
condenses into high pressure liquid. Because the
SLS2 is open, the liquid refrigerant returns to the
compressor through the SLS2, the second suction
line, SLCV2 and the accumulator. The fans stay
off in the Zone 2 evaporator, allowing the coil to
defrost without warming the load.
Due to the low pressure in the second suction line,
little or no refrigerant goes through the Zone 1
evaporator.
In the condensing unit, the CIS valve closes and
opens to regulate head pressure. The purge valve
is opened continuously during defrost to drain the
condenser coil.
Zone 1 Evaporator
1F. Zone 1 Liquid Line Solenoid (LLS1)-Open
2F. Zone 1 Liquid Return Check Valve
(LRCV1)-Closed
3F. Zone 1 Suction Line Check Valve
(SLCV1)-Open
4F. Zone 1 Suction Line Solenoid (SLS1)-Open
5F. Zone 1 Hot Gas Solenoid (HGS1)-Closed
Zone 2 Evaporator
1R. Zone 2 Liquid Line Solenoid (LLS2)-Open
2R. Zone 2 Liquid Return Check Valve
(LRCV2)-Open
3R. Zone 2 Suction Line Check Valve
(SLCV2)-Open
4R. Zone 2 Suction Line Solenoid (SLS2)-Open
5R. Zone 2 Hot Gas Solenoid (HGS2)-Open
Condensing Unit
6. Condenser Inlet Solenoid (CIS)-Closed/Open
(Pressure Dependent)
7. Condenser Inlet Check Valve
(CICV)-Closed/Open
8.Condenser Check Valve (CCV)-Closed
9. Purge Valve (PV)-Open
10. Purge Check Valve (PCV)-Open
1F
2F
4F
3F
9
6
7
8
3R
5R
4R
2R
1R
5F
10

Thermo King SPECTRUM TS Series Specifications

General

Brand	Thermo King
Model	SPECTRUM TS Series
Category	Industrial Equipment
Language	English