Thermo King SLXi Spectrum, Руководство по обслуживанию

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Refrigeration Maintenance 10-21
SPECTRUM MULTI-TEMPERATURE REFRIGERATION COMPONENTS
Host Unit Components
These three valves are located in the condenser section of the host unit.
Condenser Inlet Solenoid (CIS)
This valve controls the flow of refrigerant to the condenser. This solenoid is typically energized (closed) when any
compartment is operating in heat or defrost mode. This is a normally open valve. The condenser inlet solenoid is controlled by
an output on the Base Controller and Interface Board.
Receiver Tank Pressure Solenoid (RTPS)
This valve pressurizes the receiver tank to insure adequate refrigerant flow into the heating circuits during heat and defrost
mode operation. This is a normally closed valve. The receiver tank pressure solenoid is controlled by an output on the Base
Controller and Interface Board.
Purge Valve (PV)
The purge valve is energized (open) during heat and defrost mode. This is a normally closed valve. The purge valve is
controlled by an output on the Base Controller and Interface Board.
NOTE: The following components are also located in the host unit. Refer to the above section for details
• Electronic Throttling Valve
• Hot Gas Bypass Valve
Zone Refrigeration Control Components
The following solenoid valves are required for each zone. The Zone 1 valves (and Zone 2 valves if a DE unit) are located in
the host unit. The Zone 2 valves (and Zone 3 valves if present) are located in the remote evaporator(s) for each zone.
Liquid Line Solenoid (LLS)
This valve is energized (open) any time cooling, heating or defrosting is required in its zone. The valve is de-energized when
the zone is in null to stop refrigerant flow in that zone. This is a normally closed valve.
The Zone 1 liquid line solenoid is controlled by an output on the Base Controller and Interface Board. The Zone 2 and Zone
3 liquid line solenoid outputs are located in the Expansion Module.
For SLXe Spectrum PTC and SLXi Spectrum PTC the Liquid Line Solenoid will pulse when either zone 2 or zone 3 has PTC
enabled.
NOTE: PTC stands for Precision Temperature Control.
This algorithm provides top freezing protection for zone 2 or zone 3 when enabled.
Hot Gas Solenoid (HGS)
This valve is energized (open) any time heating or defrosting is required in the zone. This is a normally closed valve.
All hot gas solenoid valve outputs are located in the Expansion Module.
Suction Line Solenoid (SLS)
All zones are capable of reverse cycle heating operation. Reverse cycle heating means that the evaporator coil in the zone in
heat mode is used as the condenser coil during heat operation as long as at least one other zone is operating in cool mode.
The suction line solenoid is energized (closed) when its compartment is operating in heat mode as long as at least one other
zone is operating in cool mode. This is a normally open valve.