Thermo King SLX SPECTRUM, Manual

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7
UNIT DESCRIPTION
UNIT DESCRIPTION
GENERAL INFORMATION
The Thermo King SLX models are one piece,
self-contained, diesel powered cooling/ heating
units operating under the control of a Smart
Reefer 2 (SR-2) programmable microprocessor
controller. The units mount on the front of the
trailer with the evaporator extending through an
opening in the front wall.
There are models:
• SLX-100, 200 and 400 Model 30: Cooling
and heating on diesel engine operation.
• SLX-100, 200, and 400 Model 50: Cooling
and heating on diesel engine or electric
motor operation.
• SLX Spectrum 30: Multiple trailer
compartment cooling and heating on diesel
engine operation.
• SLX Spectrum 50: Multiple trailer
compartment cooling and heating on diesel
or electric motor operation.
During diesel engine operation, the unit will
operate in one of the following modes
depending on the air temperature in the trailer,
as sensed by the microprocessor controller:
Continuous Run Operation
• High Speed Cool
• Low Speed Cool
• Low Speed Modulated Cool (if equipped
with Modulation)
• Low Speed Modulated Heat (if equipped
with Modulation)
• Low Speed Heat
• High Speed Heat
• Defrost
CYCLE-SENTRY Operation (Optional)
• High Speed Cool
• Low Speed Cool
• Null (Engine Off)
• Low Speed Heat
• High Speed Heat
• Defrost
Generally, the unit will operate in low speed,
switching back and forth from cooling to
heating as necessary.
On very hot days, with the setpoint at a low
temperature, the unit may cycle between high
speed cool and low speed cool without
switching into a heating cycle.
Likewise, on very cold days, the unit may cycle
between high speed heat and low speed heat.
The unit may switch into cooling for short
periods of time.
During Standby electric operation, the Model
50 units operate in one of the following modes
to maintain the trailer temperature:
• Cool
• Motor Off
• Heat
• Defrost