SINGLE TEMPERATURE SYSTEMS
The SLXi, SLXe, SLX, SL, SLe models are one-piece, diesel powered, temperature control units designed for trailers. Each unit
mounts on the front of a trailer with the evaporator portion protruding into the trailer compartment. There are two basic models:
• Model 30: Cooling, heating (hot gas) and defrost (hot gas) on engine operation.
• Model 50: Cooling, heating (hot gas) and defrost (hot gas) on engine operation and electric standby operation.
Power is provided by a water-cooled, direct injection diesel engine. The compressor is connected directly to the engine on the
Model 30. A centrifugal clutch transfers power from the engine to the compressor on the Model 50. Belts transfer power to the
fans and alternator.
During electric standby operation (Model 50 only), an electric motor drives the compressor, fans and alternator using belts. The
centrifugal clutch on the engine isolates the engine from the compressor during electric operation.
MULTI-TEMPERATURE SYSTEMS
TCI and SPECTRUM model systems are designed to control the temperatures in separate compartments. Each system consists
of a host unit that mounts on the front of the trailer.
• TCI and Spectrum model systems consist of a host unit with a single evaporator and one (or two) remote evaporator units.
The host unit contains the diesel engine, compressor, system controls and an evaporator. Refrigerant lines and wire harnesses
connect the host unit to the remote evaporators.
Several compartment configurations are possible. The temperature in each compartment is maintained by a separate controller
(except when the unit is set to control at a single temperature). The systems are flexible enough to allow each compartment to be
set at any temperature. There are two basic models:
• Model 30: Cooling, heating (hot gas) and defrost (hot gas) on engine operation.
• Model 50: Cooling, heating (hot gas) and defrost (hot gas) on engine operation and electric standby operation.
Power is provided by a water-cooled, direct injection diesel engine. The compressor is connected directly to the engine on the
Model 30. A centrifugal clutch transfers power from the engine to the compressor on the Model 50. Belts transfer power to the
fans and alternator.
During electric standby operation (Model 50 only), an electric motor drives the compressor, fans and alternator using belts. The
centrifugal clutch on the engine isolates the engine from the compressor during electric operation.
NOTE: Remote evaporator fans are powered by separate electric motors.
UNIT FEATURES
Compressors
• SL-300, SL-400, SL-400e, SLX, SLXe, SLXi, SL-TCI, SPECTRUM SL/SLX/SLXe/SLXi, models feature a X430,
four-cylinder compressor with 491 cm
3
displacement.
• SL-100, SL-100e, SL-200 and SL-200e models feature a X426CSLS, four-cylinder compressor with 424 cm
3
displacement.
Engines
• SL-100 and SL-200 and models feature a TK 482, four-cylinder, diesel engine rated at 21.3 kW at 1900 rpm.
• SL-100e, SL-200e, SL-300, SL-400, SL-400e, SL TCI, SPECTRUM models feature a TK 486, four-cylinder, diesel engine
rated at 25.3 kW at 2200 rpm.
• SL-100e, SL-200e, SL-400e, SLX/SLXe/SLXi 100/200/300/400 and SPECTRUM models feature a TK 486V (starting in
August 2006), four-cylinder, diesel engine rated at 25.3 kW at 2200 rpm.
Controllers
Thermoguard VI Microprocessor (TG-VI)
The TG-VI controller is used on SL-100, SL-100e, SL-200 and SL-200e models. The TG-VI is a one-piece, programmable
microprocessor that uses external relays to control unit functions to maintain the cargo at the proper temperature. The TG-VI
integrates the following functions: thermostat, digital thermometer, defrost timer, hourmeters, oil pressure gauge, coolant
temperature gauge, voltmeter, tachometer, mode indicator, refrigeration system controller and diagnostic system.
Thermoguard µP-IV, µP-V or µP-VI Microprocessor Controller (µP-IV, µP-V or µP-VI)
A Multi-temp µP-IV is used on SL, TCI and SPECTRUM models. The µP-V controller is used on SL-300 models. The µP-VI
controller is used on SL-400 models.
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