Thermo King KD-II SR, Manual

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7
Unit Description
The KD-II SR is a microprocessor based transport tempera-
ture control system, which utilizes the THERMOGUARD
µP-T microcontroller to manage most of the system’s func-
tions.
The KD-II SR is a one-piece, front-mount, medium capacity
diesel powered cooling and heating system designed espe-
cially for straight trucks. The unit mounts on the front of a
truck with the evaporator portion protruding into the box.
Designed for use with totally chlorine free R-404A refriger-
ant. An optional R-134a unit is also available. There are two
basic models:
• KD-II SR 30: Cooling and heating on engine operation.
• KD-II SR 50: Cooling and hot gas heating on engine
operation and electric standby electric evaporator heat-
ers are optional.
Power is provided by the TK 3.74 three-cylinder, special
clean and silent diesel engine rated at 12.6 continuous
horsepower at 2400 rpm. A belt drive system transfers
energy to the compressor, unit fans and alternator.
Electric standby power (Model 50) is provided by a 5 horse-
power electric motor. A clutch on the diesel engine isolates
the engine during electric standby operation.
Belt driven, dual evaporator fans provide superior air throw.
Exclusive space condenser provides maximum cab clear-
ance and reduced truck body height on conventional chas-
sis. Cube saver evaporator optimizes space below the
evaporator for all types of cargo. Lightweight aluminum
frame allows increased payload.
The continuous monitoring function of the µP-T micropro-
cessor optimizes the Thermo King unit’s performance,
thereby reducing fuel consumption and unit down time. The
unit’s self check can be run before the daily distribution
route to identify any possible malfunctions. TherMax™
defrost/heating system increases unit heating capacity for
faster defrost.
The built-in CYCLE-SENTRY, an exclusive Thermo King
feature, automatically starts and stops the unit according to
temperature demands. In addition, a range of programmable
modes, like high speed pull-down, allow you to tailor your
unit’s performance to the load you are distributing.
The KD-II SR’s µP-T microprocessor continually monitors
unit performance and makes adjustments to pre-pro-
grammed parameters automatically. Troubleshooting is sim-
plified with 40 built-in alarm codes to alert the driver to take
corrective action before a problem develops. Diagnosis is
fast and complete.
For units manufactured prior to April 1997, the clutch
engages fully at 900 ± 100 rpm on engine operation, con-
stantly turning the compressor and fans at both high and low
speed. For units manufactured after April 1997, the clutch
engages at 600 ± 100 rpm.
Thermo King X214 Compressor
The KD-II SR unit features a Thermo King X214, two-
cylinder compressor with 13.92 in.
3
(228 cm
3
)
displacement.
The features of the KD-II SR truck are as follows:
• µP-T Control System
• Choice of Installation for Control Box
• 5 Wire Remote Control (In-Cab or Truck Body Mount)
• Alert System
• Oil Level Detection
• CYCLE-SENTRY (Built-in as Standard)
• Return Temperature Sensor and Display
• Discharge Air Temperature Sensor and Display
• Coil Temperature Sensor
• Engine Coolant Temperature Sensor and Display