18
TK 56433-5-MM-EN
Unit Description
Unit Overview
The Thermo King SLXi-DRC is a one piece, self-
contained, diesel powered, air cooling/heating units
operating under the control of the SMART REEFER 3
(SR-3) programmable microprocessor controller. The
unit mounts on the front of the container with the
evaporator extending through an opening in the front
wall.
The unit features the quiet running Thermo King
TK486V25X engine, and the Thermo King X430P
reciprocating compressor.
Figure 1. Front View
Design Features
•
SMART REEFER SR-3 Controller
•
OptiSet™ Plus
•
ServiceWatch™ Data Logger
•
CargoWatch™ Data Logger
•
Electronic Throttling Valve (ETV)
•
EMI-3000
•
Solar Panel (36 W)
Diesel Engine
The unit uses the TK486V25X, a 4-cylinder, water
cooled, direct injection diesel engine.
The engine is coupled directly to the compressor. Belts
transmit power to the unit fans, alternator, and water
pump.
Figure 2. TK486V25X
Thermo King X430 Series Reciprocating
Compressor
The unit is equipped with a Thermo King X430 Series
four cylinder reciprocating compressor with 30.0 cu. in.
(492 cm
3
) displacement.
Electronic Throttling Valve
The Electronic Throttling Valve (ETV) is a variable
position valve operated by a stepper motor. The ETV is
located in the suction line between the accumulator
and the suction vibrasorber. Discharge and suction
pressure transducers supply pressure information to
the microprocessor control system. The
microprocessor controls the electronic throttling valve
directly. The ETV replaces the mechanical throttling
valve used in other units.
The ETV system provides enhanced control of the
refrigeration system as follows:
•
S
Su
uccttiio
on
n P
Prre
essssu
urre
e C
Co
on
nttrro
oll:: The suction pressure
control algorithm is the primary control used to
obtain maximum capacity. This allows the
refrigeration system to fully utilize the power
capabilities of the engine under varying conditions.
•
D
Diisscch
ha
arrg
ge
e P
Prre
essssu
urre
e P
Prro
otte
eccttiio
on
n:: This protection
algorithm provides an additional measure of
protection against high discharge pressures and
possible compressor damage. It will prevent
shutdowns in high ambient temperatures by
