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Unit Description
General Description
The RD-II MAX is a one-piece, front-mount,
medium capacity diesel powered cooling and
heating system designed especially 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 refrigerant. An optional R-134a unit is
also available. There are two basic models:
RD-II MAX model 30: Cooling and heating on
engine operation.
RD-II MAX model 50: Cooling and hot gas
heating on engine operation and electric standby
electric evaporator heaters are optional.
Power to the system is provided by a Thermo
King TK 3.95, water-cooled, 3 cylinder diesel
engine rated at 11.2 continuous horsepower
(8.35 kW) at 2400 RPM. A belt drive system
transfers power to the compressor, unit fans and
alternator.
Electric standby power (model 50) is provided by
a 7.5 horsepower 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 clearance and reduced truck body
height on conventional chassis. Cube saver
evaporator optimizes space below the evaporator
for all types of cargo. Lightweight aluminum
frame allows increased payload.
The RD-II MAX operates under the control of a
TG-V microprocessor controller. The built-in
microprocessor controller simplifies system
monitoring and troubleshooting. 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 clutch engages fully at 900 ± 100 RPM on
engine operation, constantly turning the
compressor and fans at both high and low speed.
X426 Compressor
The RD-II MAX features the X426, 4 cylinder
compressor with 25.9 cu. in (424 cc)
displacement.
Microprocessor Controller
TG-V
Thermo King has applied the newest
technological advances to develop a
programmable microprocessor controller that
controls unit functioning and displays operating
information quickly and accurately.
Features include:
Thermometer:
Displays return air temperature
with 0.1 degree accuracy.
Thermostat:
Provides temperature control from
-20 to 80 F (-28 to 28 C), in 0.5 degree
increments.
Defrost Control:
If the evaporator coil temperature
is below 42 F (6 C), Defrost is automatically
initiated every 4 hours during pulldown until the
return air temperature is in-range. At in-range
temperatures (between approximately 7 degrees
above and 7 degrees below setpoint), the
controller is programmable for 2 to 16 hours in 2
hour increments. The Defrost interval is set at the
factory, but can be reprogrammed by your
Thermo King dealer.
Fuel Saver:
Can be programmed to delay high
speed operation for optimum fuel economy.
Alarm:
Can detect and display alarm conditions
including sensor, microprocessor and defrost
termination failures.
The TG-V Controller is programmed to lock out
High Speed Heat if set below 15 F (-9.4 C).
Cab Control Box:
The Cab Control Box allows the
driver to control and monitor some of the unit
functions from inside the cab. The auto start
system controls the preheat, run, and start relays
to automatically start the unit when all On/Off
switches are in the On position.
Summary of Contents for 914970
Page 3: ...3...
Page 10: ...Table of Contents 10...
Page 40: ...Operating Instructions 40...
Page 82: ...Electronic Controls 82...
Page 92: ...Electrical Maintenance 92...
Page 124: ...Refrigeration Maintenance 124...
Page 140: ...Hilliard Clutch Maintenance 140...
Page 160: ...Refrigeration Diagrams 160...
Page 163: ...Index 163 W wiring 85 wiring diagrams 165...
Page 164: ...Index 164...
Page 166: ...Wiring and Schematic Diagrams Index 166...
Page 167: ...167 Cab Control RD Wiring Diagram...
Page 168: ...168 RD w o Thermostat Cab Control Schematic...
Page 169: ...169 RD Cab Box Wiring Diagram...
Page 170: ...170 RD Cab Control w Thermostat Schematic Diagram...
Page 171: ...171 RD 50 STD 3 Phase Wiring Diagram Page 1 of 2...
Page 172: ...172 RD 50 STD 3 Phase Wiring Diagram Page 2 of 2...
Page 173: ...173 RD 50 STD 3 Phase Schematic Diagram Page 1 of 2...
Page 174: ...174 RD 50 STD 3 Phase Schematic Diagram Page 2 of 2...
Page 175: ...175 RD 30 STD Wiring Diagram Page 1 of 2...
Page 176: ...176 RD 30 STD Wiring Diagram Page 2 of 2...
Page 177: ...177 RD 30 STD Schematic Diagram Page 1 of 2...
Page 178: ...178 RD 30 STD Schematic Diagram Page 2 of 2...
Page 179: ...179 RD 30 C S Wiring Diagram Page 1 of 2...
Page 180: ...180 RD 30 C S Wiring Diagram Page 2 of 2...
Page 181: ...181 RD w CYCLE SENTRY Schematic Diagram Page 1 of 2...
Page 182: ...182 RD w CYCLE SENTRY Schematic Diagram Page 2 of 2...
Page 183: ...183 RD 50 C S 3 Phase Wiring Diagram Page 1 of 2...
Page 184: ...184 RD 50 C S 3 Phase Wiring Diagram Page 2 of 2...
Page 185: ...185 RD w CYCLE SENTRY Schematic Diagram Page 1 of 2...
Page 186: ...186 RD w CYCLE SENTRY Schematic Diagram Page 2 of 2...