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2-7
62-11039
2.3 CONDENSING SECTION
The condensing section (Figure 2-2) consists of an
engine--compressor drive package, condenser fan,
condenser/radiator coil, refrigerant controls, piping,
wiring, defrost air switch, and associated components.
The drive equipment includes the engine, generator, air
cleaner, muffler, coolant overflow bottle, and drive belts.
Refrigeration components mounted in the condensing
section include: the compressor, defrost air switch, suc-
tion modulation valve, filter drier, and receiver.
2.3.1 Condenser Coil
The condenser coil is of the tube in fin type and acts as a
heat exchanger in which the compressed refrigerant
gas is condensed into a liquid and lowered in tempera-
ture. Air movement over the condenser is provided by a
two electric motor driven fans mounted in the condens-
ing section.
2.3.2 Engine
The engine (Refer to Section 2.9) gives excellent fuel
economy and has easy starting characteristics. It is
equipped with spin-on lube oil and fuel oil filters for
easier filter changes.
Engine Transducers and Sensors:
a. Engine RPM Sensor (ENRPM)
Provides micro with engine rpm information to be
displayed and recorded in the data recorder. It is located
on the front of the engine near the generator.
b. Engine Oil Pressure Switch (ENOPS)
This normally open switch allows the engine to operate
when oil pressure is above 15
¦
3 PSIG (1.02
¦
0.2
Bars). The switch will close and automatically stop the
engine when pressure drops below 12.3
¦
3 PSIG (0.84
Bar). There is a 15 second delay after the engine starts
to allow the oil pressure to build up before the
microprocessor looks at the input from this switch. The
switch is located on the front of the engine below the fuel
solenoid.
c. Engine Oil Level Switch (ENOLS) (Optional)
ENOLS sets off Alarm when oil level is low. Located on
the oil pan next to the oil fill.
d. Engine Coolant Temperature Sensor (ENCT)
Provides micro with engine coolant temperature
information to be displayed and recorded in the data
recorder . The sensor is located on the starter side of
the engine near the #4 Injector.
e. Engine Coolant Level Sensor (ENCLS)
(Optional)
Sets off Alarm when coolant level is low. Located in the
coolant bottle.
2.3.3 Compressor
The compressor assembly includes the refrigerant com-
pressor, suction and discharge service valves, high
pressure switch, compressor discharge thermistor and
the suction and discharge pressure transducers. The
compressor draws refrigerant gas from the evaporator
and delivers it to the condenser at an increased temper-
ature and pressure. The pressure is such that refriger-
ant heat can be absorbed by the surrounding air at
ambient temperatures.
Compressor Unloaders
The refrigeration compressor used is a 41cfm model
06D, equipped with unloaders as standard equipment.
Unloaders are used as a compressor capacity control to
unload the compressor during periods of reduced loads.
This provides closer temperature control, reduces
potential for top freezing and reduces power required to
operate
the
compressor;
thus
reducing
fuel
consumption.
a. Major Working Parts
1. Solenoid and valve system
2. Spring loaded piston type bypass control valve
3. Spring loaded discharge check valve
Summary of Contents for VECTOR 1800 MT
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Page 2: ...OPERATION SERVICE MANUAL for VECTOR 1800 MT Trailer Multi Temp Refrigeration Units ...
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