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TM 10-4130-239-14
1-9.
EQUIPMENT DATA (CONT)
Refrigerant System (cont)
High pressure switch setting . .286-304 psig (1,972-2,096 kN/M2)
Low pressure switch setting . . . . . . . . 24 psig (165 kN/M2)
Kits
Support kit
Gross weight . . . . . . . . . . . . . . . . . 47 lb (21 kg)
Trailer mounting kit
Gross weight . . . . . . . . . . . . . . . . . 69 lb (31 kg)
See Appendix C located at end of manual for listing of contents of
each kit.
Shippinq Container
Length. . . . . . . . . . . . . . . . . . . . .
41 in (104 cm)
Width. . . . . . . . . . . . . . . . . . . . . . .32 in(81 cm)
Height. . . . . . . . . . . . . . . . . . . . .
44 in (112 cm)
Approximate shipping weight. . . . . . . . . . . 679 lb (308 kg)
Section III.
PRINCIPLES OF OPERATION
1-10.
GENERAL OPERATION.
The water chiller consists of three major
components.
A gasoline engine, a refrigerant system, and a water
system.
a. The gasoline engine powers the refrigerant compressor (B1) and
water pump (P1).
A centrifugal clutch on the engine drive shaft will
allow the engine to start up and gain speed with a load or run even
if the refrigerant compressor locks-up.
To simplify starting the
engine with the rope starter, a pneumatic timer switch (S8) is
incorporated.
This will allow pulling the rope without having to
hold the starter switch (S3) at the same time.
The engine speed is
preset and governor controlled.
b.
The refrigerant system transfers heat absorbed in the
evaporator (El) and discharges that heat to the condenser coil (Cl).
Pressure switches (S1 and S2) prevent damage to components in the
event of failures.
c.
Warm water flows into the water chiller through a hose.
In the
initial starting phase, water is by-passed around the thermostatic
blending valve (V4) by the “START-RUN” water control valve (V5).
Once the engine is up to speed, the
“START-RUN” valve is turned and
water is run through the thermostatic valve.
The valve will auto-
matically either recirculate the water to reduce the temperature, or
will open and allow more warm water into the system.
Cool water will
be available within three minutes of starting at the dispense nozzle.
Water that is not dispensed will be returned to the water tank
1-6
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