TM 5-6675-319-14
a.
Compressor.
Compresses freon gas for refrigeration process. It is a sealed
unit driven by an electric motor.
b . Condenser.
C o n t a i n s t h e c o m p r e s s e d l i q u i d r e f r i g e r a n t . A f t e r e x i t i n g t he
compressor unit, the compressed refrigerant gives up heat through the air-cooled
c o n d e n s e r c o i l s.
L i q u i d r e c e i v e r .
Acts as a storage tank and contains approximately 1 lb of
l i q u i d r e f r i g e r a n t i n e x c e s s o f a c t u a l r e q u i r e m e n t s .
d.
Refrigerant sight gage.
Indicates if freon lines are charged to capacity.
With compressor running, a solid stream of liquid refrigerant should be visible in
the sight gage .
If bubbles are present, the system is not fully charged.
e .
D r y e r f i l t e r .
Removes moisture from liquid refrigerant lines between liquid
receiver and thermostatic expansion valves .
f . S o l e n o i d v a l v e s.
Control liquid refrigerant flow to heat exchanger and
c a b i n e t e v a p o r a t o r c o i l s.
g.
Thermostatic expansion valve.
Thermostatically and pressure-regulated ball
valve creates a pressure drop in refrigerant flow . The pressure drop changes the
refrigerant from liquid to gas, and heat is absorbed during the process.
h . C a b i n e t e v a p o r a t o r.
L o c a t e d i n t h e r e f r i g e r a t i o n c a b i n e t . I t s c o i l s a b s o rb
heat from the cabinet.
The evaporator coils contain refrigerant which is vaporized
by its expansion valve.
i .
Heat exchanger.
Contains evaporator coils inside a solid housing which
absorbs heat from water pumped through housing.
T h e e v a p o r a t o r c o i l s c o n t a i n r e f r i-
gerant which is vaporized by an expansion valve.
The heat exchanger also contains
an immersion-type resistance heater to warm the water if temperature is too low.
3-3.2 Recycling System.
Provides a temperature-controlled water bath to maintain
a proper processing temperature for solution trays located in the sink.
I t c o n s i s ts
of a magnetic-drive,
centrifugal pump which recirculates water from the sink,
through the heat exchanger, and back to the sink.
3-5
c .
