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#7040748 - Revision A - September, 2016
MODEL UW-24
MODEL UW-24
Sealed System Information
Capillary Tubes & Heat Exchangers (Figure 3-4)
The high-pressure warm liquid refrigerant travels
through the long skinny capillary tube which is soldered
to the suction tube (t
hese two tubes soldered together
create the heat exchanger).
As the warm liquid refriger-
ant travels through the capillary tube it gives up heat to
the cool refrigerant gas traveling through the suction
tube and the pressure drops, so it is a low-pressure/-
cool liquid before it enters the evaporator.
Evaporators (Figure 3-5)
As the low-pressure/cool liquid refrigerant enters the
evaporator, it vaporizes. This is caused by a dramatic
pressure change, occurring when the refrigerant from
the smaller diameter capillary tubing enters the larger
diameter evaporator tubing. This refrigerant vapor trav-
els through the evaporator, absorbing heat from the
compartment, gradually converting the refrigerant to a
cool gas. This cool refrigerant gas then enters the suc-
tion tube.
Suction Tubes (Figure 3-6)
The cool gas travels through the suction tube which is
soldered to the capillary tube
.
As this cool refrigerant
gas travels through the suction tube it absorbs heat
from the warm liquid refrigerant traveling through the
capillary tube, making it a luke warm gas.
(There is a
suction tube “T” connection that diverts the two sepa-
rate suction tubes from the evaporators to one suction
tube that enters the compressor.)
The lukewarm refrig-
erant gas is pulled back to the compressor (via vacuum
force), where the process begins again.
Figure 3-4. Capillary Tubes & Heat Exchangers
Figure 3-5. Evaporators
Figure 3-6. Suction Lines
COMPRESSOR
AWECO VALVE
CONDENSER
FILTER-DRIER
FRAME HEATER (HOT GAS)
CAPILLARY TUBE
HEAT
EXCHANGER
SUCTION LINE
(
NOTE:
ONE SIDE OPEN AT A TIME.)
LOWER
EVAPORATOR
UPPER
EVAPORATOR
"T" CONNECTOR
CAPILLARY TUBE
HEAT
EXCHANGER
SUCTION LINE
COMPRESSOR
AWECO VALVE
CONDENSER
FILTER-DRIER
FRAME HEATER (HOT GAS)
CAPILLARY TUBE
(
NOTE:
ONE SIDE OPEN AT A TIME.)
LOWER
EVAPORATOR
UPPER
EVAPORATOR
CAPILLARY TUBE
COMPRESSOR
AWECO VALVE
CONDENSER
FILTER-DRIER
FRAME HEATER (HOT GAS)
CAPILLARY TUBE
(
NOTE:
ONE SIDE OPEN AT A TIME.)
CAPILLARY TUBE
