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REFRIGERATION
Self Contained Models Use pressure gauges to set pressure control.
Refrigeration R404 Charge
Low Pressure Switch Cut In
Low Pressure Switch Cut Out
High Pressure Switch Cut Out
TXV Setting (turns from full open)
(Turn screw counter clockwise to stop
for full open position)
The self-contained models are shipped from the factory with a completely operational 404A refrigeration
system and require no modifications or adjustments upon installation. Case must be installed as per the
installation section of this manual to provide proper condensing air cooling.
Self Contained Refrigeration Operation
The unit temperature is controlled by the low pressure side of a dual high/low pressure switch. The
compressor will run until either the minimum run timer times out (approx 10 min) or the suction pressure
reaches the set cut out point at which time the compressor turns off. The compressor will remain off until
the suction pressure rises and reaches the set cut in point of the pressure switch at which time the
compressor turns on.
Note: The condenser fan runs continuously.
This unit also has a defrost timer that will shut the compressor off a set number of times per day to insure a
full defrost occurs. The compressor will remain off until the either the off time is reached or until the
temperature sensor on the coil reaches a set temperature which ever happens first.
Remote Models Use pressure gauges to set pressure control.
Refrigeration R404 Charge
Remote Low Press. Switch Cut In
Remote Low Press. Switch Cut Out
Remote High Press. Switch Cut Out
TXV Setting (turns from full open)
(Turn screw counter clockwise to stop
for full open position)
SSRSP5052 SSRSP5952 SSRSP7752
32 OZ
82 psi
48 psi
1.5
SSRSP5052 SSRSP5952 SSRSP7752
CHARGED IN FIELD
1.5
- 7 -
34 OZ
82 psi
45 psi
1.5
50
30
400 psi
1.5
36 OZ
82 psi
51 psi
1.5
1.5
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