OVERVIEW
This section is limited to the control settings
required prior to and during start-up. T h e s e
include:
Compressor Oil Failure .................................1
Pressure Settings............................................1
Plate Subcooling Controls .............................1
Shell and Tube Subcooling Controls ............1
Compound Rack, Additional Settings ...........1
EPR Settings..................................................2
Winter Condensing Pressure Controls...........2
Mechanical Low Pressure Controls...............2
Alco ......................................................2
Others....................................................4
Condenser Settings ........................................8
Merchandiser Settings ...................................9
PRESSURE SETTINGS
C o m p re s s o r Oil Failure Safety requires
manual reset.
Compressor Cut-in Cut-out Time Delay
(psig) (psig) (seconds)
Copeland 12-14 7-9 105-135
Carlyle 8-11 4-8 45-75
High Pre s s u re Safety for both R22 and
R404A/507 is 395 psig. Differential is fixed.
High Suction Pre s s u re is set at 50% above
Design Pressure or to customer specification.
Satellite Low Pressure Controls
Low-end Satellites
Low Temperature Cut-out 1 psig
High-end Satellite
Refrigerant Cut-out Cut-in
(psig) (psig)
R502 36 59
R22 29 49
PLATE SUBCOOLING CONTROLS
Thermostat setting is 50˚F with minimum dif-
ferential, or customer specifications.
The TEV should be set with the highest possi-
ble superheat that will still maintain the
desired liquid temperature.
EPR setting is listed on the store legend.
S H E L L AND TUBE SUBCOOLING
CONTROLS
Thermostat setting is 50˚F with minimum dif-
ferential, or customer specifications.
The TEV should be set with the highest possi-
ble superheat that will still maintain the
desired liquid temperature.
EPR setting is listed on the store legend.
COMPOUND RACK, A D D I T I O N A L
SETTINGS
High Pressure Safeties
1st Stage 230 psig
2nd Stage 395 psig.
EPC Interlock (Factory Set)
Below 90 psig.
Liquid Injection
TEV Superheat (Factory Set)
25˚F.
1st Stage Discharge Thermostat
50˚ to 65˚F.
(Not adjustable.)
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 • Printed in USA
Revised August 1, 1996 P/N 340272A
8 - 1
CONTROL SETTINGS
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