MECHANICAL SUBCOOLING
By lowering the temperature of the liquid
supplied to the T E V, the efficiency of the
evaporator is increased. The lower tempera-
ture liquid refrigerant produces less flash gas
exiting the TEV.
Shell and Tube Subcooler
E l e c t r i c a l l y, a thermostat responding to main
liquid line temperature of the rack receiving
subcooling controls a solenoid valve on the
liquid supply line from the unit supplying
subcooling.
A standard liquid line solenoid valve and a
TEV control refrigerant on the rack. An EPR
on the unit supplying the subcooling prevents
the subcooler temperature from dropping
below desired liquid temperature.
Shell and Tube Subcooler Controls
Thermostat setting is 50˚F with minimum
differential, or customer specifications.
The T E V should be set with the highest
possible superheat that will still maintain the
desired liquid temperature.
EPR setting is listed on the store legend.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 • Printed in USA
Revised August 1, 1996 P/N 340272A
7 - 15
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