TEV
The Thermal Expansion Valve regulates
refrigerant flow into the evaporator by
responding to the temperature of superheated
vapor at the outlet of the evaporator.
Before attempting to set a T E V be sure the
merchandiser is within 10˚F of its normal
operating range. Attach temperature probes at
both the T E V bulb location (under the
clamps), and between the T E V and the
evaporator Inlet.
While the valve is hunting, the temperature
difference between the two probes should not
exceed 3-5˚F. The differential may fall to
zero. To reduce differential, turn the adjusting
stem counter clockwise and wait at least
15 minutes before checking results.
Valve Recommended
Body Adjustment
G
1
⁄2 turn
BF
1
⁄4 turn
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 • Printed in USA
Revised August 1, 1996 P/N 340272A
7 - 7
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