TEV
The Thermal Expansion Valve regulates refriger-
ant flow into the evaporator by responding to the
temperature of superheated vapor at the outlet of
the evaporator.
Before attempting to set a TEV be sure the mer-
chandiser is within 10ÞF of its normal operating
range. Attach temperature probes at both the TEV
bulb location (under the clamps), and between the
TEV and the evaporator Inlet.
While the valve is hunting, the temperature differ-
ence between the two probes should not exceed
3-5ÞF. The differential may fall to zero. To reduce
differential, turn the adjusting stem counter clock-
wise and wait at least 15 minutes before checking
results.
Valve
Recommended
Body
Adjustment
G
1
¼
2
turn
BF
1
¼
4
turn
September 1, 1997
P/N 401789
6 - 7
HUSSM ANN CORPORATION • BRIDGETON, M O 63044-2483 • Printed in USA
Figure 6-8 — Probe Locations for Setting
TEV
Figure 6-9 — TEV
Evaporator
TEV
Probes
Inlet
Outlet
Equalizer
Port
Bulb
Diaphragm
Adjustment
Stem
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