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 TM 55-1905-219-14-8
4-33. GAGE BOARD - AIR CONDITIONING - MAINTENANCE INSTRUCTIONS (Continued).
LOCATION
ITEM
ACTION
REMARKS
ADJUSTMENTS (Cont)
8. Water
a. Turn differential adjusting screw counterclockwise
pressure
to minimum limit.
control
switch
b. Turn range screw clockwise to high limit.
c. Throttle water valve until condenser water supply
pressure is 15 psig (103.4 kPa). Turn range screw
slowly counterclockwise until contacts just close.
This fixes the cut-in point.
d. Slowly throttle condenser water supply decreasing
pressure. Switch contacts should open at 5 psig
(34.5 kPa). If switch contacts open above 5 psig
(34.5 kPa), turn differential screw clockwise to
widen differential slightly.
e. Control condenser water supply and check switch
settings.
f. Recommended settings:
Close - 15 psig (103.4 kPa)
Open - 5 psig (34.5kPa)
4-942
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