Pilot Valve Adjustments - Quincy QR-25 Series Instruction Manual

PILOT vALvE ADJUSTMENTS

All adjustments made to the pilot valve must be performed by a qualified technician. The adjustments must
be made while the unit is operating, therefore, extreme caution must be taken while working on the unit.
Observe all necessary precautions. Always use a back­up wrench and make all differential and unload pres-
sure adjustments in very small increments (1/8 turn).
The pressure switch and / or pilot valve are set at the factory for maximum efficiency. Adjustments to either com-
ponent must be performed by a qualified technician. Exceeding the factory recommended maximum pressure
will void the warranty and may cause personal injury.
Setting Unload Pressure
Step 1. Flip the toggle to
the "RUN" position
as shown, or turn
the knurled knob (if
so equipped) coun-
terclockwise until it
stops.
Step 2. Loosenlocknut(coun-
terclockwise). * Sta-
bilize with back-
up wrench!
Setting Differential Pressure
Step 5. Loosen locknut (counterclock-
wise).* Stabilize with back-up
wrench!
QR-25 Series
52201-107, January 2014
WARNING !
Step 3. Turn clockwise to increase unload pres-
*
Step 4. Tighten locknut (clockwise) with wrench.
*
28
"MANUAL
UNLOAD"
sure, turn counterclockwise to decrease
unload pressure. Hold position with
wrench and proceed to Step 4.
* Stabilize with back-up wrench!
Step 6. Turn clockwise to increase
the differential pressure and
counterclockwise to decrease
the differential pressure. Hold
position with wrench and pro-
ceed to Step 7.
Step 7. Tighten locknut (clockwise)
with wrench. * Stabilize with
back-up wrench!
3501 Wismann Lane, Quincy IL - 62305-3116
position
(Ref.)
Quincy Compressor