Quincy Compressor QR-25 210, Instruction Manual

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QR-25 Series Quincy Compressor
52201-107, December 2012 29 3501 Wismann Lane, Quincy IL - 62305-3116
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).
WARNING !
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. Loosen locknut (coun­
terclockwise). * Sta-
bilize with back-
up wrench!
Step 3. Turn clockwise to increase unload pres­
sure, turn counterclockwise to decrease
unload pressure. Hold position with
wrench and proceed to Step 4.
Step 4. Tighten locknut (clockwise) with wrench.
* Stabilize with back-up wrench!
Setting Differential Pressure
Step 5. Loosen locknut (counterclock­
wise). * Stabilize with back-up
wrench!
Step 6. Turn clockwise to decrease
the differential pressure and
counterclockwise to increase
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!
“MANUAL
UNLOAD”
position
(Ref.)