Pressure Switch Adjustment; Reversal Of Compressor Rotation - Quincy QR-25 Series Instruction Manual

Fig. 5-2 Belt Tension Gauge
WARNING !
WARNING !
WARNING !

Reversal of Compressor Rotation

PRESSURE
ADJUSTMENT
SCREW
Fig. 5-3 Pressure Switch
*Full load amps (FLA) & Service Factor can be found on the motor nameplate.
QR-25 Series
52201-107, January 2014

Pressure Switch Adjustment

Pressure switches provided by Quincy Compressor are pre­set at
the factory and usually do not require adjustment. However, the
following procedures can be performed by a qualified electrician
to adjust the pressure switch.
Step 1)
Step 2)
loaded adjustment screw in (clockwise) to increase the amount of
air pressure required to open the switch and stop the unit. Screw
the spring loaded adjustment screw out (counterclockwise) to
decrease the amount of air pressure required to open the switch
and stop the unit.
Pix 1153
Electric power always exists inside the pressure switch whenever
the compressor package is connected to a power supply. Be careful
not to touch any electrical leads when setting the pres sure switch.
Never exceed the designed pressure for the system or overload the
motor beyond its Maximum Amp Draw.
* Full Load Amps x Service Factor = Maximum Amp Draw
Never assume a compressor is safe to work on just because it is not
operating. It may be in the automatic stand-by mode and may re-
start any time. Follow all safety precautions outlined in SECTION
5, Stopping For Maintenance.
Pressure lubricated QR­25 series compressors can be modified to operate in
reverse rotation with exception to the Model 210. This model operates in the
counterclockwise direction only.
ELECTRICAL
CONTACTS
Pix 1067
26
Remove the pressure switch cover.
While the compressor is running, screw the spring
To reverse the operating direction of a pressure
lubricated compressor, perform the following steps:
Step 1) Remove the control tubing from the
hydraulic unloader and pilot valve (if so equipped)...
the oil pressure gauge and hydraulic unloader...
the pilot mounting stud set screw and pilot
valve assembly...
the oil filter (turn counterclockwise)...
*
and six (6) oil pump housing bolts.
3501 Wismann Lane, Quincy IL - 62305-3116
Quincy Compressor