10
Section 8 - Adjusting the Pressure Switch
STEP 1:
Adjust the cut-in and cut-out pressure by turning the
Main Calibration Screw
; clockwise to increase
pressure, counter-clockwise to decrease pressure.
STEP 2:
Adjust the
Differential Pressure Screw
to change the cut-out pressure without affecting the cut-in
pressure*. Clockwise increases pressure, counter-clockwise decreases pressure.
QRM2- Models with Tank
(RASCO Part Number 6990021905)
Factory Set at 50 PSIG Cut-IN / 70 PSIG Cut-OUT
QRM2- Models without Tank
(RASCO Part Number 6990021904)
Factory Set at 20 PSIG Cut-IN / 26 PSIG Cut-OUT
*Differential Pressure is defined as the difference between cut-out and cut-in pressure. Turning the
differential pressure screw clockwise increases the differential pressure, which increases the cut-out
pressure without changing the cut-in pressure.
QRM2- Replacement Parts
Pressure Switch
Without Tank
Reliable P/N 6990021904
With Tank
Reliable P/N 6990021905
Check Valve
All Models
Reliable P/N 6990021906
