Pressure Switch - Bostitch CWC100 Quick Start Manual

CWC100
PRESSURE SWITCH:
This compressor is equipped with an automatic Pressure Switch which controls the electric
motor according to the pressure in the tank. The Pressure Switch is set to an operating
range of 105 PSI to 135 PSI. It is factory set to the following specifications:
Restart (Cut-in) @ 105 PSI, Off (Cut-off) @ 135 PSI
Note: Under no circumstances should a pressure switch be adjusted to pressures within
5 PSI of the safety valve setting of 150 PSI. There should be at least a 10 PSI
differential between the Safety Valve setting and the maximum Pressure Switch
setting on the tank.
Do not exceed the 135 PSI maximum pressure.
There are two types of pressure switches used on the CWC100. You must know which
type you have in order to make the adjustment.
a. ) Condor
b. ) Telemecanique
Part Number 7250220000 (older style)
Part Number 7250320000 (current style)
To adjust, disconnect power, then remove the switch cover. Use a 7mm insulated nut
driver for the Condor or #2 Phillips screw driver for the Telemecanique. The Condor
has two nuts and Telemecanique has a single screw noted as "A" which set the cut-in
pressure. Set these so that the motor starts at no more than 105 PSI. On the Condor,
turn the adjusting nuts evenly, giving each nut 1/2 turn at a time.
The second adjustment, the single nut noted as "B" sets the difference between cut-in
and cut-off pressure. This should not normally need adjustment. After setting the correct
cut-in pressure, the cut-off should remain about 30 PSI higher than the cut-in. Adjust if
required, do not go above 135 PSI.
Note: To repeat, cut-in pressure ( Adjustment "A") plus differential (Adjustment "B")
equal cut-off pressure.
When reassembling Pressure Switch cover, make sure that the cover is seated squarely on
the base of the switch, with the rim on the cover engaged with the outside of the base. If
the cover is loose or crooked, the ort/off switch will not work correctly.
Repair parts are not available for the Pressure Switch, the unit must be replaced if any
part of it becomes damaged.
REV A
5