MFG. #5401143 - REV G
10/07
PRINTED IN USA
PAGE 2 OF 2
PCS
PUMP CONTROL SWITCH
Wiring
Use properly rated temperature supply wire for the anticipated service
temperature. When applicable, make all electrical connections in
accordance with the National Electrical Code and all local regulations
in a junction box with a 2 inch maximum connector length between the
PCS enclosure and junction wiring box.
Note: Do not alter factory
wiring on micro switch.
Note:
Do not loosen or remove the two (2) screws that secure the switch to the
switch mounting bracket.
The PCS requires 120V AC power to operate.
It is not possible to test the switch with an ohm meter or continuity tester.
When 120V AC is applied to the black and white wires, the 120V AC
line voltage will be switched internally to the red wire when the pressure
reaches the PCS low pressure setting. With 120V AC applied to the
black, a wiring check may be performed by manually actuating the switch
actuator on the side of the snap-action switch inside the enclosure. (See
Fig. 3), and metering for 120V AC between the red and white wires.
Fig. 3
Adjustments
The two thumb adjustment dials, accessible through the enclosure cover, are
used to adjust the set point and reset point of the switch. The dial scales and
pointer may be used to give an indication of the low and high set points.
The high setting adjustment dial is calibrated for increasing pressure. The
low setting adjustment dial is calibrated for decreasing pressure. For best
accuracy, make the fi nal adjustments with a pressure gauge at the actual
working media pressure and temperature encountered in the application.
The minimum deadband (minimum span between set and reset points)
may be obtained at any point in the operating range of the switch.
When the desired settings are obtained, replace the adjustment cover. The
adjustment cover and enclosure cover can be made tamper resistant by a
single sealing wire inserted through the hole in the locking bar.
The repeatability of the set and reset points is typically ±1% of the
operating range.
Fig. 2
