MFG. #5400930 - REV D
1/08
PRINTED IN USA
PAGE 2 OF 3
MODEL PS40
PRESSURE SWITCH
Typical Sprinkler Applications
Switch Clamping Plate Terminal
Dimensions
OUTGOING
INCOMI
NG
DWG# 923-3
Fig. 1
Fig. 2
Fig. 3
GONG
MOTOR
WATER
TEST
BY-PASS
WATER
VALVE
OS & Y
VALVE
ALARM
PRESSURE
SWITCH
PS10
CHECK
VALVE
VALVE
CHECK
BVL
VALVE
TEST
BLEEDER
AIR LINE
SHUT-OFF
VALVE
PS40
DWG. #924-1A
RBVS
DRY PIPE
VALVE
Typical Connections
COM
1
2
EOLR
TO FIRE
ALARM
PANEL
TO FIRE
ALARM
PANEL
EOLR
COM
1
2
2
1
COM
HIGH
AIR
LOW
AIR
PS40-1
PS40-2
WITH NORMAL SYSTEM PRESSURE
APPLIED LOW -TERMINAL 2
CLOSES ON PRESSURE DROP.
WITH NORMAL SYSTEM
PRESSURE APPLIED HIGH
- TERMINAL 1 WILL CLOSE
ON PRESSURE INCREASE.
GROUND
SCREWS
1/2" NPT
NOTE: To prevent leakage, apply teflon tape sealant to male threads only.
ADJUSTMENT
KNOB
2.87
[72.97]
4.22
[107.19]
2.48
[62.87]
3.78
[95.89]
3.20
[81.28]
1.60
[40.64]
Fig. 4
An uninsulated section of a single conductor
should not be looped around the terminal and
serve as two separate connections. The wire
must be severed, thereby providing supervision
of the connection in the event that the wire
becomes dislodged from under the terminal.
Closing of any shutoff valves between the
alarm check valve and the PS10 will render
the PS10 inoperative. To comply with NFPA-
72 any such valve shall be electrically
supervised with a supervisory switch such as
Potter Model RBVS.
