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Wiring Instructions
1.
Remove the tamper resistant screw with the special key provided.
2.
If it is necessary to remove the sealed knockouts, carefully place a
screwdriver on the edge of the knockout and sharply apply a force
sufficient to dislodge the knockout plug. See Fig. 9.
3.
Run wires through an approved conduit connector and affix
the connector to the device. A NEMA-4 rated conduit fitting is
required for outdoor use.
4.
Connect the wires to the appropriate terminal connections for
the service intended. See Figures 2,4,5 and 6. See Fig. 7 for two
switch one conduit wiring.
Adjustment and Testing
NOTE:
Testing the PS40 may activate other system connected devices.
The operation of the pressure supervisory switch should be tested upon
completion of installation and periodically thereafter in accordance with
the applicable local, national and NFPA codes and standards and/or the
authority having jurisdiction (manufacturer recommends quarterly or
more frequently).
The use of a Potter BVL (see product bulletin 5400799 for details)
is recommended to facilitate setting and testing of the PS40 pressure
switch. When a BVL (bleeder valve) is used, the pressure to the switch
can be isolated and bled from the exhaust port on the BVL without
affecting the supervisory pressure of the entire system. See Fig. 3.
The operation point of the PS40 Pressure Switch can be adjusted to any
point between 10 and 60 psi (0,7 - 4,11 bar) by turning the adjustment
knob(s) clockwise to raise the actuation point and counter clockwise
to lower the actuation point. In the case of the PS40-2, both switches
operate independent of each other. Each switch may be independently
adjusted to actuate at any point across the switch adjustment range. If the
pressure needs to be adjusted from the factory settings, adjust the system
pressure to the desired trip point. Use an ohmmeter on the appropriate
contact (COM and 2 for pressure decrease and COM and 1 for pressure
increase). Adjust the knurled knob until the meter changes state. At that
point the switch is set for that particular pressure. Final adjustments
should be verified with a pressure gauge.
The position of the top of the adjustment knob across to the printed
scale on the switch bracket can be used to provide an approximate visual
reference of the pressure switch setting.
Dimensions
Fig 1
ADJUSTMENT
KNOB
1/2" NPT
2.48
[62.87]
3.78
[95.89]
NOTE: To prevent leakage, apply Teflon tape sealant to male threads only.
Potter Electric Signal Company, LLC
2.87
[72.97]
4.22
[107.19]
3.20
[81.28]
•
St. Louis, MO
5400931 - REV J
Switch Clamping Plate Terminal
Fig 2
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.
Typical Sprinkler Applications
Fig 3
AIR LINE
SHUT-OFF
VALVE
CHECK
VALVE
DWG. #924-1A
Closing of any shutoff valves between the alarm check valve
GROUND
and the PS10 will render the PS10 inoperative. To comply with
SCREWS
IBC, IFC, and NFPA-13, any such valve shall be electrically su-
pervised with a supervisory switch such as Potter Model RBVS.
1.60
[40.64]
DWG# 930-1
•
Phone: 866-956-0988 / Canada 888-882-1833
•
2/20
PS40 Series
Supervisory Pressure Switch
PS40 SUPERVISORY PRESSURE SWITCH
PS10
BLEEDER
ALARM
TEST
PRESSURE
VALVE
SWITCH
BVL
RBVS
CHECK
VALVE
DRY PIPE
VALVE
WATER
BY-PASS
OS & Y
TEST
VALVE
VALVE
CAUTION
•
www.pottersignal.com
WATER
MOTOR
GONG
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