MFG. #5401161 - REV d
09/12
PRINTEd IN USA
PAGE 4 OF 8
MODEL PS40 (VdS)
SUPERVISORY PRESSURE SWITCH
Pressure type supervisory switches; shall be a Model PS40 as
manufactured by Potter Electric Signal Company, St. Louis, MO.,
and shall be installed on the fire sprinkler system as shown and or
specified herein.
Switches shall be provided with a 1/2" NPT male pressure
connection to be connected into the air supply line on the system
side of any shut-off valve. A Model BVL bleeder valve as supplied
by Potter Electric Signal Company of St. Louis, MO., or equivalent
shall be connected in line with the PS40 to provide a means of
testing the operation of the supervisory switch. (See Fig. 3)
The switch unit shall contain SPdT (Form C) switch(es). One
switch shall be set to operate at a pressure decrease of 0,7 BAR (10
PSI) from normal. If two switches are provided, the second switch
shall be set to operate at a pressure increase of 0,7 BAR (10 PSI)
from normal.
Ordering Information
Model
Description
Stock No.
PS40-1
Pressure switch with one set SPdT contacts
1320031
PS40-2
Pressure switch with two sets SPdT contacts
1320041
Hex Key
5250062
Cover Tamper Switch Kit
0090200
BVL
Bleeder valve
1000018
Engineer/architect Specifications Pressure Type Waterflow Switch
• Installation must be performed by qualified personnel and in accordance with all
national and local codes and ordinances.
• Shock hazard. Disconnect power source before servicing. Serious injury or death
could result.
• Read all instructions carefully and understand them before starting installation. Save
instructions for future use. Failure to read and understand instructions could result
in improper operation of device resulting in serious injury or death.
• Risk of explosion. Not for use is hazardous locations. Serious injury or death could result.
• Do not tighten by grasping the switch enclosure. Use wrenching flats on the
bushing only. Failure to install properly could damage the switch and cause
improper operation resulting in damage to equipment and property.
• To seal threads, apply Teflon tape to male threads only. Using joint compounds or
cement can obstruct the pressure port inlet and result in improper device operation
and damage to equipment.
• Do not over tighten the device, standard piping practices apply.
• Do not apply any lubricant to any component of the pressure switch.
Switch contacts shall be rated at 10.1 Amps at 125/250VAC and 2.0
Amps at 30VDC. The units shall have a maximum pressure rating
of 17,2 BAR (250 PSI) and shall be adjustable from 0,7 to 4,1 BAR
(10 to 60 PSI).
Pressure switches shall have two conduit entrances, one for each
individual switch compartment to facilitate the use of dissimilar
voltages for each individual switch.
The cover of the pressure switch shall be zinc die-cast with rain
lip and shall attach with one tamper resistant screw. The pressure
switch shall be suitable for indoor or outdoor service with a NEMA-
4/IP66 rating.
The pressure switch shall be UL, ULC, and CSFM listed, FM and
LPC approved and NYMEA accepted.
