MFG. #5400932 - REV D-1
12/10
PRINTED IN USA
PAGE 3 OF 3
PS100-2
PRESSURE TYPE FLOW SWITCH
Fig. 8
DWG#928-5
Fig. 9
Removing Knockouts
Changing Pressure
(with normal system pressure)
C
C
1
2
SWITCH ONE
SWITCH TWO
C
C
1
2
DWG# 932-3
Engineer/Architect Specifications Pressure Type
Waterflow Switch
Pressure type waterflow switches; shall be a Model PS100-2 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 ½" NPT male pressure connection
to be connected to the excess pressure supply line on the system
side of any shut-off or check 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 PS100-2 to facilitate
testing of the PS100-2.
Pressure type waterflow switches shall have a maximum service
pressure rating of 300 PSI (20,68 BAR) and shall be factory adjusted
•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.
to operate on a pressure decrease of 10 PSI (14,5 BAR).
Pressure switch shall have two Form C contacts, switch contact rating
at 10.1 Amps at 125/250 VAC. 2.0 Amps at 30 VDC.
Pressure type waterflow 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 type waterflow switch shall be zinc die-cast
with rain lip and shall attach with one tamper resistant screw. The
pressure type waterflow switch shall be suitable for indoor or outdoor
service with a NEMA-4/IP66 rating.
The pressure type waterflow switch shall be UL, ULC, and CSFM
listed, FM and LPC approved and NYMEA accepted.
#1: Closed under normal system pressure.
#2: Open under normal system pressure, closes on pressure
drop. Use as waterflow detector.
