MFG. #5400932 - REV D
1/08
PRINTED IN USA
PAGE 1 OF 3
PS100-2
PRESSURE TYPE FLOW SWITCH
Installation
The Potter PS100 Pressure Actuated Switches are designed primarily to detect
a decrease from normal system pressure in automatic fi re sprinkler systems.
A typical application is for an alarm initiating device that is used on a wet
system with excess pressure. The PS100-2 has two SPDT switches factory
set to operate on a pressure drop at 90 PSI (6,2 BAR). See section heading
Adjustments and Testing
if other than factory set point is required.
1. Connect the PS100 to the system side of any shutoff or check valve.
2. Apply Tefl on tape to the threaded male connection on the device.
(Do not use pipe dope)
3. Device should be mounted in the upright position.
(Threaded connection down)
4. Tighten the device using a wrench on the fl ats on the device.
Wiring Instructions
1. Remove the tamper resistant screw with the special key provided.
2. Carefully place a screwdriver on the edge of the knockout and sharply
apply a force suffi cient to dislodge the knockout plug. See Fig. 9
3. Run wires through an approved conduit connector and affi x the
connector to the device. A NEMA-4 rated conduit fi tting
is required for outdoor use.
4. Connect the wires to the appropriate terminal connections for the
service intended. See Figures 2,4,5,7, and 8. See Fig. 6 for two
switch one conduit wiring.
(UL, cUL, and CSFM Listed, FM and LPC Approved, NYMEA
Accepted, CE Marked Pending)
Dimensions:
3.78" (9.6cm)W x 3.20" (8.1cm)D x 4.22" (10.7cm)H
Conduit Entrance:
Two knockouts provided for 1/2" conduit.
Individual switch compartments and ground screw
suitable
for
dissimilar
voltages.
Enclosure:
Cover- Die-cast with textured red powdercoat fi nish, single
cover screw and rain lip.
Base- Die-cast
Pressure Connection:
Nylon 1/2" NPT male
Factory Adjustment:
Operates on decrease at 90 PSI (6,2 BAR)
Pressure Range:
25-175 PSI (1,7 - 12,1 BAR)
Differential:
Typical 2 lbs. at 25 PSI (,14 at 1,7 BAR)
8 lbs at 175 PSI (,55 at 12,1 BAR)
Maximum System Pressure:
300 PSI (20,68 BAR)
Switch Contacts:
Two SPDT (Form C)
10.1 Amps at 125/250VAC, 2.0 Amps at 30VDC
Environmental Specifi cations:
NEMA 4/IP55 Rated Enclosure - indoor or outdoor when
used with NEMA-4 conduit fi ttings.
Temperature range: -40°F to 140°F (-40°C to 60°C)
Tamper:
Cover incorporates tamper resistant fastener that requires
a special key for removal. One key is supplied with each device.
For optional cover tamper switch kit, order Stock No. 0090200.
See bulletin #5401200 PSCTSK.
Service Use:
Automatic
Sprinkler
NFPA-13
One or two family dwelling
NFPA-13D
Residential Occupancy up to four stories
NFPA-13R
National Fire Alarm Code
NFPA-72
Potter Electric Signal Company • 2081 Craig Road, St. Louis, MO, 63146-4161 • Phone: 800-325-3936/Canada 888-882-1833
• www.pottersignal.com
Adjustment And Testing
The operation of the waterfl ow pressure switch should be tested upon
completion of installation and periodically thereafter in accordance with
the applicable NFPA codes and standards and/or the authority having
jurisdiction (manufacturer recommends quarterly or more frequently).
Note:
Testing the PS100 may activate other system connected devices.
The use of a Potter BVL (see product bulletin 8900067 for details) is
recommended to facilitate setting and testing of the PS100 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
effecting the supervisory pressure of the entire system. See Fig. 3
The operation point of the PS100 Pressure Switch can be adjusted to any
point between 25 and 175 PSI (1,7 - 12,1 BAR) by turning the adjustment
knob(s) clockwise to raise the actuation point and counter clockwise to
lower the actuation point. Both switches operate independent of each
other. Each switch may be independently adjusted to actuate at any point
acrosss the switch adjustment range. Initial adjustment can be made
with a visual reference from the top of the adjustment knob across to the
printed scale on the switch bracket. Final adjustments should be verifi ed
with a pressure gauge.
Ordering
Information
Model
Description Stock
No.
PS100-2
Pressure switch with two SPDT contacts 1341005
Hex Key 5250062
Cover Tamper Switch Kit 0090200
BVL
Bleeder valve 1000018
