F. . Pressure Switches MODEL PS10

Testing
The operation of the pressure alarm 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).
Wet System
Method 1: When using PS10 and control unit with retard – connect PS10
(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 screws 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: 4 – 8 PSI (0,27 – 0,55 BAR)
Differential: 2 PSI (0,13 BAR) typical
Maximum System Pressure: 300 PSI (20,68 BAR)
Switch Contacts: SPDT (Form C)
10.1 Amps at 125/250VAC, 2.0 Amps at 30VDC
One SPDT in PS10-1, Two SPDT in PS10-2
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)
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
into alarm port piping on the input side of retard chamber and electrically
connect PS10 to control unit that provides a retard to compensate for surges.
Insure that no unsupervised shut-off valves are present between the alarm
check valve and PS10.
Method 2: When using the PS10 for local bell application or with a control
that does not provide a retard feature – the PS10 must be installed on the alarm
outlet side of the retard chamber of the sprinkler system.
Testing: Accomplished by opening the inspector’s end-of-line test valve.
Allow time to compensate for system or control retard.
Note: Method 2 is not applicable for remote station service use, if there is an
unsupervised shut-off valve between the alarm check valve and the PS10.
Wet System With Excess Pressure
Connect PS10 into alarm port piping extending from alarm check valve.
Retard provisions are not required. Insure that no unsupervised shut-off
valves are present between the alarm check valve and the PS10.
Testing: Accomplished by opening the water by-pass test valve or the
inspector’s end-of-line test valve. When using end-of-line test, allow time
for excess pressure to bleed off.
Dry System
Connect PS10 into alarm port piping that extends from the intermediate
chamber of the alarm check valve. Install on the outlet side of the in-line
check valve of the alarm port piping. Insure that no unsupervised shut-off
valves are present between the alarm check valve and the PS10.
Testing: Accomplished by opening the water by-pass test valve.
Note: The above tests may also activate any other circuit closer or water
motor gongs that are present on the system