MODEL PS10-EXF
EXPLOSION PROOF
PRESSURE SWITCH
PRINTED IN USA
MKT. #5401029 - REV K
7/07
PAGE 1 OF 3
Installation And Test Procedure
The Potter PS10-EXF Pressure Actuated Switch is designed for the
detection of a waterfl ow condition in automatic fi re sprinkler systems
located in hazardous locations classifi ed as shown above, of particular
designs such as wet systems with alarm check valves or dry pipe systems.
It may also be used to provide a low pressure supervisory signal. It can
be adjusted to operate on pressure between 28 kPA/.28 BAR (4 PSI) and
138 kPA/1.38 BAR (20 PSI).
Mounting:
Device should be mounted in upright position (threaded
connection down).
Testing:
The operation of the pressure alarm switch and its associated
protective system should be tested upon completion of installation
and periodically thereafter in accordance with the applicable codes
and standards and/or the authority having jurisdiction (manufacturer
recommends quarterly or more frequently)
.
Wet System
METHOD 1: When using PS10-EXF and control unit with retard,
connect the PS10-EXF into alarm port piping on the input side of retard
chamber and electrically connect PS10–EXF to control unit that provides
a retard to compensate for surges. Insure that no shut off valves are
present between the alarm check valve and the PS10-EXF.
METHOD 2:
When using the PS10-EXF for local bell application or
with a control that does not provide a retard feature, the PS10-EXF
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.
Wet System With Excess Pressure:
Connect the PS10-EXF into
alarm port piping extending from alarm check valve. Retard provisions
are not required. Insure that no shut off valves are present between the
alarm check valve and the PS10-EXF.
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 the PS10-EXF into the piping that extends
from the intermediate chamber of the dry sprinkler valve. Install on the
outlet side of the in-line check valve of the alarm port piping. Insure
that no shut off valves are present between the dry sprinkler valve and
the PS10-EXF.
Testing:
Accomplished by opening the water by-pass test valve
.
CENELEC, DEMKO NO. D 03 Atex 0311298, EN50018,
EN50014, FM Approved
Dimensions:
152mm Dia. x 178mm H
Enclosure:
Cast aluminum
Pressure Connection:
1/2" NPT male brass fi tting
Conduit Entrance:
1/2" NPT female conduit opening
Factory Adjustment:
Both switches operate on pressure increase at:
41 ±7 kPA/.41 ±.07 BAR (6 ±1 PSI)
Both switches operate on pressure decrease at:
34 ±7 kPA/.34 ±.07 BAR (5 ±1 PSI)
Maximum Differential:
7 kPA/.07 BAR (1 PSI)
Maximum Proof Pressure:
1724 kPA/17.24 BAR (250 PSI)
Switch Contacts:
Two Sets of SPDT (Form C)
15.0 Amps at 125/250 VAC
2.0 Amps at 30 VDC
Environmental Specifi cations:
For use in hazardous locations classifi ed asEEx d IIB T6 (IP66)
NEMA 4 and 9 Rated Enclosure
Temperature Range:
-40°F to 140°F (-40°C to 60°C)
PS10-EXF Stock Number 1350001
Potter Electric Signal Company
•
2081 Craig Road, St. Louis, MO, 63146-4161
•
Phone: 800-325-3936/Canada 888-882-1833
•
Model Description
Stock No.
PS10-EXF Pressure switch with 2 sets of
1350001
contacts (SPDT)
Hex Key (For cover removal)
5250074
Hex Key (For pressure adjustment access) 5250073
The above tests may also activate any other circuit closer or water
motor gongs that are present on the system.
