Potter Releasing Systems - Manual (Page 77)

77
MFG. #5400928 - REV D
1/08
PRINTED IN USA PAGE 1 OF 3
PS10 SERIES
PRESSURE SWITCH
Patent Pending
Installation
The Potter PS10 Series Pressure Actuated Switches are designed for the
detection of a waterflow condition in automatic fire sprinkler systems of
particular designs such as wet pipe systems with alarm check valves, dry
pipe, preaction, or deluge valves. The PS10 is also suitable to provide a
low pressure supervisory signal; adjustable between 4 and 15 psi (0,27 and
1,03 BAR).
1. Apply Teflon tape to the threaded male connection on the device.
(Do not use pipe dope)
2. Device should be mounted in the upright position (threaded connection down).
3. Tighten the device using a wrench on the flats 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 sufficient to dislodge the knockout plug. See Fig 9
3. Run wires through an approved conduit connector and affix the connector
to the device.
4. Connect the wires to the appropriate terminal connections for the
service intended. See Figures 2,4,5, and 6. See Fig 7 for two switch, one
conduit wiring.
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 finish, 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 Specifications:
NEMA 4/IP55 Rated Enclosure - indoor or outdoor when used
with NEMA 4 conduit fittings.
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, LLC • St. Louis, MO • Phone: 866-956-0988/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.
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.
Ordering Information
Model Description Stock No.
PS10-1 Pressure switch with one set 1340103
SPDT contacts
PS10-2 Pressure switch with two sets 1340104
SPDT contacts
Hex Key 5250062
Cover Tamper Switch Kit 0090200