WFSR-F
WATERFLOW ALARM SWITCH
WITH RETARD
MKT. #8810009 - REV T
MFG. #5400987 - 10/07
PAGE 1 OF 2
PRINTED IN USA
Waterfl ow Alarm Switch With Retard For Supervision Of Wet
Alarm Check Valve
The Model WFSR-F is a pressure operated switch with an adjustable,
instantly recycling pneumatic retard to prevent false alarms due to water
pressure variation. The WFSR-F is connected into the alarm port of a wet
sprinkler system alarm check valve (see " WARNING", page 2).
Installation
A male 1/2" NPT pipe fi tting is provided for connection to the alarm
port of the alarm check valve. No additional mounting or support is
UL, cUL and CSFM Listed, FM Approved and NYMEA
Accepted, CE Marked, VdS Approved
Dimensions:
5 9/16"H x 3 1/2"W x 5 7/8"D
(14,1cm H x 8,9cm W x 14,9cm D)
Weight:
1.5 lbs. (3,3 kg.)
Enclosure:
Cover - Die-cast with textured red powdercoat fi nish
Base - Die-cast aluminum
Pressure Connection:
1/2" Male NPT
Pressure Adjustments:
Factory adjusted to operate between
5 and 8 PSI (0.35 and 0,55 BAR) on
rising pressure
Maximum system pressure:
175 PSI (12,1 BAR)
Contact Ratings:
Two Sets of SPDT (Form C)
15.0
Amps
at
125/250VAC
2.0 Amps at 30VDC Resistive
Conduit
Entrances:
Two knockouts provided for 1/2" conduit
Environmental Specifi cations:
40°F to 120°F (4,5°C to 49°C)
NEMA 4 Enclosure - when used
with proper conduit fi ttings
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
Tamper:
Cover incorporates tamper resistant fasteners that require a
special key for removal. One key is supplied with each device. For
optional cover tamper switch kit, order Stock No. 0090018.
Potter Electric Signal Company • 2081 Craig Road, St. Louis, MO, 63146-4161 • Phone: 800-325-3936/Canada 888-882-1833
• www.pottersignal.com
Fig. 2 Typical Electrical Connections
Note:
For supervised circuits see “Switch Terminal Connections”
drawing and caution note (Fig. 4).
2 SETS OF NORMALLY
OPEN CONTACTS
CLOSE ON ALARM
THE N.C. AND N.O. MARKINGS ON
THE SWITCH ARE FOR AN ALARM
CONDITION.
THE CONTACTS ARE REVERSED
WHEN THE DEVICE IS IN THE
NORMAL CONDITION.
WATERFLOW ZONE
ON FIRE PANEL
EOLR FROM
FIRE PANEL
POSITIVE DC
OR HOT AC
NEGATIVE DC OR
NEUTRAL AC
DWG# 761-2
BELL
COM
NO
NC
COM
NO
NC
COM
NO
NC
COM
NO
NC
EOLR
Stock number - 1010080
This device is not intended for applications
in explosive environments.
Fig. 1 WFSR-F
TO SPRINKLERS
FROM WATER
SUPPLY
BY-PASS
TEST VALVE
RBVS
WFSR-F
TO
DRAIN
RETARD
CHAMBER
DWG# 987-1A
required. Allow 5" (12,7cm) to the front of the unit for removal of the
cover. Install with the pressure connection down.
Testing
Operation of the unit is checked by opening the by-pass test valve or
inspector's test valve. The frequency of the inspection and testing for the
Model WFSR-F and its associated protective monitoring system should
be in accordance with applicable NFPA Codes and Standards and/or
authority having jurisdiction (manufacturer recommends quarterly or
more frequently).
