PAGE 1 OF 2PRINTED IN USA MKT. #8800001 - REV W
MFG. #5400761 - 7/02
VSR-F
VANE TYPE WATERFLOW
ALARM SWITCH WITH RETARD
UL,ULCandCSFMListed,FMandLPCBApproved,NYMEA
Accepted, CE Marked
Service Pressure: Up to 450 PSI (31 BAR)
Minimum Flow Rate for Alarm: 10 GPM (38 LPM)
Maximum Surge: 18 FPS (5,5 m/s)
ContactRatings: 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 Specifications:
• Suitable for indoor or outdoor use with factory installed
gasket and die-cast housing.
• NEMA 4/IP54 Rated Enclosure - use with appropriate
conduit fitting.
• Temperature Range: 40°F/120°F, 4,5°C/49°C
• Non-corrosive sleeve factory installed in saddle.
Caution: This device is not intended for applications in explosive
environments.
Sizes Available: Steel Pipe schedules 10 thru 40, sizes 2" thru 8"
BS 1387 pipe 50mm thru 200mm
Note: For copper or plastic pipe use Model VSR-CF.
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
Optional: Cover Tamper Switch Kit, Stock No. 0090018
U.S. Pat. No. 3921989
Canadian Pat. No. 1009680
Other Patents Pending
Potter Electric, Rd., 1990
GENERAL INFORMATION
The Model VSR-F is a vane type waterflow switch for use on
wet sprinkler systems. It is UL Listed and FM Approved for
use on steel pipe; schedules 10 through 40, sizes 2" thru 8"
(50mm thru 200mm).
LPC approved sizes are 2" thru 8" (50mm thru 200mm).
The unit may also be used as a sectional waterflow detector
on large systems.
The unit contains two single pole, double throw, snap action
switches and an adjustable, instantly recycling pneumatic re-
tard. The switches are actuated when a flow of 10 gallons per
minute (38 LPM) or more occurs downstream of the device.
The flow condition must exist for a period of time necessary to
overcome the selected retard period.
ENCLOSURE: The unit is enclosed in a general purpose, die-
cast housing. The cover is held in place with two tamper resis-
tant screws which require a special key for removal. A field in-
stallable cover tamper switch is available as an option which
may be used to indicate unauthorized removal of the cover. See
bulletin no. 5400775 for installation instructions of this switch.
INSTALLATION: See Fig.2
These devices may be mounted on horizontal or vertical pipe.
On horizontal pipe they should be installed on the top side of the
pipe where they will be accessible. The units should not be in-
stalled within 6" (15cm) of a fitting which changes the direction of
the waterflow or within 24" (60 cm) of a valve or drain.
Drain the system and drill a hole in the pipe using a circular saw
in a slow speed drill. The 2" (50mm) and 2 1/2" (65mm) devices
require a hole with a diameter of 1 1/4" + 1/8" - 1/16" (33mm
±2mm). All other sizes require a hole with a diameter of 2" ±1/8"
(50mm ±2mm).
Clean the inside pipe of all growth or other material for a dis-
tance equal to the pipe diameter on either side of the hole.
Roll the vane so that it may be inserted into the hole; do not bend
or crease it. Insert the vane so that the arrow on the saddle
points in the direction of the waterflow. Install the saddle strap
and tighten nuts alternately to an eventual 50 ft-lbs. (68 n-m) of
torque (see Fig. 2). The vane must not rub the inside of the pipe
or bind in any way.
Specifications subject to change without notice.
Potter Electric Signal Company • 2081 Craig Road, St. Louis, MO, 63146-4161 •Phone: 800-325-3936/Canada 888-882-1833 •www.pottersignal.com
