Viking VSR-F Technical Data

June 15, 2007
The Viking Corporation, 210 N Industrial Park Road, Hastings MI 49058
Telephone: 269-945-9501 Technical Services 877-384-5464 Fax: 269-945-4495 Email: techsvcs@vikingcorp.com
1. DESCRIPTION
The Waterfl ow Indicator is a vane-type waterfl ow switch designed to detect a sustained fl ow of water exceeding 10 gpm. It is intended
for use on wet-pipe sprinkler systems only. The Model VSR-F has a built-in adjustable pneumatic retard device delays actuation of the
electrical switches to reduce the possibility of false alarms caused by one or more transient fl ow surges. The Model VS-SP does not
have a retard to prevent false alarm, therefore, it should NOT be used on systems with variable water pressure, except in the case
of elevator recall. The unit includes two single-pole double-throw snap action switches used to operate local alarms, indicate signals
to annunciator panels, trip municipal fi re alarm boxes, start fi re pumps, or any other function that can be initiated or controlled by the
opening or closing of an electrical switch. The device may be installed on the main riser to give a system waterfl ow signal or on branch
feed mains, cross mains, or branch lines to give a waterfl ow signal by zone or area.
2. LISTINGS AND APPROVALS
Model VSR-F and VS-SP
UL Listed - Guide No. USQT
FM Approved - Waterfl ow Detectors, Vane Type
Model VSR-D 10"
UL Listed - System Extinguishing Attachments - Guide No. USQT
3. TECHNICAL DATA
Specifications:
Manufacturer: Potter Electric Signal Company
Water Working Pressure:
Model VS-SP rated for water working service pressure up to 250 psi (1 730 mm) kPa)
for size 1-1/2" (40 mm)
Model VSR-F rated for water working service pressure up to 450 psi (3 013 kPa) for sizes 2" (50 mm) to 8" (200 mm)
Model VSR-F 10" rated for water working service pressure up to 300 psi (2 076 kPa) for size 10" (250 mm)
Switches:
Model VSR-F
Two single-pole double-throw switches with Form C contacts rated at 15 Amps 125/250 V. AC, 2.0 Amp 0-30 V. DC. Each switch can
be wired for open or closed circuit operation. See Figure 2.
Model VS-SP
Two single-pole double-throw switches with Form C contacts rated at 15 Amps 125/250 V. AC, 2.5 Amp 0-30 V. DC. Each switch can
be wired for open or closed circuit operation. See Figure 2.
Adjustability for Flow Sensitivity:
Pneumatic retard adjustable from 0 to approximately 90 seconds with automatic resetting.
Unit may be installed vertically or horizontally. Vane is corrosion resistant plastic. CAUTION: Vane-type waterfl ow indicators should
be used only in wet-pipe systems and not in dry, deluge, or preaction systems. The paddle and/or mechanism may be damaged by
the sudden surge of water in those systems.
Material Standards:
Body: Cast Aluminum
Base: Cast aluminum.
Enclosure: Die-cast, red enamel fi nish
Cover held in place with tamper resistant screws
Ordering Information:
See Table 1
4. INSTALLATION
The waterfl ow indicator must be located on the system side of the system control valve, check valve, and main drain valve. Install a
minimum of 6 inches (147 mm) from any fi tting that changes the direction of the waterfl ow and 24 inches (588 mm) from a valve or
drain. The device may be mounted on horizontal or vertical pipe. On horizontal piping, the unit should be mounted in a vertical position
with the cover on top. If necessary, it may be mounted off center, but never exceed an angle greater than 90 degrees from vertical.
Close the water supply control valve and drain the system, relieving all pressure. At the selected location, drill a hole in the pipe using
a circular saw in a slow-speed drill. The 2" (50 mm) and 2-1/2" (65 mm) devices require a 1-1/4" (32 mm) hole. All other sizes require
a 2" (50 mm) hole. De-burr the hole and clean the pipe of all growth ad other material for a distance equal to the pipe diameter on
each side of the hole.
Form No. F_051889
TECHNICAL DATA
Revised page replaces page 703a-b dated September 23, 2005
Alarm Devices 703a
WATERFLOW
INDICATOR
Viking Technical Data may be found on
The Viking Corporation's Web site at
http://www.vikinggroupinc.com.
The Web site may include a more recent
edition of this Technical Data Page.
(Revised Format)