The System Sensor WFD Series vane-type waterflow detector,
with a computer designed paddle, fits Schedule 10 through
Schedule 40 steel pipe sizes 2_through 8_. The design of this
unit makes it easy to install and simple to maintain. It can be
mounted in a vertical or horizontal position and is suitable for
indoor and UL-listed outdoor wte-pipe sprinkler installations.
Switch assembly and delay mechanism assembly are field
Assures that the adjustable retard is not contaminated by dust
and dirt when the cover is removed.
Visual Switch Activation
Permits installer to accurately set the retard even under
extremely noisy conditions.
Mechanical Delay Adjustment
The pneumatic delay is
preset at dial setting 2 in
the factory. To adjust the
delay, move the adjustment
dial to the desired number.
Rugged Switch Assembly
Switches are enclosed in a
durable terminal block for
added strength. Accommodates up to 12 AWG wire.
Activates both alarm panel and local bell at the same time.
Durable Tamper Resistant Enclosure
Red epoxy painted metal cover completely encloses the electrical
components to keep out dust and dirt. Improved self-guiding
security screws and removal tool make detector resistant to
tampering; wiring diagram inside cover simplifies field
Static Pressure Rating:
250 PSI (Max.)
Triggering Threshold Bandwidth (Flow Rate):
Steel water pipe, schedule 10 through 40
Two sets of S.P.D.T. (Form C)
10.0 A @ 125/250 VAC
2.5 A@ 24 VDC
Two openings for 1/2_conduit
Operating Temperature Range:
32 _ to 120 _ (0_ to 49_)
For schedules 10 through 40,
sizes 2 through 8