System Sensor WFD25 User Manual

Top View
Switch 1
COM
COM
ABBA
Switch 2
NOTE: Common and B connections will
close when vane is deflected, i.e.,
when water is flowing. Dual switches
permit applications to be combined
on a single detector.
COM
COM
COM
COM
Typical FACP Connection
B
COM
Typical Local Bell Connection
Break wire as shown for
supervision of connection.
DO NOT allow stripped wire
leads to extend beyond
switch housing. Do NOT
loop wires.
end-of-line resistor
to nonsilenceable initiating 
zone of listed FACP
to power source
compatible
with bell
local
bell
CONTACT RATINGS
125/250 VAC
24 VDC
10 AMPS
2.5 AMPS
B
B
B
B
WFD
WFD
WFD Switch
Assembly
(Multiple Detectors)
A78-1586-00
Figure 4. WFD wiring:
GROUND
SCREW
(GREEN)
MOUNTING
PLATE
Figure 5A. Ground screw location: Figure 5B. Knockout plug removal:
A78-1914-03A78-2063-00
D770-01-00 5 I56-459-07
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System Sensor WFD25 Specifications

General

Type	Waterflow Detector
Operating Temperature	32°F to 120°F (0°C to 49°C)
Power Source	24V AC/DC
Humidity Range	0% to 93% Non-condensing
Operating Voltage Range	24 VDC
Contact Ratings	2.0 A @ 30 VDC (resistive)
Pipe Size	2" (inch)
Operating Voltage	24 VDC
Compatibility	Compatible with listed alarm panel

Summary

Waterflow Detector Installation and Operation

Principles of Operation

Installation Guidelines

Key considerations for installing waterflow detectors, including pipe compatibility and location.

Mechanical Delay Adjustment

Maintenance

Supervisory Switch Installation and Operation

General Installation Considerations

Installation Instructions for Post Indicator Valves

Specific steps for installing supervisory switches on post indicator valves.

Installation Instructions For Butterfly Valves

Specific steps for installing supervisory switches on butterfly valves.

Testing

Procedures for testing the operation of supervisory switches.

Cover Tamper Switch Installation and Operation

Installation Guidelines

Mounting Instructions

Steps for attaching the cover tamper switch to terminal blocks.

Pressure Switch Installation and Operation

Operation

Wiring

Wiring instructions for connecting pressure switches.

Adjustments To Factory Settings

Alarm Bell Installation and Operation

Installation

Instructions for mounting and installing alarm bells.

Operational Testing

Procedures for testing the functionality of alarm bells.