3825 Ohio Avenue • St. Charles, IL 60174

Phone: 800-SENSOR2 • Fax: 630-377-6495

www.systemsensor.com

©2016 System Sensor.

Product specifications subject to change without notice. Visit systemsensor.com

for current product information, including the latest version of this data sheet.

WFDS85300 • 11/16

Ordering Information

UL Model

Description

WFDNFS

Waterflow Detector with Glue In CPVC adapter , Fits 1in., 1¼in., 1½in., 2in. CPVC tees

WFDNFT

Waterflow Detector with Threaded CPVC adapter , Fits 1in., 1¼in., 1½in., 2in. brass threaded and copper sweat tees;

1in., 1½in. CPVC tees

Accessories

FS-RT

Delay mechanism and switch assembly

CTS

Tamper-proof switch kit

WFDW

Tamper-proof wrench for cover

Engineering Specifications

Model shall be WFDNFS or WFDNFT as manufactured by System Sensor. Waterflow detectors shall be installed on a 1”, 1¼”., 1½”. or

2”. CPVC tee manufactured by Tyco, Spears, NIBBCO, or IPEX as designated on the drawing and /or as specified herein. Detectors shall

mount on any clear pipe span of the appropriate nominal size, either a vertical upflow or horizontal run at least 6˝ from any fittings or valves

that may change water direction, flow rate, or pipe diameter or no closer than 24in. from a valve or drain. Detectors shall have a sensitivity

in the range of 4 to 10 gallons per minute and a static pressure rating of 175 psi. The WFDNFS or WFDNFT detector with incorporated

time delay mechanism shall respond to waterflow in the specified direction after a preset time delay that is field adjustable. The delay

mechanism shall be a sealed mechanical pneumatic unit with visual and audible indication of actuation. The actuation mechanism shall

include a ethylene vinyl acetate vane inserted through a hole in the pipe and connected by a mechanical linkage to the delay mechanism.

Outputs shall consist of dual SPDT switches (Form C contacts). Two conduit entrances for standard fittings of commonly used electrical

conduit shall be provided on the detectors. A grounding provision is provided. Unless noted, enclosures shall be NEMA 4 listed by

Underwriters Laboratories Inc. All detectors shall be listed by Underwriters Laboratories Inc. for indoor or outdoor use.

Waterflow Detector Specifications

Standard Specifications

Static Pressure Rating

175 PSI

Operating Temperature Range

32°F to 150°F (0°C to 60°C)

Maximum Surge

18 Feet Per Second (FPS)

Enclosure Rating*

NEMA 4 – suitable for indoor/outdoor use

Triggering Threshold

Bandwidth (Flow Rate)

4 – 10 GPM

Cover Tamper Switch

Optional, part no. CTS

Conduit Entrances

Two openings for ½in. conduit.

NEMA 4 rated plugs

Service Use

Automatic Sprinkler: NFPA-13

One or Two Family Dwelling: NFPA 13D

Residential Occupancies up to 4 Stories:

NFPA 13R

National Fire Alarm Code: NFPA-72

Contact Ratings

Two sets of SPDT (Form C)

10.0 A, ½ HP @ 125/250 VAC

2.5 A @ 6/12/24 VDC

Compatible Tee Fittings

1”

Warranty

3 Years

WFDNFS / WFDNFT Field Wiring Diagram

Overall Dimensions, Installed WFDNFS, WFDNFT

W0400-00

W0401-00

3-1/2"

2-5/8"

4-1/2"

TEE

DEPTH

PLASTIC VANE

LOCKING

COLLAR

TEE

ADAPTER

TEE FITTING

3-1/2"

2-5/8"

TEE

DEPTH

4-3/32

PLASTIC VANE

LOCKING

COLLAR

TEE

ADAPTER

TEE FITTING