Waterflow Detector Specifications
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.
Standard Specifications
Static Pressure Rating
Maximum Surge
175 PSI
Operating Temperature Range 32°F to 150°F (0°C to 60°C)
18 Feet Per Second (FPS)
4 – 10 GPM
Enclosure Rating*
NEMA 4 – suitable for indoor/outdoor use
Triggering Threshold
Bandwidth (Flow Rate)
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
3-1/2"
3-1/2"
2-5/8"
2-5/8"
4-3/32
4-1/2"
LOCKING
COLLAR
LOCKING
COLLAR
TEE
ADAPTER
TEE
ADAPTER
TEE FITTING
TEE FITTING
TEE
TEE
DEPTH
DEPTH
PLASTIC VANE
PLASTIC VANE
W0400-00
W0401-00
Ordering Information
UL Model
WFDNFS
WFDNFT
Description
Waterflow Detector with Glue In CPVC adapter , Fits 1in., 1¼in., 1½in., 2in. CPVC tees
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
Tamper-proof switch kit
CTS
WFDW
Tamper-proof wrench for cover
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
SYSTEMSENSOR [ SYSTEMSENSOR ADVANCED IDEAS. ]
