WFDN SYSTEMSENSOR | Alldatasheet
Document overview
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Technical content
Features
- New directional cover allows installers and inspectors to easily see the direction of flow
- UL-listed models are NEMA 4 rated
- New cover provides a better seal, is lighter weight, not painted and corrosion resistant
- Sealed retard mechanism immune to dust and other contaminants
- Less exposed metal reduces shock hazard, plastic cover acts as insulator and is resistant to arcing
- Visual switch activation
- Audible switch activation (73 dBA)
- Field-replaceable timer/switch assembly
- Accommodates up to 12 AWG wire
- Switch Synchronization activates both alarm panel and local bell or horn strobe
- Tamper-resistant cover screws
- Improved water sealing
- Reduced product weight
- Wire-ready terminals
- Improved wiring with new terminal block layout
- Snap-in optional cover tamper switch
- Improved timer repeatability and accuracy 30512667770-1653:0231S739
Engineering Specifications Vane-type waterflow detectors shall be installed on system piping 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 in. from any fittings that may change water direction, flow rate, or pipe diameter or no closer than 24 in. 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 450 psi for 2 in. – 8 in. pipes. The detector 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 450 PSI Operating Temperature Range 32°F to 150°F (0°C to 66°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 Standard with ULC models, optional for UL models, part no. CTS Conduit Entrances Two openings for ½ in. 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 Pipe Steel water pipe, schedule 7 through 40* WFDN Field Wiring Diagram 8.9 CM (3.5") 6.6 CM (2.6") PIPE DIAMETER PLUS 12.7 CM (5") PIPE VANE OVERALL WIDTH = PIPE DIAMETER + 6.4 CM (2.5") U-BOLT NUT PIPE SADDLE U-BOLT PIPE Overall Dimensions, Installed 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. WFDS87903 • 11/16
Ordering Information
UL Model ULC Model Pipe Size Hole Size Shipping Weights WFD20N WFD20NA 2 in. 1¼ in. 2.6 lbs. WFD25N WFD25NA 2½ in. 1¼ in. 2.6 lbs. WFD30N WFD30NA 3 in. 2 in. 3.1 lbs. WFD40N WFD40NA 4 in. 2 in. 4.0 lbs. WFD50N WFD50NA 5 in. 2 in. 4.9 lbs. WFD60N WFD60NA 6 in. 2 in. 5.6 lbs. WFD80N WFD80NA 8 in. 2 in. 7.3 lbs. Accessories FS-RT Delay mechanism and switch assembly CTS Tamper-proof switch kit WFDW Tamper-proof wrench for cover