System Sensor WFDN Series Waterflow Detector

WFDN Series Detector System Sensor WFDN series is compatible with 7 through 40 steel pipe for sizes 2 in through in and compatible with schedule 10 through 40 steel sizes 5 in through 8 in and can be mounted in a or horizontal position New directional cover allows installers and inspectors to see the direction of flow UL listed models are NEMA 4 rated New cover provides a better seal is lighter weight not painted corrosion resistant Sealed retard mechanism immune to dust and other contaminants Less exposed metal reduces shock hazard plastic cover acts as 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 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 Listings new WFDN Series waterflow detectors from System Sensor of a rugged NEMA 4 rated enclosure that is more damage than previous metal designs The waterflow detector is for both indoor and outdoor use with the widest available range from 32 to 150 They are also approved for on the widest range of pipe schedules sizes 2 in through in are approved for installation on pipe schedules 7 through 40 models are equipped with tamper resistant cover screws prevent unauthorized entry Inside two sets of SPDT Form C switches are enclosed in a durable terminal block with layout designed to make wiring easy with wire ready terminals terminals are on a different elevation large barrier between and easy to read raised textured lettering all make wiring An optional cover tamper switch is available securely snaps place no tools required WFDN series incorporates a mechanical time delay feature minimizes the risk of false alarm due to pressure surges or air in the fire sprinkler system The larger and easy to turn timer makes setting the waterflow detector easy with high contrast printed markings The dial offers three tabs to help with turning one larger tab located on the dial position for approximately 60 a notch is also indicated on the dial to locate approximately seconds making setting the detector in dimmly lit locations easy WFDN series is designed for accuracy and repeatability The also offers improved performance during vibration in riser where detectors are exposed to a large in rush of water Detector Specifications Specifications waterflow detectors shall be installed on system piping as designated on the drawing and or as specified herein Detectors shall 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 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 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 after a preset time delay that is field adjustable The delay mechanism shall be a sealed mechanical pneumatic unit with visual and indication of actuation The actuation mechanism shall include a ethylene vinyl acetate vane inserted through a hole in the pipe and by a mechanical linkage to the delay mechanism Outputs shall consist of dual SPDT switches Form C contacts Two conduit for standard fittings of commonly used electrical conduit shall be provided on the detectors A grounding provision is provided Unless enclosures shall be NEMA 4 listed by Underwriters Laboratories Inc All detectors shall be listed by Underwriters Laboratories Inc for or outdoor use Specifications Pressure Rating Surge Threshold Flow Rate Entrances Temperature Range Rating Tamper Switch PSI Feet Per Second FPS GPM Use openings for in conduit 4 rated plugs to 150 0 to 66 4 suitable for indoor outdoor use with ULC models optional for models part no CTS Sprinkler NFPA 13 or Two Family Dwelling NFPA 13D Occupancies up to 4 Stories 13R National Fire Alarm Code NFPA 72 Years Ratings Pipe sets of SPDT Form C A HP 125 250 VAC A 6 12 24 VDC water pipe schedule through 40 Field Wiring Diagram Dimensions Installed CM CM WIDTH PIPE DIAMETER 6.4 CM 2.5 DIAMETER 12.7 CM Size Size Weights Model Information Model 2 in 4 in rated for use with Schedule 7 through 40 pipe 6 in 8 in rated for use with Schedule 10 through 40 pipe mechanism and switch assembly switch kit wrench for cover lbs lbs lbs lbs lbs lbs lbs in in in in in in in in in in in in in in Ohio Avenue St Charles IL 60174 800 SENSOR2 Fax 630 377 6495 specifications subject to change without notice Visit systemsensor com current product information including the latest version of this data sheet System Sensor 11 16