System Sensor Water Flow Detectors

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WFD Series Detector System Sensor WFD series is compatible schedule 10 through 40 steel pipe sizes through 8 and can be mounted in a vertical horizontal position Two inch mounting hole provided in new WFD30 2 models UL listed models are NEMA 4 rated Sealed retard mechanism immune to dust and other contaminants Visual switch activation Field replaceable retard mechanism and SPDT switches Rugged dual SPDT switches enclosed in a durable terminal block Accommodates up to 12 AWG wire Designed for both indoor and outdoor use 100 percent synchronization activates both alarm panel and bell Tamper resistant cover screws Construction The WFD series consists of a rugged 4 rated enclosure Designed for both indoor and outdoor the WFD series operates across a wide temperature range from to 120 Performance UL listed models are equipped with cover screws to prevent unauthorized entry Inside sets of SPDT Form C synchronized switches are enclosed in a terminal block to assure reliable performance Alarm Immunity The WFD series incorporates a mechanical feature which minimizes the risk of false alarm due to surges or air trapped in the sprinkler system In addition mechanical retard unique sealed design is immune to dust and contaminants Operation The WFD series is designed to simplify Two conduit openings permit easy attachment to the alarm system The retard mechanism and dual SPDT switches field replaceable Listings Detector Specifications Specifications waterflow detectors shall be installed on system piping as designated on the drawing and or as specified herein Detectors shall mount on any pipe span of the appropriate nominal size either a vertical upflow or horizontal run at least 6 from any fittings that may change water direction rate or pipe diameter or no closer than 24 from a valve or drain Detectors shall have a sensitivity in the range of 4 to 10 gallons per minute and a pressure rating of 450 psi for 2 8 pipes The detector shall respond to waterflow in the specified direction after a preset time delay that is field The delay mechanism shall be a sealed mechanical pneumatic unit with visual indication of actuation The actuation mechanism shall include polyethylene vane inserted through a hole in the pipe and connected by a mechanical linkage to the delay mechanism Outputs shall consist of dual switches Form C contacts Two conduit entrances for standard fittings of commonly used electrical conduit shall be provided on the detectors grounding provision is provided Unless noted enclosures shall be NEMA 4 listed by Underwriters Laboratories Inc All detectors shall be listed by Laboratories Inc for indoor or outdoor use Specifications Pressure Rating Surge Threshold Flow Rate Entrances PSI Feet Per Second FPS GPM Temperature Range 32 to 120 0 to 49 Rating Tamper Switch openings for conduit open one knock out type Use 4 suitable for indoor outdoor use with ULC models optional for UL part no 546 7000 Sprinkler NFPA 13 or Two Family Dwelling NFPA 13D Occupancies up to 4 Stories NFPA 13R Fire Alarm Code NFPA 72 Ratings Pipe sets of SPDT Form C A HP 125 250 VAC A 6 12 24 VDC water pipe schedule 10 through 40 Patent Numbers Years Field Wiring Diagram Adjustment Dial Dimensions Installed COMMON AND B NO WILL CLOSE VANE IS DEFLECTED I E WATER IS FLOWING DUAL PERMIT TO BE COMBINED A SINGLE DETECTOR D I AL IS APPRO O N D E L AY IN SECO M M B PANEL OR EOL VAC RATINGS AMPS AMPS VDC OF IN WATERFLOW WIRE AS FOR OF DO ALLOW WIRE TO EXTEND SWITCH DO NOT WIRES RETARD TIME MAY EXCEED 90 SECONDS ADJUST VERIFY THAT TIME DOES NOT EXCEED 90 SECONDS ON DIAL IS APPROXIMATE TIME DELAY IN WITH AN ACCURACY OF 50 bolt bolt nut saddle vane Size See Table Weight lbs lbs lbs lbs lbs lbs lbs lbs Model Information Model mechanism block switch kit wrench for cover kit Size pressure rating 400 psi as approved by Factory Mutual Ohio Avenue St Charles IL 60174 800 SENSOR2 Fax 630 377 6495 System Sensor specifications subject to change without notice Visit systemsensor com for product information including the latest version of this data sheet 1 09 1922

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