WFD Series Waterflow Detector The System Sensor WFD series is compatible with schedule 10 through 40 steel pipe, sizes 2˝ through 8˝, and can be mounted in a vertical or horizontal position. Features •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 local bell Agency Listings CS169 7770-1653:114 Reliable Performance. UL-listed models are equipped with tamper-resistant cover screws to prevent unauthorized entry. Inside, two sets of SPDT (Form C) synchronized switches are enclosed in a durable terminal block to assure reliable performance. False Alarm Immunity. The WFD series incorporates a mechanical retard feature, which minimizes the risk of false alarm due to pressure surges or air trapped in the sprinkler system. In addition, the mechanical retard’s unique sealed design is immune to dust and other contaminants. Simplified Operation. The WFD series is designed to simplify installation. Two conduit openings permit easy attachment to the local alarm system. The retard mechanism and dual SPDT switches are field-replaceable. •Tamper-resistant cover screws S739 Robust Construction. The WFD series consists of a rugged, NEMA 4-rated enclosure. Designed for both indoor and outdoor use, the WFD series operates across a wide temperature range, from 32°F to 120°F. 167-93-E 3006195 Waterflow Detector Specifications 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˝ from any fittings that may change water direction, flow 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 static 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 adjustable. The delay mechanism shall be a sealed mechanical pneumatic unit with visual indication of actuation. The actuation mechanism shall include a polyethylene 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. Two openings for ½˝ conduit. One open, one knock-out type Two sets of SPDT (Form C) 10.0 A, ½ HP @ 125/250 VAC 2.5 A @ 6/12/24 VDC Steel water pipe, schedule 10 through 40 UL-LISTED COMPATIBLE CONTROL PANEL SSM24-X SSV120-X SUGGESTED EOL RESISTOR CONTACT RATINGS 125/250 VAC 10 AMPS 24 VDC 2.5 AMPS SCHEMATIC OF INDIVIDUAL SWITCH IN “NO WATERFLOW” CONDITION Overall Dimensions, Installed 3.75″ DELAY ADJUSTMENT DIAL DIAL IS APP R ON R DELAY IN SECO OXI ND MA BE M IME S T Model Width Model Width WFD20 4.6″ WFD40 6.8″ WFD25 4.6″ WFD50 7.8″ WFD30-2 5.2″ WFD60 9.0″ WFD35 5.7″ WFD80 10.8″ 3.0″ 30 – Delay Adjustment Dial NOTE: COMMON AND B-NO CONNECTIONS WILL CLOSE WHEN VANE IS DEFLECTED, I.E., WHEN WATER IS FLOWING. DUAL SWITCHES PERMIT APPLICATIONS TO BE COMBINED ON A SINGLE DETECTOR. 15 INITIATING LOOP + 3 Years TE POWER + 24VDC OR 120VDC – Warranty 70 WFD Field Wiring Diagram NU Compatible Pipe 55 Contact Ratings Operating Temperature Range 32°F to 120°F (0°C to 49°C) Enclosure Rating* NEMA 4 – suitable for indoor/outdoor use Cover Tamper Switch Standard with ULC models, optional for UL models, part no. 546-7000 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 U.S. Patent Numbers 5,213,205 450 PSI* 18 Feet Per Second (FPS) 4–10 GPM 0 Standard Specifications Static Pressure Rating Maximum Surge Triggering Threshold Bandwidth (Flow Rate) Conduit Entrances U bolt nut A-NC COM B-NO 1.6″ Pipe saddle 45 BREAK WIRE AS SHOWN FOR SUPERVISION OF CONNECTION. DO NOT ALLOW STRIPPED WIRE LEADS TO EXTEND BEYOND SWITCH HOUSING. DO NOT LOOP WIRES. Pipe Plastic vane NOTE: RETARD TIME MAY EXCEED 90 SECONDS. ADJUST AND VERIFY THAT TIME DOES NOT EXCEED 90 SECONDS. NUMBER ON DIAL IS APPROXIMATE TIME DELAY IN SECONDS WITH AN ACCURACY OF +/− 50%. U bolt Width: See Table Ordering Information UL Model ULC Model WFD20 WFD20A WFD25 WFD25A WFD30-2 WFD30-2A WFD35 WFD35A WFD40 WFD40A WFD50 WFD50A WFD60* WFD60A WFD80* WFD80A Accessories A3008-00 Retard mechanism A77-01-02 Terminal block 546-7000 Tamper-proof switch kit WFDW Tamper-proof wrench for cover WFDN4 Gasket kit Pipe Size 2˝ 2½˝ 3˝ 3½˝ 4˝ 5˝ 6˝ 8˝ Hole Size 1¼˝ 1¼˝ 2˝ 1¼˝ 2˝ 2˝ 2˝ 2˝ Shipping Weight 4.2 lbs. 4.3 lbs. 4.5 lbs. 4.7 lbs. 5.2 lbs. 6.3 lbs. 6.8 lbs. 7.5 lbs. *Maximum pressure rating 400 psi as approved by Factory Mutual. 3825 Ohio Avenue • St. Charles, IL 60174 Phone: 800-SENSOR2 • Fax: 630-377-6495 ©2009 System Sensor. Product specifications subject to change without notice. Visit systemsensor.com for current product information, including the latest version of this data sheet. A05-0180-013 • 1/09 • #1922