WFDE Series Waterflow Detector The System Sensor WFDE series is compatible with pipe diameters ranging from 50mm through 200mm and can be mounted in a vertical or horizontal position. Robust Construction. The WFDE series consists of a rugged, IP54-rated enclosure. Designed for both indoor and outdoor use, the WFDE series operates across a wide temperature range, from 0°C to 68°C (32°F to 155°F). Features •Compliant with Construction Products Directive •EC Certificate Number 0786‑CPD‑40151 •WFD30-2E models install in 50.8mm (2”) hole sizes •IP54-rated enclosure •Sealed retard mechanism assures that the retard is not contaminated by dust and dirt when the cover is removed •Visual switch activation permits installer to accurately set the retard, even under extremely noisy conditions •Rugged, dual SPDT switches are enclosed in a durable terminal block for added strength •100% synchronization activates both alarm panel and local bell simultaneously Agency Listings TE83724 VdS G4940006 Scientific Services Laboratory 1Z0A7.AH afp-836 0786 Reliable Performance. WFDE models are equipped with tamperresistant cover screws to prevent unauthorized entry. Inside, two sets of SPDT (Form C) synchronized switches are enclosed in a durable terminal block to ensure reliable performance. False Alarm Immunity. The WFDE 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 WFDE 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. Waterflow Detector Specifications Engineering Specifications Vane-type System Sensor WFDE series waterflow detectors shall be installed on system piping as designated on the drawings 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 15 cm (6 in.) from any fittings, which may change water direction, flow rate or pipe diameter, or no closer than 61 cm (24 in.) from a valve or drain. The detector shall respond to waterflow in the specified direction after a preset time delay, which 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 (one of which is a knockout type) for standard fittings of commonly used electrical conduit shall be provided on the detectors. A grounding provision is provided. WFDE waterflow detectors shall be approved by Factory Mutual, LPC, VdS and SSL. Standard Specifications Static Pressure Rating LPC: 17.25 BAR (250 PSI) VdS: PN16 (16 BAR, 232 PSI) 30–57 liters/minute 10.0 A @ 125/250 VAC 2.5 A @ 24 VDC Triggering Threshold Bandwidth (Flow Rate) Contact Ratings; Two sets of SPDT (Form C) Conduit Entrances Operating Temperature Range Enclosure Rating U.S. Patent Numbers Warranty Two openings 22.2mm (.875 in.) diameter. One open, one knock-out type 0°C to 68°C (32°F to 155°F) IP54 5,213,205 3 Years WFDE Field Wiring Diagram Compatible Pipe Model Ref. Pipe Size mm (in.) WFD20E 50 (2) WFD25E 65 (2½) WFD30-2E 80 (3) WFD40E 100 (4) WFD60E 150 (6) WFD80E 200 (8) Shipping Weight WFD20E Model WFD25E 1.85 kg (4.08 lbs.) Nominal Pipe O.D. (mm) LPC VdS 60.3 60.3 76.0 76.1 88.8 88.9 114.1 114.3 165.1 168.3 219.1 219.1 Wall Thickness (mm) LPC VdS 3.6 2.3/2.9 3.6 2.6/2.9 4.0 2.9/3.2 4.5 3.2/3.6 5.0 4.0/4.5 6.3 4.5/5.9 WFD30-2E WFD40E WFD60E WFD80E 2.05 kg (4.53 lbs.) 3.03 kg (6.68 lbs.) 3.45 kg (7.70 lbs.) 2.36 kg (5.20 lbs.) UL-LISTED COMPATIBLE CONTROL PANEL SSM24-X SSV120-X POWER + 24VDC OR 120VDC – INITIATING LOOP + SUGGESTED EOL RESISTOR – 20 10 25 5 0 15 Dial setting 0 5 10 15 20 25 CONTACT RATINGS 125/250 VAC 10 AMPS 24 VDC 2.5 AMPS SCHEMATIC OF INDIVIDUAL SWITCH IN “NO WATERFLOW” CONDITION A-NC COM B-NO BREAK WIRE AS SHOWN FOR SUPERVISION OF CONNECTION. DO NOT ALLOW STRIPPED WIRE LEADS TO EXTEND BEYOND SWITCH HOUSING. DO NOT LOOP WIRES. Delay Adjustment Dial 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. Ordering Information Model Pipe Size WFD20E 50mm (2”) WFD25E 65mm (2½”) WFD30-2E 80mm (3”) WFD40E 100mm (4”) WFD60E 150mm (6”) WFD80E 200mm (8”) Hole Size 31.8mm (1¼”) 31.8mm (1¼”) 50.8mm (2”) 50.8mm (2”) 50.8mm (2”) 50.8mm (2”) Dial setting equals delay in seconds. Reference only. 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. A05-0243-008 • 2/09 • #1924