System Sensor WFDE Series Water Flow Detectors

WFDE Series Detector System Sensor WFDE series is compatible with pipe ranging from 50mm through 200mm and be mounted in a vertical or horizontal position with Construction Products Directive Certificate Number 0786 CPD 40151 models install in 50.8mm 2 hole sizes enclosure retard mechanism assures that the retard is not by dust and dirt when the cover is removed switch activation permits installer to accurately set the retard under extremely noisy conditions dual SPDT switches are enclosed in a durable terminal for added strength synchronization activates both alarm panel and local bell Construction The WFDE series consists of a rugged enclosure Designed for both indoor and outdoor use WFDE series operates across a wide temperature range from to 68 32 to 155 Performance WFDE models are equipped with tamper cover screws to prevent unauthorized entry Inside two sets SPDT Form C synchronized switches are enclosed in a durable block to ensure reliable performance Alarm Immunity The WFDE series incorporates a retard feature which minimizes the risk of false alarm to pressure surges or air trapped in the sprinkler system In the mechanical retard unique sealed design is immune dust and other contaminants Operation The WFDE 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 Services Detector Specifications Specifications System Sensor WFDE series waterflow detectors shall be installed on system piping as designated on the drawings and or as specified herein 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 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 waterflow in the specified direction after a preset time delay which is field adjustable The delay mechanism shall be a sealed mechanical pneumatic with visual indication of actuation The actuation mechanism shall include a polyethylene vane inserted through a hole in the pipe and connected a mechanical linkage to the delay mechanism Outputs shall consist of dual SPDT switches Form C contacts Two conduit entrances one of which is knockout type for standard fittings of commonly used electrical conduit shall be provided on the detectors A grounding provision is provided WFDE detectors shall be approved by Factory Mutual LPC VdS and SSL Specifications Pressure Rating Threshold Bandwidth Flow Rate Ratings Two sets of SPDT Form C Entrances Temperature Range Rating Patent Numbers 17.25 BAR 250 PSI PN16 16 BAR 232 PSI liters minute A 125 250 VAC A 24 VDC openings 22.2mm 875 in diameter One open one knock out type to 68 32 to 155 Years Pipe mm 2 2 Pipe 80 3 4 6 8 Weight kg lbs Pipe O D Thickness WFD40E WFD60E WFD80E kg lbs kg lbs kg lbs kg lbs Adjustment Dial setting setting equals delay in seconds Reference only Field Wiring Diagram PANEL OR COMMON AND B NO WILL CLOSE VANE IS DEFLECTED I E WATER IS FLOWING DUAL PERMIT TO BE COMBINED A SINGLE DETECTOR EOL VAC RATINGS AMPS AMPS VDC OF IN WATERFLOW WIRE AS FOR OF DO ALLOW WIRE TO EXTEND SWITCH DO NOT WIRES Information Size 2 2 3 4 6 8 Size 1 1 2 2 2 2 specifications subject to change without notice Visit systemsensor com for product information including the latest version of this data sheet