wfd series waterfow detector 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 32f to 120f. 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 retards unique sealed design is immune to dust and other contaminants. simplifed 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 feld-replaceable. agency listings 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 ? tamper-resistant cover screws 167-93-e 7770-1653:114 3006195 cs169 s739
engineering specifcations vane-type waterfow detectors shall be installed on system piping as designated on the drawing and/or as specifed herein. detectors shall mount on any clear pipe span of the appropriate nominal size, either a vertical upfow or horizontal run, at least 6? from any fttings that may change water direction, fow 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? C 8? pipes. the detector shall respond to waterfow in the specifed direction after a preset time delay that is feld 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 fttings 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. waterflow detector specifications 3825 ohio avenue ? st. charles, il 60174 phone: 800-sensor2 ? fax: 630-377-6495 ?2009 system sensor. product specifcations 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 standard specifcations static pressure rating 450 psi* operating temperature range 32f to 120f (0c to 49c) maximum surge 18 feet per second (fps) enclosure rating* nema 4 C suitable for indoor/outdoor use triggering threshold bandwidth (flow rate) 4C10 gpm cover tamper switch standard with ulc models, optional for ul models, part no. 546-7000 conduit entrances two openings for ?? conduit. one open, one knock-out type 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 contact ratings two sets of spdt (form c) 10.0 a, ? hp @ 125/250 vac 2.5 a @ 6/12/24 vdc u.s. patent numbers 5,213,205 compatible pipe steel water pipe, schedule 10 through 40 warranty 3 years dela y adjustment dial 55 70 0 15 45 30 t i m e d e l a y i n s e c o n d s n u m b e r o n d i a l i s a p p r o x i m a t e no te: ret ard time ma y exceed 90 seconds. adjust and verify tha t time does not exceed 90 seconds. number on dial is approxima te time dela y in seconds with an accurac y of +/? 50%. delay adjustment dial + + C C ssm24-x ssv120-x no te: common and b-no connections will close when v ane is deflected, i.e., when wa ter is flowing. dual switches permit applica tions to be combined on a single detect or. break wire as shown for super vision of connection. do not allow stripped wire leads to extend beyond switch housing. do not loop wires. power 24vdc or 120vdc initia ting loop ul-listed com pa tible control p anel cont act ra tings 125/250 vac 24 vdc 10 amps 2.5 amps schema tic of individual switch in no wa terflow condition suggested eol resist or b-no com a-nc wfd field wiring diagram ordering information ul model ulc model pipe size hole size shipping weight wfd20 wfd20a 2? 1?? 4.2 lbs. wfd25 wfd25a 2?? 1?? 4.3 lbs. wfd30-2 wfd30-2a 3? 2? 4.5 lbs. wfd35 wfd35a 3?? 1?? 4.7 lbs. wfd40 wfd40a 4? 2? 5.2 lbs. wfd50 wfd50a 5? 2? 6.3 lbs. wfd60* wfd60a 6? 2? 6.8 lbs. WFD80* WFD80a 8? 2? 7.5 lbs. 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 *maximum pressure rating 400 psi as approved by factory mutual. 3.0 3.75 pipe saddle u bolt nu t width: see ta bl e plastic va ne pipe u bolt 1.6 model wfd20 wfd25 wfd30-2 wfd35 width 4.6 4.6 5.2 5.7 model wfd40 wfd50 wfd60 WFD80 width 6.8 7.8 9.0 10.8 overall dimensions, installed
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