System Sensor WFD Series Installation And Maintenance Instructions Manual

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D770-01-00 1 I56-459-07WFD Vane-type WaterflowDetectorsINSTALLATION AND MAINTENANCE INSTRUCTIONSA Division of Pittway3825 Ohio Avenue, St. Charles, Illinois 601741-800-SENSOR2, FAX: 630-377-6495ImportantPlease Read Carefully And SaveThis instruction manual contains important informationabout the installation and operation of waterflow detectors.Purchasers who install waterflow detectors for use by oth-ers must leave this manual or a copy of it with the user.Read all instructions carefully before beginning. Followonly those instructions that apply to the model you are in-stalling.CAUTIONUse vane-type waterflow detectors in wet-pipe systemsonly. Do NOT use them in dry pipe, deluge, or preactionsystems. The sudden inrush of water in such systems maybreak the vane or damage the mechanism.Do not use in potentially explosive atmospheres. Do not al-low unused wires to remain exposed.SpecificationsContact Ratings: 10 A @ 125/250 VAC2.5 A @ 24 VDCTriggering Threshold Bandwidth (Flow Rate): 4 to 10 gpmStatic Pressure Rating: 250 PSI (Max) 2" – 8"Dimensions, Installed: 3.5"H x 3.0"W x 6.7"DOperating Temperature Range: 32°F to 120° F (0°C to 49°C)Compatible Pipe: Steel water pipe, schedule 10 or 40.Shipping Weight: 4 to 7 lb., according to size.Enclosure Rating: NEMA 4, as tested by Underwriters Laboratories, Inc.(requires optional Outdoor Cover Gasket Model WFDN4 and cover part #C58-164-01)Principles Of OperationVane-type waterflow detectors mount to water-filled pipesin sprinkler systems. Waterflow in the pipe deflects a vane,which produces a switched output–usually after a specifieddelay. All waterflow detectors have a pneumatically con-trolled mechanical delay mechanism. Delays do NOT accu-mulate; they reset if the flow of water stops before theentire delay has elapsed. All switches actuate when the wa-ter flow rate is 10 gallons per minute or greater, but will notactuate if the flow rate is less than 4 gallons per minute.This System Sensor installation manual covers the follow-ing waterflow detectors for sprinkler/fire alarm applica-tions.ModelsWFD20 Waterflow detector, Schedule 10/40, 2"WFD25 Waterflow detector, Schedule 10/40, 2-1/2"WFD30 Waterflow detector, Schedule 10/40, 3"WFD35 Waterflow detector, Schedule 10/40, 3-1/2"WFD40 Waterflow detector. Schedule 10/40, 4"WFD50 Waterflow detector, Schedule 10/40, 5"WFD60 Waterflow detector, Schedule 10/40, 6"WFD80 Waterflow detector, Schedule 10/40, 8"Technical Manuals Online! - http://www.tech-man.com