D770-24-00 1 I56-1452-002WFDEXP Explosion ProofVane-type Waterflow DetectorsINSTALLATION 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 information about the instal-lation and operation of waterflow detectors. Purchasers who installwaterflow detectors for use by others must leave this manual or a copy ofit with the user.Read all instructions carefully before beginning. Follow only those instruc-tions that apply to the model you are installing.CAUTIONUse vane-type waterflow detectors in wet-pipe systems only. Do NOT usethem in dry pipe, deluge, or preaction systems. The sudden inrush of wa-ter in such systems may break the vane or damage the mechanism.Principles Of OperationVane-type waterflow detectors mount to water-filled pipes in sprinkler sys-tems. Waterflow in the pipe deflects a vane, which produces a switchedoutput–usually after a specified delay. All waterflow detectors have apneumatically controlled mechanical delay mechanism. Delays do NOTaccumulate; they reset if the flow of water stops before the entire delayhas elapsed. All switches actuate when the water flow rate is 10 gallonsper minute or greater, but will not actuate if the flow rate is less than 4gallons per minute. This System Sensor installation manual covers the fol-lowing waterflow detectors for sprinkler/fire alarm applications.ModelsWFD20EXP Waterflow detector, Schedule 10/40, 2"WFD25EXP Waterflow detector, Schedule 10/40, 2-1/2"WFD30EXP Waterflow detector, Schedule 10/40, 3"WFD30-2EXP Waterflow detector, Schedule 10/40, 3"WFD35EXP Waterflow detector, Schedule 10/40, 3-1/2"WFD40EXP Waterflow detector. Schedule 10/40, 4"WFD50EXP Waterflow detector, Schedule 10/40, 5"WFD60EXP Waterflow detector, Schedule 10/40, 6"WFD80EXP Waterflow detector, Schedule 10/40, 8"CAUTIONDo NOT use any of the WFD models on copper pipe. The clamping forcesof the mounting bolts may collapse the pipe sufficiently to prevent the de-tector from functioning properly.Do NOT install steel or iron pipe sections in copper piping for mounting awaterflow detector. Incompatibility between the dissimilar metals causesbimetallic corrosion.SpecificationsContact Ratings: 10 A @ 125/250 VAC; 2.5 A @ 24 VDCTriggering Threshold Bandwidth (Flow Rate): 4 to 10 gpmStatic Pressure Rating: 450 PSI (Max) 2" – 8"Dimensions, Installed: 4.0"H x 8.8"W x 7.0"DOperating Temperature Range: 32° F to 120° F (0° C to 49° C)Compatible Pipe: Steel water pipe, schedule 10 or 40.Shipping Weight: According to size.Enclosure Rating: NEMA 4 indoor/outdoor useHazardous Atmosphere Classification:Class I, Groups B, C, D Div, 1; Class II, Groups E, F, G Div. 1; Class III Div. 1NOTE: Not for use in potable water systems, systems where sand orother material is present or systems employing other than water.Installation GuidelinesBefore installing any waterflow alarm device, be thoroughly familiar with:NFPA 72: National Fire Alarm CodeNFPA 13: Installation of Sprinkler Systems, Section 3.17NFPA 25: Inspection, Testing and Maintenance of Sprinkler SystemsOther applicable NFPA standards, local codes, and the requirements of theauthority having jurisdictionFailure to follow these directions may prevent the device from reportingthe flow of water in the event the associated sprinkler system is activatedby a fire. System Sensor is not responsible for devices that have been im-properly installed, tested, or maintained.1. Mount the detector where there is adequate clearance for installationand removal and a clear view of it for inspections. See Figure 1 formounting dimensions.2. Locate to protect from damage – 6 to 7 feet above the floor.3. On horizontal runs, position the detector on the top or side of the pipe.Do not mount it upside down because condensation may collect in thehousing and impair the operation of the detector. For vertical flow ap-plications, mount the detector on pipe through which water flows up-ward. Otherwise, the unit may not operate properly.4. Mount the detector at least 6 inches from a fitting that changes the di-rection of water flow and no less than 24 inches from a valve or drain.5. Be sure the direction-of-flow arrow matches the direction of flowin the pipe.CAUTIONContact the appropriate personnel regarding the proper tools and proce-dures when installing this device in a “HAZARDOUS” area. Disconnectsupply circuits before opening the cover, to reduce the chances of ignitionof hazardous atmospheres. Secure the cover and cover screws prior to ac-tivating circuits. Tighten cover screws to 40 in. lbs. min.~SYsTENI'-~ SENSOR®IAIAIA