Model WD Water Detector and Sensor TapeBulletin L-WDSpecifications - Installation and Operating InstructionsW.E. ANDERSON DIV., DWYERINSTRUMENTS, INC.P.O. BOX 358 • MICHIGAN CITY, INDIANA 46360 U.S.A.Phone: 219/879-8000www.dwyer-inst.comFax: 219/872-9057e-mail: info@dwyermail.com©Copyright 2014 Dwyer Instruments, Inc.Printed in U.S.A. 9/14FR# R3-443384-00 Rev.1The small and discreet Model WD Water Detectoris designed for dependabledetection of low levels of conductive liquids. The module features a sturdy and reli-able aluminum enclosure and is powered by 24 VAC or 24 to 30 VDC. Water sens-ing tape attaches to module and if any liquid comes in contact with the tape theresistance is changed and the alarm will be triggered. The tape is hydrophobic so itdoes not absorb any of the liquid it is detecting which makes for a faster drying timeand faster return to service after a water leak.The sensing tape is 1˝ wide and can be bought in lengths of 5, 10, 15 and 25 feet.Multiple tapes can be connected together to extend the coverage area which makesit ideal for domestic as well as commercial applications. Typical uses include com-puter rooms, telecommunication facilities, in drip pans under HVAC equipment andaround water pumps.INSTALLATIONRemove front panel of device. Run wires through back plate and make terminations.Reassemble front panel. Plug the tape into the module and fasten the mountingscrews. Use included plastic clips to mount tape to clean and dry surface. Contactcement provides a more secure installation than double face tape. Fold tape on it-self to make sharp corners. Insulate tape from conduits and ground wires. Ground-ed tape may cause detector failure.OPERATION AND TROUBLESHOOTINGGreen LED will indicate proper power. Red LED is an alarm indicator. The water de-tector will go to alarm contact state on loss of power or if the tape sensor is removed.An open or shorted tape will be sensed by the detector and will produce an alarmcontact state as well. The “Test” button can be used to test module operation. De-pressing the button will simulate water detection on the tape and produce an alarmcontact state. It is important to dry sensing cable with paper towel in case alarm hasbeen caused by water. Do not allow water to evaporate on its own. Conductiveresidue will be left behind which will change tape’s resistance. In worst case falsealarms may occur over time.If alarm is present and water cannot be located:1.Disconnect tape2.Unplug end of line (EOL) resistor from end of tape3.Plug EOL resistor into the moduleIf alarm clears then replace the tape.If alarm persists then replace the module.WIRINGModel WD Water Detector is provided with round opening for 1/2˝ conduit or flexconnector. Terminations are made to screw terminal connectors shown in Figure 1.Both outputs of alarm relay function identically. Contacts could be connected in par-allel if load is heavier than 1A @ 24V. Do not apply voltages greater than 30 to alarmoutputs.SPECIFICATIONSService: Conductive Liquid.Switch Type: DPDT.Electrical Rating: 1A @ 24 VAC/VDC.Power Requirements: 24 VAC, 24 to 30 VDC.Power Consumption: 35 mA maximum.Electrical Connections: Screw terminals.Conduit Connections: Hole for 1/2˝ conduit.Enclosure: Extruded aluminum.Sensor Tape: 1˝ (25.4 mm) wide and 5, 10, 15 or 25 feet long.Weight: 8 oz (.23 kg).MAINTENANCEUpon final installation of the Model WD Water Detector, no routine maintenance isrequired. A periodic check of the system calibration is recommended. The ModelWD is not field serviceable and should be returned if repair is needed (field repairshould not be attempted and may void warranty). Be sure to include a brief de-scription of the problem plus any relevant application notes. Contact customer ser-vice to receive a return goods authorization number before shipping.RELAYOUTPUT 1RELAYOUTPUT 2POWER24 VAC OR DCCONTACTS AS SHOWNWHEN DEVICE IS POWEREDAND NO ALARM PRESENT+OR–Ø1/4[Ø6.35]1-1/2[38.10]1/4[6.35]4-1/4[107.32]4-3/4[120.02]PUSHBUTTON15 PIN CABLECONNECTIONAMBERLED LIGHTGREENLED LIGHT1/8[2.10]1-3/4[44.17]3[76.38]1/2˝ CONDUIT OR FLEXCONNECTORØ7/8[Ø22.23]WDTESTWATER DETECTORALARMPOWERFigure 1: Wiring ConnectionsNext >