I56-4044-000R INSTALLATION AND MAINTENANCE INSTRUCTIONS 3825 Ohio Avenue, St. Charles, Illinois 60174 1-800-SENSOR2, FAX: 630-377-6495 www.systemsensor.com WFDTNRN Vane-type Water flow Detector SPECIFICATIONS Contact Ratings: Triggering Threshold Bandwidth (Flow Rate): Static Pressure Rating: Dimensions (Installed): Operating Temperature Range: Shipping Weight: Enclosure Rating: U. S. Patent Number: 10 A @ 125/250 VAC ; 2.5 A @ 24 VDC 4 to 10 GPM 250 PSI (Max.) 4in H x 3½ in W x 6¾ in D 32°F to 150°F (0°C to 66°C) 2 lbs NEMA 4 5,213,205 IMPORTANT Please Read Carefully And Save FIGURE 1. MOUNTING DIMENSIONS: 3-1/2" This instruction manual contains important information about the installation and operation of water flow detectors. Purchasers who install water flow detectors for use by others must leave this manual or a copy of it with the user. Read all instructions carefully before beginning. 2-5/8" CAUTION 4" The model WFDTNRN is a vane-type water flow detector for use in wet-pipe fire sprinkler systems only. Vane-type water flow detectors shall not be used as the sole initiating device in both deluge and preaction systems; water flow detectors used in these types of systems may result in an unintended discharge caused by a surge, trapped air or a short retard time. TEE ADAPTER INSTALLATION GAUGE WARNING TEE DEPTH Installation must be performed by qualified personnel and in accordance with all national and local codes and ordinances. END OF PADDLE TREE MUST FIT BETWEEN TOP OF TEE AND BOTTOM OF FLANGE TEE FITTING PLASTIC VANE Shock hazard: Disconnect power source before servicing. Serious injury or death could result. INSTALLATION GUIDELINES Before installing any water flow alarm device, be thoroughly familiar with: PRINCIPLES OF OPERATION Vane-type water flow detectors mount to water filled pipes in fire sprinkler systems. Water flow in the pipe deflects a vane. Deflection of the vane produces a switched output. All detectors will activate on a sustained flow of water greater than 10 gallons per minute (gpm) but will not activate if the flow rate is less than 4 gpm. NFPA 72: Installation, Maintenance and Use of Local Protective Signalling Systems NFPA 13: Installation of Sprinkler Systems, specifically Section 3.17 NFPA 25:Inspection, Testing and Maintenance of Sprinkler Systems, specifically Chapters 4 and 5, and Section 5.3.3.2 NFPA 13D: Standard for Residential Dwellings NFPA 13R: Standard for Multifamily Dwellings COMPATIBLE PIPE TEES/RISERS Model WFDTNRN is supplied with 12 paddles. One paddle is provided for each size of the threaded, sweat or plastic tee. See Figure 1 and approximate tee depth chart. Each paddle has an indication that shows the pipe size and type of tee to be used with. FIGURE 2. ASSEMBLY DIAGRAM: COVER TAMPER PROOF WRENCH (P/N WFDW) APPROXIMATE TEE DEPTH REQUIREMENTS (SEE FIGURE 1) Tee Depth Threaded Sweat CPVC 1 × 1 × 1˝ 11/4 × 11/4 × 1˝ 11/2 × 11/2 × 1˝ 2 × 2 × 1˝ 21/8˝ 21/2˝ 23/4˝ 31/4˝ 13/4˝ 21/6˝ 21/4˝ 23/4˝ 21/4˝ N/A N/A N/A CPVC/Spears/ NIBBCO 215/32˝ N/A N/A N/A W0390-00 DESIGNED TO FIT WITHIN 2 X 4 STUD WALL CONSTRUCTION Risk of explosion: Not for use in hazardous locations. Serious injury or death could result. CPVC/Tyco/ NIBBCO 213/16˝ N/A N/A N/A TIMER ASSEMBLY (P/N FS-RT) COVER TAMPER SWITCH (OPTIONAL P/N CTS) GROUND SCREW GASKET MOUNTING PLATE FLOW ACTUATOR LEVER WATERFLOW 1" NPT THREAD PADDLE FILISTER HEAD SCREW W0388-00 SS-200-024 1 I56-4044-000R OPERATIONAL TESTING Always notify a central station monitoring water flow alarms before repairing, maintaining, or testing water flow alarm devices. Other applicable NFPA standards, local codes and the requirements of the authority having jurisdiction. Failure to follow these directions may result in failure of the device to report a water flow condition. System Sensor is not responsible for devices that have been improperly installed, tested or maintained. 1.Fill the fire sprinkler system and check for leaks around the WFDTNRN. If it leaks, check to see that the fittings are tight. If leak persists, drain the system and remove the detector (see removal instructions under Maintenance). Check for damaged threads or cracked fitting. Reinstall detector and check again for leaks. Do not proceed until all leaks have been stopped. 2.With cover removed, connect an ohmmeter or continuity tester across (COM and B-NO) terminal switch contacts. The ohmmeter should show an open circuit, no continuity (when the red switch buttons are depressed). 3.Deflect the actuator lever to release the switch buttons. The ohmmeter or continuity tester should show a short circuit when the switch buttons are released. 4.Open the inspector’s test valve to allow the detector to indicate a flow condition. The detector should remain activated until the inspector’s test valve is closed. Air pockets in the sprinkler system may prevent the detector from firing immediately. 5.Replace the cover and tighten the security screws with the tamper proof wrench. Store wrench is a secure place. FIELD WIRING 1. The WFDTNRN has two SPDT switches. Switch contacts (COM and B-NO) are closed when water is flowing and open when water is not flowing. Connect the switches as shown in Figure 4 depending on the application. 2.When connected to a listed sprinkler/fire alarm control panel, the initiating circuit must be be unable to be silenced. 3.A ground screw is provided with all WFDTNRN units. When grounding is required, clamp wire with screw in hole located between conduit entrance holes. See Figure 5. 1.Mount the detector where there is adequate clearance for installation and removal and a clear view of it for inspection. See Figure 1 for mounting dimensions. 2.Locate the detector 6 to 7 feet above the floor to protect from accidental damage. 3.On horizontal runs, position the detector on top or side of the pipe. Do not mount it upside down. 4.Mount detector at least 6 inches from a fitting which changes the direction of the water flow, or no less than 24 inches from a valve or drain. 5.BE SURE DIRECTION-OF-FLOW ARROW AND DIRECTIONAL COVER MATCHES ACTUAL DIRECTION OF FLOW IN THE PIPE. See Figure 3. MOUNTING INSTRUCTIONS 1.This WFDTNRN water flow detector is designed to fit only the appropriate tee fitting. NOTE:The outlet branch of tee must have a 1-inch NPT thread. Do not use a reducer to achieve the correct thread size. Failure to follow this instruction will result in failure of the detector to report a water flow condition. 2.WFDT units are shipped without the paddles mounted to the actuator. Select the correct size paddle for the tee being used the appropriate nominal pipe diameter size is molded on the surface of the paddles. Align hole on stem of paddle with hole on actuator lever. Fasten together using a #4-40 x 3/8-inch fillister head screw supplied in bag assembly. See Figure 2. Use only the screw provided with the WFDTNRN. Drive screw head through hole in paddle until it seats firmly to actuator lever surface. No washer is required. For paddle replacement refer to Maintenance section. 3.Thread detector onto tee fitting and tighten with wrench. Use of thread sealant or tape is recommended. Use height gage (located at end of paddle tree) to ensure proper depth of detector on tee fitting. See Figure 1. Height gage must fit between top of tee fitting and under side of hex tee adapter. A gap between gage and tee adapter is acceptable. When correctly installed, the detector must face in the proper direction of water flow and be aligned with the pipe, the provided directional cover illustrates flow direction for device. 4.Remove the plastic cover with the tamper proof wrench provided. Move the actuator lever back and forth to check for binding. If the vane binds, remove the detector and correct the problem before proceeding. 4.If a second conduit entry is required, remove the knockout plug using a flat blade screwdriver as shown on Figure 5. Strike sharply with a hammer to pierce the wall of the knockout plug. Move to an adjacent wall section and repeat until the plug falls out. Make sure that the waterflow detector is supported adequately during this operation to avoid injury. 5. Use proper waterproof conduit fittings where required. WARNING High Voltage. Electrocution Hazard. Do not handle live AC wiring or work on a device to which AC power is applied. Doing so may result in severe injury or death. When utilizing switches at voltages greater than 74VDC or 49VAC means to provide all–pole disconnection must be incorporated in the field wiring, such as a circuit breaker. CAUTION Be sure the direction-of-flow arrow and directional cover points in the correct direction, otherwise a water flow condition will go unreported. See Figure 3. FIGURE 3. DIRECTIONAL COVER: NOTCHED COVER INDICATES FLOW DIRECTION AT A DISTANCE FROM MULTIPLE VIEWING ANGLES W0382-00 SS-200-024 2 I56-4044-000R FIGURE 4. FIELD WIRING: W0395-00 MAINTENANCE To prevent accidental water damage, control valves should be shut tightly and the system completely drained before water flow detectors are removed or replaced. FIGURE 5.: Inspect detectors in accordance with applicable NFPA codes and standards and/or the authority having jurisdiction for leaks, and replace if leaks occur. Test detectors at least quarterly as described in Operational Testing to insure proper operation. Test more often if required by the authority having jurisdiction. GROUND SCREW Under normal conditions System Sensor water flow detectors should provide years of trouble-free service. However, if the switch enclosure becomes faulty, request Part No. FS-RT and ensure timer is set to zero. If damage occurs to paddle, order replacement kit. Refer to procedure below for removal of detector on pipe. Do not repair or replace any other water flow detector components in the field. If any other part of the detector does not perform properly, replace the entire detector. Failure to follow this instruction may result in failure of the detector to report a water flow condition. W0383-00 Proceed as follows to remove a detector: 1. 2. 3. Drain the pipe Turn off electrical power to the detector, and then disconnect wiring Unscrew WFDTNRN from tee fitting SS-200-024 3 I56-4044-000R WARNING THE LIMITATIONS OF WATER FLOW ALARM DEVICES 1. Water flow detectors may not work or operate properly if sprinkler piping being 3. Vane-type water flow detectors have a normal service life of 10-15 years. Hard water monitored is plugged with pipe scale, mud, stones or other foreign material. Sprinkler systems, however, may substantially reduce water flow detector service life. systems should be checked regularly for such blocking material, following the instruc4. Water flow detectors are not a substitute for insurance. Building owners should always tions in Chapter 5 of NFPA Standard 13A. insure property and lives being protected by sprinkler systems. 2. Alarms generated by the activation of water flow detectors may not be received by 5. If valves controlling the water supply to a sprinkler system are closed, vane-type water a central station if telephone or other communication lines to the detector are out of flow detectors will not work. All valves controlling a sprinkler water supply should be service, disabled, or open. sealed or locked in the normally open position. The normally open position should be monitored by a sprinkler supervisory switch. Please refer to insert for the Limitations of Fire Alarm Systems THREE-YEAR LIMITED WARRANTY Department, RA #__________, 3825 Ohio Avenue, St. Charles, IL 60174. Please include a System Sensor warrants its enclosed water flow detector to be free from defects in manote describing the malfunction and suspected cause of failure. The Company shall not terials and workmanship under normal use and service for a period of three years from be obligated to repair or replace units which are found to be defective because of damage, date of manufacture. System Sensor makes no other express warranty for this water flow unreasonable use, modifications, or alterations occurring after the date of manufacture. detector. No agent, representative, dealer, or employee of the Company has the authority In no case shall the Company be liable for any consequential or incidental damages for to increase or alter the obligations or limitations of this Warranty. The Company’s obligabreach of this or any other Warranty, expressed or implied whatsoever, even if the loss tion of this Warranty shall be limited to the repair or replacement of any part of the water or damage is caused by the Company’s negligence or fault. Some states do not allow the flow detector which is found to be defective in materials or workmanship under normal exclusion or limitation of incidental or consequential damages, so the above limitation use and service during the three year period commencing with the date of manufacture. or exclusion may not apply to you. This Warranty gives you specific legal rights, and you After phoning System Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return may also have other rights which vary from state to state. Authorization number, send defective units postage prepaid to: System Sensor, Return SS-200-024 4 I56-4044-000R ©2014 System Sensor