I56-4051-001R INSTALLATION AND MAINTENANCE INSTRUCTIONS 3825 Ohio Avenue, St. Charles, Illinois 60174 1-800-SENSOR2, FAX: 630-377-6495 www.systemsensor.com WFDEN Vane-type Water flow Detector SPECIFICATIONS Contact Ratings: Triggering Flow Rate: Static Pressure Rating (maximum): Operating Temperature Ranges: Compatible Pipe: Shipping Weight: Enclosure Rating: ~ 10 A @ 125/250 VAC ; 2.5 A @ 24 VDC Refer to Table 1 17.25 bar (250 psi) (1725 KPa); 16 bar (VdS) 0°C to 68°C (32°F to 155°F) Steel Water Pipe (Refer to Table 1) 3 to 6 lbs (according to size) Nema4/IP54 IMPORTANT Please Read Carefully And Save STEEL PIPE COMPATIBILITY CAUTION 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. Do not use any of the WFDEN models on copper pipe. The clamping forces of the mounting bolts may collapse the pipe sufficiently to prevent the detector from functioning properly. Read all instructions carefully before beginning. Follow only those instructions that apply to the model you are installing. Do NOT install steel or iron pipe sections in copper piping for mounting a waterflow detector. Incompatibility between the dissimilar metals causes bimetallic corrosion. CAUTION The model WFDEN 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. INSTALLATION GUIDELINES Before installing any water flow alarm device, be thoroughly familiar with national codes of practice and the requirements of the authority having jurisdiction. NOTE: Installation methods other than those listed in this installation manual may prevent the device from reporting the flow of water in the event the associated fire sprinkler system is activated by a fire. System Sensor is not responsible for devices that have been improperly installed, tested or maintained. WARNING Installation must be performed by qualified personnel and in accordance with all national and local codes and ordinances. 1.Mount the detector where there is adequate clearance for installation and removal and a clear view of it for inspections. See Figure 1 for mounting dimensions. 2.Locate the unit 1.8 – 2.1 meters above the floor to protect from accidental damage. 3.On horizontal runs, the detector must be positioned on the top of the pipe, not on the side or below. Do not mount it upside down because condensation may collect in the housing and impair the operation of the detector. For vertical flow applications, mount detector on pipe through which water flows upward. Otherwise, the unit may not operate properly. 4.Mount detector at least 15 cm from a fitting that changes the direction of the water flow, or no closer than 61 cm 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 6. MOUNTING INSTRUCTIONS 1. Drain the pipe. 2.Cut a hole in the pipe in the desired location. Center the hole on the pipe as shown in Figure 2, and be sure the hole is perpendicular to the center of the pipe. Before drilling, use a punch or scribe to mark the drill site to prevent the bit from slipping. If the hole is off center, the vane will bind against the inside wall of the pipe. Use a drill or hole saw to cut a hole of the proper diameter. See Table 2 for hole size. Shock hazard: Disconnect power source before servicing. Serious injury or death could result. Risk of explosion: Not for use in hazardous locations. Serious injury or death could result. 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, which produces a switched output, usually after a specified delay. All WFDENs have a pneumatically controlled mechanical delay mechanism. Delays do NOT accumulate; they reset if the flow of water stops or drops below minimum triggering flow rate before the entire delay has elapsed. All switches actuate on a sustained flow of water greater than the maximum specified in Table 1, but will not activate if the flow rate is less than the minimum specified in Table 1. This System Sensor installation manual covers the following water flow detectors for fire sprinkler/fire alarm applications. TABLE 1: Model Number DN Ref. Pipe Size mm (in) WFD20EN WFD25EN WFD30EN WFD40EN WFD60EN WFD80EN 50 (2) 66 (2,5) 80 (3) 100 (4) 150 (6) 200 (8) SS-200-031 EC–certificate Number: 0786-CPD-40151 EN12259–5 VdS Nominal Wall Triggering Pipe Thickness Flow Rate O.D. (mm) (liters/min) (mm) 60.3 2.3/2.9 76.1 2.6/2.9 88.9 2.9/3.2 30-57 114.3 3.2/3.6 168.3 4.0/4.5 219.1 4.5/5.9 LPCB Nominal Pipe O.D. (mm) Wall Thickness (mm) 60.3 76.0 88.8 114.1 165.1 219.1 3.6 3.6 4.0 4.5 5.0 6.3 CAUTION When drilling the hole with a hole saw, make certain that center of hole saw cut does not remain in pipe. 1 I56-4051-001R TABLE 2: FIGURE 2. LOCATION OF MOUNTING HOLE TOP VIEW: MODEL NUMBER HOLE DIAMETER TORQUE SETTING WFD20EN 31.8 mm +1.6 mm 11/4 in +1/16 in 40.7 - 47.5 NT-M 30 - 35 FT-LBS 50.8 mm + 1.6 mm 2 in +1/16 in 61.6 - 67.8 MT-M 45 - 50 FT-LBS WFD25EN WRONG WFD30EN WFD40EN WFD60EN WFD80EN RIGHT 3.Remove burrs and sharp edges from the hole. Clean and remove all scale and foreign matter from the inside wall of pipe for a distance equal to the pipe diameter on either side of the hole to ensure free movement of the vane. Clean the outside of the pipe to remove dirt, metal chips, and cutting lubricant. 4.Seat the saddle gasket against the saddle and mount detector directly to pipe. Carefully roll the vane opposite the direction of flow and insert it through the hole (see Figure 5). Seat the saddle firmly against the pipe so that the locating boss goes into the hole. 5.Install the U-bolt, tightening the nuts alternately to ensure a uniform seal (see Table 2 for torque values). 6.Remove the 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 cause before proceeding. REMOVE BURRS FROM EDGE OF HOLE. CLEAN OUT SCALE AND FOREIGN MATTER FROM INSIDE WALL OF PIPE. W0106-00 PIPE PREOPERATION TESTING 1.Fill the fire sprinkler system and check for leaks around the waterflow detector. If it leaks, first check for proper torque on U-bolt nuts. If leak persists, drain the system and remove the detector (refer to Maintenance). Check for dirt or foreign objects under the gasket, and make sure that the pipe surface is not dented. Reinstall the detector and check again for leaks. Do not proceed until all leaks have been stopped. 2.Connect an ohmmeter or continuity tester across COM and B-NO switch terminals. The ohmmeter should indicate an open circuit. 3.Deflect the actuator lever and hold it until the pneumatic delay shaft releases the switch buttons. The ohmmeter or continuity tester should show a short circuit after the delay has elapsed. If there is no delay, check the setting of the delay adjustment dial. FIELD WIRING 1.All models have two SPDT switches. Switch contacts COM and B-NO are closed when water is flowing and open when water is not. Connect the switches as shown in Figure 7 depending on the application. 2.When connected to a listed fire sprinkler/fire alarm control panel, the initiating circuit must be unable to be silenced. 3.A ground screw is provided with all waterflow detectors. When grounding is required, clamp wire with screw in hole located between conduit entrance holes, see Figure 5. 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. PIPE VANE 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. CAUTION Be sure the direction-of-flow arrow and directional cover point in the correct direction, or else water flow will go unreported. See Figure 4. FIGURE 1. MOUNTING DIMENSIONS: 8.9 CM (3.5") 6.6 CM (2.6") PIPE DIAMETER PLUS 12.7 CM (5") U-BOLT NUT PIPE SADDLE WARNING U-BOLT 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. ~ OVERALL WIDTH = PIPE DIAMETER + 6.4 CM (2.5") W0384-00 MECHANICAL DELAY ADJUSTMENT The pneumatic delay is preset at the factory to a dial setting of approximately 25 seconds. To adjust the setting, turn the adjustment dial clockwise to increase the delay, counterclockwise to decrease it. Delay can be adjusted over a range from 0 to 30 seconds maximum, see Figure 3. NOTE: Set the delay to the minimum required to prevent false alarms due to flow surges. Periodically test time delay as required by Authority Having Jurisdiction or code authority. SS-200-031 2 I56-4051-001R FIGURE 3. DELAY ADJUSTMENT DIAL: FIGURE 4. ASSEMBLY DIAGRAM: DELAY ADJUSTMENT DIAL TAMPER PROOF WRENCH (P/N WFDW) COVER TIMER (REPLACEMENT P/N FS-RT) COVER TAMPER SWITCH (OPTIONAL P/N CTS) ELECTRICAL CONDUIT ENTRANCE MOUNTING PLATE PIPE SADDLE NOTE: NUMBER ON DIAL IS APPROXIMATE TIME DELAY IN SECONDS. U-BOLT NUT ROLL PADDLE OPPOSITE OF FLOW ARROW WHILE INSERTING W0386-01 OPERATIONAL TESTING Always notify the central station monitoring water flow alarms before repairing, maintaining or testing waterflow alarm devices. SADDLE GASKET 1.Replace the cover and tighten the tamper-proof screws with the tamperproof wrench. Store the wrench in a secure place. 2.Open the inspector’s test valve and time how long it takes for 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 increase the apparent time delay. MAINTENANCE To prevent accidental water damage, control valves should be shut tight and the system completely drained before water flow detectors are removed or replaced. PIPE W FLO TER WA Inspect detectors detector in accordance with applicable codes and standards and/or the Authority Having Jurisdiction for leaks and replace if a leak occurs. Test detectors at least quarterly as described under Operational Testing to ensure proper operation. Test more often as required by applicable codes or standards. REFER TO TABLE 1 U-BOLT W0392-01 FIGURE 5. GROUND SCREW LOCATION: Under normal conditions System Sensor water flow detectors should provide years of trouble-free service. If any part of the detector does not perform properly, replace the entire detector. Installation methods other than those listed in this installation manual may prevent the device from reporting the flow of water in the event the associated fire sprinkler system is activated by a fire. System Sensor is not responsible for devices that have been improperly installed, tested, or maintained. GROUND SCREW Proceed as follows to remove a detector: 1. Drain the pipe. 2. Turn off electrical power to the detector, and then disconnect wiring. 3. Loosen nuts and remove U-bolts. 4.Gently lift the saddle far enough to get your fingers under it. With your fingers, roll the vane so it will fit through the hole while continuing to lift the water flow detector saddle. 5. Lift detector clear of pipe. W0383-00 CAUTION If a vane breaks off in a pipe, find and remove it. If it is not removed, the vane may restrict the proper flow of water to all or part of the fire sprinkler system. SS-200-031 3 I56-4051-001R FIGURE 6. DIRECTIONAL COVER: NOTCHED COVER INDICATES FLOW DIRECTION AT A DISTANCE FROM MULTIPLE VIEWING ANGLES W0382-00 FIGURE 7. FIELD WIRING: POWER 24VDC OR 120VAC INITIATING LOOP NOTE: COMMON AND B-NO CONNECTIONS WILL CLOSE WHEN VANE IS DEFLECTED, I.E., WHEN WATER IS FLOWING. DUAL SWITCHES PERMIT APPLICATIONS TO BE COMBINED ON A SINGLE DETECTOR. SSM24-X SSV120-X UL-LISTED COMPATIBLE CONTROL PANEL + - CONTACT RATINGS + 125/250 VAC SUGGESTED EOL RESISTOR 24 VDC - SCHEMATIC OF INDIVIDUAL SWITCH IN "NO WATERFLOW" CONDITION 10 AMPS 2.5 AMPS A-NC COM B-NO BREAK WIRE AS SHOWN FOR SUPERVISION OF CONNECTION. DO NOT ALLOW STRIPPED WIRE LEADS TO EXTEND BEYOND SWITCH HOUSING. DO NOT LOOP WIRES. W0393-00 Please refer to insert for the Limitations of Fire Alarm Systems WARNING THE LIMITATIONS OF WATER FLOW ALARM DEVICES 4. W ater flow detectors are not a substitute for insurance. Building owners should always insure property and lives being protected by sprinkler systems. 5. If valves controlling the water supply to a sprinkler system are closed, vane-type water flow detectors will not work. All valves controlling a sprinkler water supply should be sealed or locked in the normally open position. The normally open position should be monitored by a sprinkler supervisory switch. 1. W ater flow detectors may not work or operate properly if sprinkler piping being monitored is plugged with pipe scale, mud, stones or other foreign material. Sprinkler systems should be checked regularly for such blocking material. 2. Alarms generated by the activation of water flow detectors may not be received by a central station if telephone or other communication lines to the detector are out of service, disabled, or open. 3. Vane-type water flow detectors have a normal service life of 10–15 years. Hard water systems, however, may reduce water flow detector service life significantly. THREE-YEAR LIMITED WARRANTY #__________, 3825 Ohio Avenue, St. Charles, IL 60174. Please include a note describing System Sensor warrants its enclosed product to be free from defects in materials and the malfunction and suspected cause of failure. The Company shall not be obligated to workmanship under normal use and service for a period of three years from date of replace units which are found to be defective because of damage, unreasonable use, manufacture. System Sensor makes no other express warranty for this air duct smoke modifications, or alterations occurring after the date of manufacture. In no case shall the detector. No agent, representative, dealer, or employee of the Company has the authority Company be liable for any consequential or incidental damages for breach of this or any to increase or alter the obligations or limitations of this Warranty. The Company’s obligaother Warranty, expressed or implied whatsoever, even if the loss or damage is caused by tion of this Warranty shall be limited to the replacement of any part of the product which the Company’s negligence or fault. Some states do not allow the exclusion or limitation of is found to be defective in materials or workmanship under normal use and service incidental or consequential damages, so the above limitation or exclusion may not apply during the three year period commencing with the date of manufacture. After phoning to you. This Warranty gives you specific legal rights, and you may also have other rights System Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return Authorization which vary from state to state. number, send defective units postage prepaid to: System Sensor, Returns Department, RA SS-200-031 4 I56-4051-001R ©2015 System Sensor