WFD Vane-type Waterflow Detectors
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1 INSTLLTION ND MINTENNCE INSTRUCTIONS WFD Vane-type Waterflow Detectors Division of Pittway 3825 Ohio venue, St. Charles, Illinois SENSOR2, FX: Specifications Contact Ratings: 125/250 VC 24 VDC Triggering Threshold andwidth (Flow Rate): 4 to 10 gpm Static Pressure Rating: 250 PSI (Max) 2" 8" Dimensions, Installed: 3.5"H x 3.0"W x 6.7"D Operating 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: NEM 4, as tested by Underwriters Laboratories, Inc. (requires optional Outdoor Cover Gasket Model WFDN4 and cover part #C ) Important Please Read Carefully nd Save This instruction manual contains important information about the installation and operation of waterflow detectors. Purchasers who install waterflow detectors for use by others must leave this manual or a copy of it with the user. Read all instructions carefully before beginning. Follow only those instructions that apply to the model you are installing. CUTION Use vane-type waterflow detectors in wet-pipe systems only. Do NOT use them in dry pipe, deluge, or preaction systems. The sudden inrush of water in such systems may break the vane or damage the mechanism. Do not use in potentially explosive atmospheres. Do not allow unused wires to remain exposed. Principles Of Operation Vane-type waterflow detectors mount to water-filled pipes in sprinkler systems. Waterflow in the pipe deflects a vane, which produces a switched output usually after a specified delay. ll waterflow detectors have a pneumatically controlled mechanical delay mechanism. Delays do NOT accumulate; they reset if the flow of water stops before the entire delay has elapsed. ll switches actuate when the water flow rate is 10 gallons per minute or greater, but will not actuate if the flow rate is less than 4 gallons per minute. This System Sensor installation manual covers the following waterflow detectors for sprinkler/fire alarm applications. Models WFD20 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" D I
2 CUTION Do NOT use any of the WFD models on copper pipe. The clamping forces of the mounting bolts may collapse the pipe sufficiently to prevent the detector from functioning properly. Do NOT install steel or iron pipe sections in copper piping for mounting a waterflow detector. Incompatibility between the dissimilar metals causes bimetallic corrosion. Figure 1. Mounting dimensions: 3" 3-3/4" Pipe diameter plus 5-1/4" Installation Guidelines efore installing any waterflow alarm device, be thoroughly familiar with: NFP 72: National Fire larm Code NFP 13: Installation of Sprinkler Systems, Section 3.17 NFP 25: Inspection, Testing and Maintenance of Sprinkler Systems Other applicable NFP standards, local codes, and the requirements of the authority having jurisdiction Failure to follow these directions may prevent the device from reporting the flow of water in the event the associated sprinkler system is activated by a fire. System Sensor is not responsible for devices that have been improperly installed, tested, or maintained. U-bolt nut Pipe saddle U-bolt Overall width = pipe diameter + 3" Pipe Plastic vane 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 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 the housing and impair the operation of the detector. For vertical flow applications, mount the detector on pipe through which water flows upward. Otherwise, the unit may not operate properly. 4. Mount the detector at least 6 inches from a fitting that changes the direction of water flow and no less than 24 inches from a valve or drain. 5. e sure the direction-of-flow arrow matches the direction of flow in the pipe. Mounting Instructions 1. Drain the pipe. 2. Cut a hole at the desired location. Center the hole in the pipe, as shown in Figure 2, and be sure the hole is perpendicular to the center of the pipe. efore 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 1 for hole size. Figure 2. Mounting hole location: Wrong Right Remove burrs from edge of hole. Clean out scale and foreign matter for one pipe diameter on each side of hole D I
3 Table 1: Table 2: WFD SIZE Hole Size WFD SIZE Torque 2" - 3-1/2" 1-1/4" 4" - 8" 2" 2" - 3-1/2" ft-lb 4" - 8" ft-lb CUTION When drilling the hole with a hole saw, make certain that the center of the cut does not remain in the pipe. 3. Remove burrs and sharp edges from the hole. Clean and remove all scale and foreign matter from the inside of the pipe for one diameter on each 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 O-ring or gasket against the saddle and mount the detector directly to the pipe. Carefully roll the vane opposite the direction of flow and insert it through the hole. 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 metal 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. CUTION e sure the direction-of-flow arrow points in the right direction or else water flow will go unreported. See Figure 3. Preoperation Testing 1. Fill the sprinkler system and check for leaks around the waterflow detector. If it leaks, first check for the proper torque on the U-bolt nuts. If the leak persists, drain the system and remove the detector (refer to Maintenance. page 6). 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 the and 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. Wiring WRNING High Voltage. Electrocution Hazard. Do not handle live C wiring or work on a device to which C power is applied. Doing so may result in injury or death. 1. ll models have two SPDT switches. Switch contacts and are closed when water is flowing and open when it is not. Connect the switches, as shown in Figure 4 on page 5, depending on the application. 2. When connected to a listed sprinkler/fire alarm control panel, the initiating circuit must be nonsilenceable. 3. 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, page If a second conduit entry is required, remove the knockout plug using a flat blade screwdriver as shown on Figure 5, page 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. D I
4 Figure 3. ssembly diagram: Tamper proof wrench (P/N WFDW) Cover Switch enclosure (Replacement P/N ) Delay mechanism (Replacement P/N ) Mounting plate Pipe saddle Conduit entrance Direction-of-flow arrow U-bolt nut Plastic vane Roll paddle opposite of flow arrow while inserting Saddle gasket Pipe Waterflow WFD Size 2" 3-1/2" 4" 8" Hole Size 1-1/4" 2" U-bolt D I
5 Figure 4. WFD wiring: WFD Switch ssembly Top View Switch 1 NOTE: Common and connections will close when vane is deflected, i.e., when water is flowing. Dual switches permit applications to be combined on a single detector. Switch 2 CONTCT RTINGS 125/250 VC 24 VDC 10 MPS 2.5 MPS to nonsilenceable initiating zone of listed FCP WFD WFD end-of-line resistor Typical FCP Connection (Multiple Detectors) to power source compatible with bell Typical Local ell Connection local bell reak wire as shown for supervision of connection. DO NOT allow stripped wire leads to extend beyond switch housing. Do NOT loop wires Figure 5. Ground screw location: Figure 5. Knockout plug removal: GROUND SCREW (GREEN) MOUNTING PLTE D I
6 Mechanical Delay djustment The pneumatic delay is preset at the factory to dial setting 2. To adjust the setting, turn the adjustment dial clockwise to increase the delay, counterclockwise to decrease it. The delay is adjustable from 0 to 70 seconds. See Figure 6. NOTE: Set the delay to the minimum required to prevent false alarms from flow surges. fter extended service, parts of the detector may become worn, reducing the delay time and causing false alarms. If this happens, increase the delay. If the delay is already at the maximum, replace the mechanical delay assembly. Refer to Maintenance for ordering replacement parts. Operational Testing lways notify a central station monitoring waterflow alarms before repairing, maintaining, or testing waterflow alarm devices. 1. Replace the cover and tighten the tamper proof screws with the tamper proof 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. ir pockets in the sprinkler system may increase the apparent delay. Maintenance To prevent accidental water damage, control valves should be shut tight and the system completely drained before waterflow detectors are removed or replaced. Inspect detectors monthly for leaks and replace if a leak occurs. Test detectors at least monthly, as described under Operational Testing, to ensure proper operation. Test more often if required by the authority having jurisdiction. Under normal conditions, System Sensor waterflow detectors should provide years of trouble-free service. However, if the delay mechanism or switch enclosure becomes faulty, replace it. To replace the delay mechanism or switch enclosure, use a phillips head screwdriver to remove the three screws that hold it in place. Either mechanism can be easily replaced without removing the detector from the pipe or draining the pipe. Do not repair or replace any other waterflow detector components. If any other part of the detector does not perform properly, replace the entire detector. Failure to to follow this instruction may result in failure of the detector to report the flow of water. To replace the delay mechanism, request Part No For switch enclosure, request Part No Figure 6. Delay adjustment dial: Delay adjustment dial NUMER PPROXIMTE TIME 0 ON DIL DELY Table of dial settings embossed here. See below (SECONDS) Dial setting Seconds (±50%) D I
7 To remove a detector: 1. Drain the pipe. 2. Turn off electrical power to the detector and disconnect the wiring. 3. Loosen the nuts and remove the U-bolts. 4. Gently lift the saddle far enough to get your fingers under it. Then, roll the vane so it will fit through the hole while continuing to lift the waterflow detector saddle. 5. Lift the detector clear of the pipe. CUTION If a vane breaks in a pipe, find and remove it. If it is not removed, the vane may restrict the flow of water to all or part of the sprinkler system. D I
8 1. Waterflow 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, following the instructions in Chapter 5 of NFP Standard larms generated by the activation of waterflow 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 waterflow detectors have a normal service life WRNING The Limitations of Waterflow larm Devices of years. Hard water systems, however, may reduce waterflow detector service life to 4 or 5 years. 4. Waterflow detectors are not a substitute for insurance. uilding 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 waterflow detectors will not work. ll 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. System Sensor warrants its enclosed waterflow detector to be free from defects in materials and workmanship under normal use and service for a period of three years from date of manufacture. System Sensor makes no other express warranty for this waterflow detector. No agent, representative, dealer, or employee of the Company has the authority to increase or alter the obligations or limitations of this Warranty. The Company s obligation of this Warranty shall be limited to the repair or replacement of any part of the waterflow detector which is found to be defective in materials or workmanship under normal use and service during the three year period commencing with the date of manufacture. fter phoning System Sensor s toll free number 800-SENSOR2 ( ) for a Return uthorization number, send defective units postage prepaid to: System Sensor, Three-Year Limited Warranty Repair Department, R #, 3825 Ohio venue, St. Charles, IL Please include a note describing the malfunction and suspected cause of failure. The Company shall not be obligated to repair or replace units which are found to be defective because of damage, unreasonable use, modifications, or alterations occurring after the date of manufacture. In no case shall the Company be liable for any consequential or incidental damages for breach of this or any other Warranty, expressed or implied whatsoever, even if the loss or damage is caused by the Company s negligence or fault. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This Warranty gives you specific legal rights, and you may also have other rights which vary from state to state. D I System Sensor 1996
9 INSTLLTION ND MINTENNCE INSTRUCTIONS WFDT/WFDTH Vane-type Waterflow Detectors Division of Pittway 3825 Ohio venue, St. Charles, Illinois SENSOR2, FX: Specifications Contact Ratings: Two sets of SPDT (Form C) 125/250 VC; 24 VDC Triggering Threshold andwidth (Flow Rate): 4-10 GPM Service Pressure Rating: 250 PSI (Max.) Overall Dimensions, Installed: WFDT 4 5 /16 H 3 3 /4 W 6 3 /4 D WFDTH 4 5 /16 H 3 9 /16 W 6 3 /4 D Operating Temperature Ranges: 32 F F (0 C - 49 C) Shipping Weight: 2.6 lbs. The WFDT is U.L. listed for indoor and outdoor installations The WFDTH is U.L. listed for indoor use only. The WFDTH can be installed between 2 4 stud wall construction. Important Please Read Carefully nd Save This instruction manual contains important information about the installation and operation of waterflow detectors. Purchasers who install waterflow detectors for use by others must leave this manual or a copy of it with the user. Read all instructions carefully before beginning. CUTION Use vane-type waterflow detectors in wet-pipe systems only. DO NOT USE IN DRY-PIPE, DELUGE, OR PRE-C- TION SYSTEMS. The sudden inrush of water in such systems may break the vane off or damage the mechanism. Do not use in potentially explosive atmospheres. Do not leave unused wires exposed. pproximate Tee Depth Requirements (See Figure 1) Tee Depth Threaded Sweat Poly CPVC /4 1 1 / /2 1 1 / " Figure 1. Mounting dimensions: /8 1 3 /4 N/ 2 1 /4 2 1 /2 2 1 /6 N/ N/ 2 3 /4 2 1 /4 2 1 /2 N/ N/ 2 3 /4 N/ N/ 3 3 /4 (WFDT) 3 9 /16 (WFDTH) Principles Of Operation Vane-type waterflow detectors mount to water filled pipes in sprinkler systems. Water flow in the pipe deflects a vane. Deflection of the vane produces a switched output, usually after a specified delay. Tee dapter Tee Depth Refer to Tee Depth Table 4 5 /16 Gage (End of Paddle Tree) Must Fit etween Top of Tee and ottom of Flange Tee Fitting ll WFDTs have a pneumatically controlled mechanical delay mechanism. Delays are noncumulative; they reset if the flow of water stops before the entire delay has elapsed. ll 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. Compatible Pipe Tees The WFDT and WFDTH fit 1 to 1 1 /2 NPT threaded ferrous and brass, 1 to 2 sweat brass, 1 1 /2 polybutylene plastic and 1 pvc plastic tees having a 1 threaded NPT branch (see Figure 1 and chart for recommended tee depths). Plastic Vane Installation Guidelines efore installing any waterflow alarm device, be thoroughly familiar with: NFP 72: National Fire larm Code NFP 13: Installation of Sprinkler Systems NFP 25: Inspection, Testing, and Maintenance of Water-based Fire Protection Systems NFP 13D: Standard for 1 and 2 Family Dwellings and Manufactured Homes NFP 13R: Standard for Multi-family Dwellings N I
10 Figure 2. ssembly diagram: DELY MECHNISM (REPLCEMENT P/N ) WTERFLOW FLOW FILLISTER HED SCREW 1 NPT THRED CTUTOR LEVER (Cover tamper option is available.) COVER SWITCH ENCLOSURE (REPLCEMENT P/N ) GROUND SCREW (GREEN) MOUNTING PLTE TMPER PROOF WRENCH (P/N WFDW) PDDLE (PDDLE REPLCEMENT KIT (P/N PRK9) lso, follow other applicable NFP 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 waterflow condition. System Sensor is not responsible for devices that have been improperly installed, tested or maintained. 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 to protect from damage, 6-7 feet above the floor. 3. On horizontal runs, position the detector on top of the pipe or on the side of it. 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 where upflow conditions exist. Failure to do so may prevent unit from operating properly. 4. Mount detector at least 6 inches from a fitting which changes the direction of the water flow, or no closer than 24 inches from a valve or drain. 5. E SURE DIRECTION-OF-FLOW RROW MTCHES C- TUL DIRECTION OF FLOW IN THE PIPE. Mounting Instructions 1. The WFDT and WFDTH waterflow detectors are designed to fit only the appropriate tee fitting. 2. WFDT and WFDTH units are shipped without paddles mounted to the actuator. Select the correct size paddle for the type of tee being used. lign hole on stem of paddle with hole on actuator lever. Fasten together using a #4-40 x 1/4" fillister head screw supplied in bag assembly. See Figure 2. Use only the screw provided with the unit. Drive screw head through hole in paddle until it seats to actuator lever surface. No washer is required. For paddle replacement refer to Maintenance section. 3. Carefully roll the vane opposite the direction of flow and insert through tee. 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 tee) 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. gap between gage and tee adapter is acceptable. When correctly installed, the detector must face in the proper direction of waterflow and be aligned with the pipe. 4. Remove the metal cover. Move the actuator lever back and forth to check for binding. If the vane binds, remove the detector and correct the problem before proceeding. CUTION e sure the direction-of-flow arrow points in the right direction, otherwise a waterflow condition will go unreported. See Figure 2. Preoperation Testing 1. Fill the sprinkler system with water and check for leaks around the WFDT or WFDTH. If there is a leak, 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 the detector and check again for leaks. Do not proceed until all leaks have been stopped. 2. Connect an ohmmeter or continuity tester across ( and ) terminal switch contacts. The ohmmeter should show an open circuit, no continuity. 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. NOTE: Leg of tee perpendicular to flow of water must have a 1" 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 waterflow condition. N I
11 Figure 3. Field wiring: Top View Switch 1 NOTE: Common and connections will close when vane is deflected, i.e., when water is flowing. Dual switches permit applications to be combined on a single detector. WFDTH WFDT Switch 2 WFDTH WFDT CONTCT RTINGS 125/250 VC 24 VDC 10 MPS 2.5 MPS to nonsilenceable initiating zone of listed FCP end-of-line resistor Typical FCP Connection Field Wiring to power source compatible with bell Typical Local ell Connection local bell WFDT and WFDTH switch assembly reak wire as shown for supervision of connection. DO NOT allow stripped wire leads to extend beyond switch housing. DO NOT loop wires WRNING High Voltage. Electrocution Hazard. Do not handle live C wiring or work on a device to which C power is applied. Doing so may result in severe injury or death. 1. The WFDT and WFDTH have two SPDT switches. Switch contacts ( and ) are closed when water is flowing and open when water is not flowing. Connect the switches as shown in Figure 3 depending on the application. 2. When connected to a listed sprinkler/fire alarm control panel, the initiating circuit must be non-silenceable. 3. ground screw is provided with all units. When grounding is required, clamp wire with screw in hole located between conduit entrance holes. See Figure 2. fter extended service, parts of the detector may become worn reducing the delay time and causing false alarms. If this happens, increase the delay. If the delay is already at maximum, replace the mechanical delay assembly. Refer to Maintenance section for ordering replacement parts. Figure 4. Delay adjustment dial: Table of dial settings embossed here. See below Mechanical Delay djustment The pneumatic delay is preset at dial setting 2 at the factory. To adjust the delay, turn the adjustment dial on the delay mechanism. Turn clockwise to increase the delay, counterclockwise to decrease the delay. Delay can be adjusted over a range from 0-70 seconds. See Figure 4. Delay adjustment dial 2 3 NOTE: Set the delay to the minimum required to prevent false alarms due to flow surges. Dial setting Seconds (±50%) N I
12 Operational Testing lways notify a central station monitoring waterflow alarms before repairing, maintaining or testing waterflow alarm devices. 1. Replace the cover and tighten the security screws with the tamper proof 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. ir pockets in the sprinkler system may increase the apparent time delay. Maintenance To prevent accidental water damage, control valves should be shut tightly and the system completely drained before waterflow detectors are removed or replaced. Inspect detectors monthly for leaks. Test detectors at least monthly as described under Operational Testing above to insure proper operation. This device is not designed for use on dry pipe systems. Test more often if required by the authority having jurisdiction. Under normal conditions System Sensor waterflow detectors should provide years of trouble-free service. If, however, the delay mechanism becomes faulty, replacement kits are available. To replace the delay mechanism, request Part No ; for switch enclosure, request Part No Complete instructions are enclosed with each. Either mechanism can be easily replaced without removing the detector from the pipe or draining the pipe. If damage occurs to paddle, order replacement kit PRK9. Refer to procedure below for removal of detector on pipe. Do not repair or replace any other waterflow 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 waterflow condition. Proceed as follows to remove a detector. 1. Drain the pipe. 2. Turn off electrical power to the detector, and then disconnect wiring. 3. Unscrew WFDT or WFDTH from tee fitting. 4. Lift detector clear of pipe. CUTION If a vane breaks off in a pipe, find and remove it. Failure to do so may restrict the proper flow of water to part of the sprinkler system. 1. Waterflow 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, following the instructions in NFP Standard larms generated by the activation of waterflow 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. System Sensor warrants its enclosed waterflow detector to be free from defects in materials and workmanship under normal use and service for a period of three years from date of manufacture. System Sensor makes no other express warranty for this waterflow detector. No agent, representative, dealer, or employee of the Company has the authority to increase or alter the obligations or limitations of this Warranty. The Company s obligation of this Warranty shall be limited to the repair or replacement of any part of the waterflow detector which is found to be defective in materials or workmanship under normal use and service during the three year period commencing with the date of manufacture. fter phoning System Sensor s toll free number 800-SENSOR2 ( ) for a Return uthorization number, send defective units postage prepaid to: System Sensor, WRNING The Limitations of Waterflow larm Devices Three-Year Limited Warranty 3. Vane-type waterflow detectors have a normal service life of years. Hard water systems, however, may reduce waterflow detector service life to 4 or 5 years. 4. If valves controlling the water supply to a sprinkler system are closed, vane-type waterflow detectors will not work. ll 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. Repair Department, R #, 3825 Ohio venue, St. Charles, IL Please include a note describing the malfunction and suspected cause of failure. The Company shall not be obligated to repair or replace units which are found to be defective because of damage, unreasonable use, modifications, or alterations occurring after the date of manufacture. In no case shall the Company be liable for any consequential or incidental damages for breach of this or any other Warranty, expressed or implied whatsoever, even if the loss or damage is caused by the Company s negligence or fault. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This Warranty gives you specific legal rights, and you may also have other rights which vary from state to state. N I System Sensor 1996
13 INSTLLTION ND MINTENNCE INSTRUCTIONS WFDTNR Vane-type Waterflow Detector Division of Pittway 3825 Ohio venue, St. Charles, Illinois SENSOR2, FX: Specifications Contact Ratings: 125/250 VC 24 VDC Triggering Threshold andwidth (Flow Rate): 4-10 GPM Static Pressure Rating: 250 PSI (Max.) Overall Dimensions, Installed: 3.25" x 4.25" cover dia. 3.25" above pipe tee Operating Temperature Range: 32 F F (0 C - 49 C) Shipping Weight: 1.5 lbs. Important Please Read Carefully nd Save This instruction manual contains important information about the installation and operation of waterflow detectors. Purchasers who install waterflow detectors for use by others must leave this manual or a copy of it with the user. Read all instructions carefully before beginning. pproximate Tee Depth Requirements (See Figure 1) Tee Depth Threaded Sweat Poly CPVC /4 1 1 / /2 1 1 / " 2 1 /8 1 3 /4 N/ 2 1 /4 2 1 /2 2 1 /6 N/ N/ 2 3 /4 2 1 /4 2 1 /2 N/ N/ 2 3 /4 N/ N/ CUTION Use vane-type waterflow detectors in wet-pipe systems only. DO NOT USE IN DRY-PIPE, DELUGE, OR PRE-C- TION SYSTEMS. The sudden inrush of water in such systems may break the vane off or damage the mechanism. Do not use in potentially explosive atmospheres. Do not leave unused wires exposed. Figure 1. Mounting dimensions: 3 1/4" 1 3/4" 3 1/4" HEX TEE DPTOR Principles Of Operation Vane-type waterflow detectors mount to wet-pipe systems only. Water flow in the pipe deflects a vane. Deflection of the vane produces a switched output. ll 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. "TEE DEPTH" REFER TO TEE DEPTH TLE PIPE TEE FITTING PLSTIC VNE INSTLLTION GGE (END OF PDDLE TREE) MUST FIT ETWEEN TOP OF TEE ND OTTOM OF HEX TEE DPTOR FLNGE Compatible Pipe Tees Model WFDTNR fits 1" 1 1 /2" NPT threaded ferrous and brass, 1" - 2" sweat brass, 1 1 /2" polybutylene plastic and 1" pvc plastic tees having a 1" threaded NPT branch (see Figure 1 and chart for recommended tee depths). Installation Guidelines efore installing any waterflow alarm device, be thoroughly familiar with: NFP 72: Installation, Maintenance and Use of Local Protective Signalling Systems NFP 13: Installation of Sprinkler Systems, specifically Section 3.17 NFP 25: Inspection, Testing and Maintenance of Sprinkler Systems, specifically Chapters 4 and 5 NFP 13D: Standard for Residential Dwellings NFP 13R: Standard for Multifamily Dwellings Other applicable NFP 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 waterflow condition. System Sensor is N I
14 Figure 2. ssembly diagram: CTUTOR LEVER FLOW CTUTOR SSEMLY WTER FLOW FILLISTER HED SCREW COVER GROUND SCREW (GREEN) 1" NPT THRED MOUNTING PLTE PDDLE TMPER PROOF WRENCH (P/N WFDW) not responsible for devices that have been improperly installed, tested or maintained. 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 to protect from damage, 6-7 feet above the floor. 3. On horizontal runs, position the detector on top of the pipe or on the side. Do not mount it upside down. 4. Mount detector at least 6 inches from a fitting which changes the direction of the water flow. 5. E SURE DIRECTION-OF-FLOW RROW MTCHES C- TUL DIRECTION OF FLOW IN THE PIPE. Mounting Instructions 1. This WFDTNR waterflow detector is designed to fit only the appropriate tee fitting. NOTE: Leg of tee perpendicular to flow of water must have a 1" 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 waterflow 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). lign hole on stem of paddle with hole on actuator lever. Fasten together using a #4-40 x 1 / 4 " fillister head screw supplied in bag assembly. See Figure 2. Use only the screw provided with the WFDTNR. 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 tee) 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. gap between gage and tee adapter is acceptable. When correctly installed, the detector must face in the proper direction of waterflow and be aligned with the pipe. 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. CUTION e sure the direction-of-flow arrow points in the correct direction, otherwise a waterflow condition will go unreported. See Figure 2. Operational Testing lways notify a central station monitoring waterflow alarms before repairing, maintaining, or testing waterflow alarm devices. 1. Fill the sprinkler and check for leaks around the WFDTNR. 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 ( and ) 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. ir 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 WFDT has two SPDT switches. Switch contacts ( and ) are closed when water is flowing and open when water is not flowing. Connect the switches as shown in Figure 3 depending on the application. 2. When connected to a listed sprinkler/fire alarm control panel, the initiating circuit must be non-silenceable. N I
15 Figure 3. Field wiring: Switch 1 NOTE: Common and connections will close when vane is deflected, i.e., when water is flowing. Dual switches permit applications to be combined on a single detector. Strip Gauge Switch 2 CONTCT RTINGS 125/250 VC 24 VDC 10 MPS 2.5 MPS WFDTNR WFDTNR to nonsilenceable initiating zone of listed FCP end-of-line resistor Typical FCP Connection to power source compatible with bell Typical Local ell Connection local bell reak wire as shown for supervision of connection. DO NOT allow stripped wire leads to extend beyond switch housing. DO NOT loop wires. 3. ground screw is provided with all WFDT units. When grounding is required, clamp wire with screw in hole located between conduit entrance holes. See Figure 2. WRNING High Voltage. Electrocution Hazard. Do not handle live C wiring or work on a device to which C power is applied. Doing so may result in severe injury or death. Maintenance To prevent accidental water damage, control valves should be shut tightly and the system completely drained before waterflow detectors are removed or replaced. Inspect detectors monthly for leaks. Test detectors at least monthly as described under Operational Testing to insure proper operation. This device is not designed for use on dry pipe systems. Test more often if required by the authority having jurisdiction. Under normal conditions System Sensor waterflow detectors should provide years of trouble-free service. If, however, the switch enclosure becomes faulty, request Part No If damage occurs to paddle, order replacement kit PRK9. Refer to procedure below for removal of detector on pipe. Do not repair or replace any other waterflow 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 waterflow condition. Proceed as follows to remove a detector: 1. Drain the pipe 2. Turn off electrical power to the detector, and then disconnect wiring 3. Unscrew WFDTNR from tee fitting N I
16 1. Waterflow 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, following the instructions in Chapter 5 of NFP Standard larms generated by the activation of waterflow 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 waterflow detectors have a normal service life WRNING The Limitations of Waterflow larm Devices of years. Hard water systems, however, may reduce waterflow detector service life to 4 or 5 years. 4. Waterflow detectors are not a substitute for insurance. uilding 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 waterflow detectors will not work. ll 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. System Sensor warrants its enclosed waterflow detector to be free from defects in materials and workmanship under normal use and service for a period of three years from date of manufacture. System Sensor makes no other express warranty for this waterflow detector. No agent, representative, dealer, or employee of the Company has the authority to increase or alter the obligations or limitations of this Warranty. The Company s obligation of this Warranty shall be limited to the repair or replacement of any part of the waterflow detector which is found to be defective in materials or workmanship under normal use and service during the three year period commencing with the date of manufacture. fter phoning System Sensor s toll free number 800-SENSOR2 ( ) for a Return uthorization number, send defective units postage prepaid to: System Sensor, Three-Year Limited Warranty Repair Department, R #, 3825 Ohio venue, St. Charles, IL Please include a note describing the malfunction and suspected cause of failure. The Company shall not be obligated to repair or replace units which are found to be defective because of damage, unreasonable use, modifications, or alterations occurring after the date of manufacture. In no case shall the Company be liable for any consequential or incidental damages for breach of this or any other Warranty, expressed or implied whatsoever, even if the loss or damage is caused by the Company s negligence or fault. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This Warranty gives you specific legal rights, and you may also have other rights which vary from state to state. N I System Sensor 1996
17 INSTLLTION ND MINTENNCE INSTRUCTIONS OSY2 Gate Valve Supervisory Switch Division of Pittway 3825 Ohio venue, St. Charles, Illinois SENSOR2, FX: Specifications Contact Ratings: Dimensions: Maximum Stem Extension: 2 5 /8" Minimum Stem Extension: 5 /8" racket Span: 6 3 /4" 125/250 VC 24 VDC 5 3 /4"H X 3 1 /2"W X 3 1 /4"L Operating Temperature Range: F (0-49 C) Shipping Weight: 2 3 /4 lb. Important Please Read Carefully nd Save This manual contains important information about the installation and operation of supervisory switches. These instructions apply to System Sensor switches for outside screw and yoke valves only. Read all instructions carefully before beginning installation. Figure 1: WRNING Do NOT use this switch in explosive or potentially explosive atmospheres. Do NOT leave unused wires exposed. ll supervisory switch installations must comply with local codes and ordinances and the requirements of the authority having jurisdiction. dditional information is available in National Fire Protection ssociation standards NFP 13, 13D, 13R, 71, and 72. General Installation Considerations The OSY2 Supervisory Switch can be mounted on open yoke valves between 1 /2" and 12" in diameter in the positions shown in Figure 1 only. If the switch is installed with the actuator pointing upward, water may leak into the interior of the switch. Therefore, do NOT install the OSY2 with its actuating lever pointing upward. ll OSY2 models are equipped with a ground screw inside the switch housing near the conduit exit hole for those applications where grounding is required. Narrow Yoke Valves s Figure 2 suggests, installing the valve with mounting bolts inside the yoke is recommended. However, some valves may have yokes that are too narrow for this arrange- CTUTOR VERTICL (DOWN) CTUTOR HORIZONTL ment. If this is the case, the bolts can be positioned on the outside of the yoke. Limited Clearance Valves The OSY2 mounting bracket fits most of the open yoke valves used in fire protection systems. However, some of these valves, especially those less than 1 1 /2" in diameter, have irregularly shaped yokes or such limited clearances that the clamping bar cannot be installed properly and/or it causes the valve to bind. If this is the case, the use of the supplied J-bolts is required to attach the OSY2 to the valve (see J-olt Detail, Figure 2). Installation Procedure See Figures 2 and 3, as required, while performing the procedure that follows. Perform step 1 on valves 1 1 /2" in diameter and smaller only. Proceed directly to step 2 if the switch is being installed on a valve larger than 1 1 /2" in diameter. 1. Remove and discard the two C-clips and roller from the actuating lever. 2. Set the valve to its fully open position. Remove the OSY2 Supervisory Switch from the carton and adjust the position of the retaining washers to provide sufficient bolt length for the yoke thickness of the valve. N I
18 Figure 2: Wrench for tamper-resistant screws (P/N WFDW) Cover Tamper-resistant screws ctuating Cam Spring ctuating lever set screw Mounting screws Terminal block Seal ase housing Mounting racket "C" clip ctuating lever roller (2 thru 12"only) Valve Stem Carriage olt Yoke Clamping ar J-olt Detail Hex wrench (P/N HEXW) SLIDE CLMPING R TO REMOVE OR INSTLL. Retaining Washer Nut NOTE: LRGER GTE SHOWN (2" THRU 12"). WHEN INSTLLING SUPERVISORY SWITCH TO SMLLER GTE S (1/2" THRU 1 1/2") CRRIGE OLTS RE TO E LOCTED ON OUTORD SIDE OF YOKE. ON SMLL S WITH LIMITED CLERNCE THE USE OF J-OLTS MY E REQUIRED. N I
19 Figure 3: STEM GLND THREDED STEM HEX YOKE CLMPING R NOT SHOWN GROOVE GLND HEX NUT OR OLT Position the switch on the valve with the bolts on the inside (preferably) or outside of the yoke, depending on clearances. djust the position of the OSY2 as far as possible from the valve gland and in a location where the actuating lever contacts the unthreaded section of the valve stem (if the valve stem is already grooved, proceed directly to step 6). 3. When the switch is in position on the valve, slide the open end of the clamping bar onto the bolts and under the retaining washers. If necessary, adjust the length of the actuating lever by loosening the set screw on the cam, sliding the lever in or out, as appropriate, and retightening the set screw. The lever is properly adjusted when it clears the clamping bar. Tighten the nuts by hand and slide the OSY2 until the second switch trip points are found as the lever rests on the valve stem. This approximates the final position of the OSY2 after the valve stem is grooved. Carefully check all clearances of the bolts, actuator, mounting bracket, clamping bar, and OSY2 cover. djust the position as necessary. If clearance is a problem, refer to the Limited Clearance Valves (page 1) section of this manual. 4. Mark the point on the valve stem where the actuating lever contacts the valve stem. 5. Remove the OSY2 by loosening the nuts and sliding the clamping bar from beneath the retaining washers. Remove the OSY2 from the valve and set it aside. (a) Valves 1 1 /2" in diameter and smaller only. Use a 1 /4" untapered round file to file a groove 3 /32" deep in the valve stem at the mark that was made in step 4. e sure to remove any burrs resulting from the filing to avoid damaging the valve stem packing gland. (b) Valves larger than 1 1 /2" inches in diameter only. Use a 3 /8" untapered round file to file a groove 1 /8" deep in the valve stem at the mark that was made in step 4. e sure to remove any burrs resulting from the filing to avoid damaging the valve stem packing gland. 6. Mount the switch loosely with the actuating lever centered in the groove. When the switch is in position on the valve, slide the open end of the clamping bar onto the bolts and under the retaining washers, as indicated in Figure Ensure that the actuating lever does not hit the inside of the cover or the clamping bar at any point in its travel. If it does, adjust the length of the lever by loosening the set screw, sliding the lever in or out, as needed, and retightening the set screw. 8. djust the supervisory switch position on the valve so that both switches are depressed ( to circuit open) when the actuating lever is in the groove with the valve in the full open position. The to circuit should close when the valve is closed 1 /5 of its travel or 2 full turns of the handle, whichever is less. The switch produces an audible click when it closes. The switch closure can also be tested electrically by using an ohmmeter to test for continuity between its terminals. 9. Tighten the nuts securely with a wrench and check the operation of the OSY2 as in step 8. If necessary, reposition the OSY2 and test it again. 10. Wire the supervisory switch as shown in Figure Replace the OSY2 cover and tighten the tamper-resistant cover screws with the special wrench provided. Store this wrench in a secure location. 12. Test the operation of the OSY2 by closing the valve the 1 /5 of its travel distance or two full turns, whichever is less. The circuit between and should indicate a closure during this procedure. If it does not, readjust the supervisory switch and actuator positions until the switch closes when the valve is operated. Testing Test the operation of all supervisory switches before they are placed into service and at least semiannually, or as required by the authority having jurisdiction. NOTE: Notify the proper authorities that the supervisory switch(es) is (are) undergoing maintenance and, therefore, will be temporarily out of service. Disable the system or zone undergoing testing to prevent unwanted alarms. Test the operation of the OSY2 by closing the valve the 1 /5 of its total travel distance or two full turns, whichever is less. contact closure must occur during this procedure. If it does not, readjust the supervisory switch and actuator positions until the switch closes when the valve operated. N I
20 Figure 4. Supervisory switch wiring diagram: Switch 1 Top View Strip Gage Switch 2 CONTCT RTINGS 125/250 VC 24 VDC 10 MPS 2.5 MPS Sup. Switch Sup. Switch to nonsilenceable initiating zone of listed FCP end-of-line resistor Typical FCP Connection to power source compatible with bell local bell reak wire as shown for supervision of connection. DO NOT allow stripped wire leads to extend beyond switch housing. DO NOT loop wires. Typical Local ell Connection larms generated by the actuation of the activating lever may not be received by a central station if telephone or other communication lines to the detector are out of service, disabled, or open. 2. Supervisory switch alarm devices have a normal service life of years. WRNING The Limitations of Supervisory Switch larm Devices 3. Supervisory switches are not a substitute for insurance. uilding owners should always insure property and lives being protected. System Sensor warrants its enclosed supervisory switch to be free from defects in materials and workmanship under normal use and service for a period of three years from date of manufacture. System Sensor makes no other express warranty for this supervisory switch. No agent, representative, dealer, or employee of the Company has the authority to increase or alter the obligations or limitations of this Warranty. The Company s obligation of this Warranty shall be limited to the repair or replacement of any part of the supervisory switch which is found to be defective in materials or workmanship under normal use and service during the three year period commencing with the date of manufacture. fter phoning System Sensor s toll free number 800-SENSOR2 ( ) for a Return uthorization number, send defective units postage prepaid to: System Sensor, Three-Year Limited Warranty Repair Department, R #, 3825 Ohio venue, St. Charles, IL Please include a note describing the malfunction and suspected cause of failure. The Company shall not be obligated to repair or replace units which are found to be defective because of damage, unreasonable use, modifications, or alterations occurring after the date of manufacture. In no case shall the Company be liable for any consequential or incidental damages for breach of this or any other Warranty, expressed or implied whatsoever, even if the loss or damage is caused by the Company s negligence or fault. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This Warranty gives you specific legal rights, and you may also have other rights which vary from state to state. N I System Sensor 1996
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