INSTALLATION AND MAINTENANCE INSTRUCTIONS AFDT/AFDTH Accuflow™ 3825 Ohio Avenue, St. Charles, Illinois 60174 1-800-SENSOR2, FAX: 630-377-6495 www.systemsensor.com Vane-type Waterflow Detectors with Solid State Retard Specifications Contact Ratings: 0.6 A @ 125 VAC; 2 A @ 30 VDC Triggering Threshold Bandwidth (Flow Rate): 4–10 GPM Static Pressure Rating: 250 PSI (Max.) Dimensions, Installed: AFDT– 45⁄16″H × 33⁄4″W × 63⁄4″D AFDTH– 45⁄16″H × 39⁄16″W × 63⁄4″D Operating Temperature Range: 32°F - 120°F (0°C - 49°C) Shipping Weight: 2.6 lbs. Enclosure Rating: AFDT– NEMA Type 4, as tested by Underwriters Laboratories, Inc. (U.L.) AFDTH– Indoor use only, as tested by U.L. Voltage Range: 8.4–35 V (DC–FWR); 108–132 VAC Power Requirements: 300 µA at 12 or 24 V (DC–FWR); 400 µA at 120 VAC U.S. Patent Number: 3,845,259; 6,084,521; 6,275,160 The AFDTH can be installed between 2X4 stud wall construction. Panel Compatibility: The AFD waterflow indicators may receive power and operate on a two-wire initiating zone of a fire alarm control panel. When determining compatibility of these devices, the standby operating voltage of the control panel must be between 8.5 and 35 volts. In the standby mode, the AFD draws a maximum current of 0.3 mA. In alarm, the AFD acts as a short across the initiating zone (similar to a manual fire box). For two wire conventional fire alarm control panels, not more than 5 waterflow indicators may be connected to a single initiating zone. The maximum retard/reset time of the waterflow indicator plus the initiating zone shall not exceed 90 seconds. For two wire addressable control panels, the number of waterflow indicators connected to the panel’s signaling line circuit shall be limited only by the circuit’s current capacity. Important Please Read Carefully And 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. Approximate Tee Depth Requirements (See Figure 1) CPVC/Spears/ Victaulic Tee Depth Threaded Sweat Poly B CPVC CPVC/Central 1 × 1 × 1″ 21/8″ 13/4″ N/A 21/4″ 215/32″ 213/16″ 11/4 × 11/4 × 1″ 21/2″ N/A N/A 21/6″ N/A N/A 11/2 × 11/2 × 1″ 23/4″ 21/4″ 21/2″ N/A N/A N/A 2 × 2 × 1" 23/4″ N/A N/A 31/4″ N/A N/A Figure 1. Mounting dimensions: CAUTION 33/4 (AFDT) Use vane-type waterflow detectors in wet-pipe systems only. DO NOT USE IN DRY-PIPE, DELUGE, OR PRE-ACTION 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. 39/16 (AFDTH) 3 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. All AFDTs have a controlled delay mechanism. Delays are noncumulative; they reset if the flow of water stops before the entire delay has elapsed. 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. 45/16 Tee Adapter Tee Depth Refer to Tee Depth Table Tee Fitting Plastic Vane Compatible Pipe Tees/Risers The AFDT and AFDTH fit 1″ to 11⁄2″ NPT threaded ferrous and brass, 1″ to 2″ sweat brass, 11⁄2″ polybutylene plastic and 1″ cpvc plastic tees having a 1″ threaded NPT branch (see Figure 1 and chart for recommended tee depths). For 2″ cast and malleable threaded tees use 2″ paddle ( P02-0023-000) provided. D770-34-00 Gage (End of Paddle Tree) Must Fit Between Top of Tee and Bottom of Flange A78-1939-01 Installation Guidelines Before installing any waterflow alarm device, be thoroughly familiar with: NFPA 72: National Fire Alarm Code NFPA 13: Installation of Sprinkler Systems NFPA 13D: Standard for 1 and 2 Family Dwellings and Manufactured Homes NFPA 13R: Standard for Residential Occupancies up to and including Four Stories in Height NFPA 25: Inspection, Testing, and Maintenance of Waterbased Fire Protection Systems 1 I56-1621-004R Also, follow other applicable NFPA standards, local codes and the requirements of the authority having jurisdiction. 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 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. 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 sprinkler system is activated by a fire. 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. Be sure the direction-of-flow arrow points in the right direction, otherwise a waterflow condition will go unreported. See Figure 2. Figure 2. Assembly diagram: Preoperation Fill the sprinkler system with water and check for leaks around the AFDT or AFDTH. 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. COVER TAMPER PROOF WRENCH (P/N WFDW) DIP SWITCH Wiring GROUND SCREW (GREEN) GASKET (AFDT ONLY) WARNING MOUNTING PLATE 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 injury or death. FLOW FILLISTER HEAD SCREW 1″ NPT THREAD ACTUATOR LEVER PADDLE (PADDLE REPLACEMENT KIT P/N PRK9) 1. All models have two wires and two sets of terminals. Relay Wires (W1 & W2 designated on PCB): These wires are connected to a latching normally open (as in No Flow) relay contact. They are isolated from all electronics. They will close and cause a short when water flows and the retard time elapses. They will remain shorted until waterflow stops. Once waterflow stops, these contacts will re-open. Power Terminals (T2 designated on PCB): This is a TWO screw terminal block. The Accuflow gets its power from these terminals. These terminals must have voltage present from the FACP or other suitable source of power before anything will work. If no power is present, the Accuflow will not provide proper alarm signals. These terminals will accept power in any polarity as well as AC-line power. Aux Relay Terminals (T1 designated on PCB): This is a THREE screw terminal block. These terminals are connected to a latching Form C relay. In no flow conditions, COM is connected to A. When flow is detected COM will disconnect from A and connect to B. This relay will latch in that state and reset after water stops flowing. See Figures 3 - 8 for specific wiring instructions. 2. Adjust Dip Switch to desired time delay. See Figure 11. For Dip Switch location, see Figure 2. 3. When connected to a listed sprinkler/fire alarm control panel, the initiating circuit must be nonsilenceable. 4. 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 9, page 4. 5. If a second conduit entry is required, remove the knockout plug using a flat blade screwdriver as shown on Figure 10, page 4. 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. WATERFLOW A78-2134-05 2. Locate the detector 6 to 7 feet above the floor to protect from potential damage. 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. BE SURE DIRECTION-OF-FLOW ARROW MATCHES ACTUAL DIRECTION OF FLOW IN THE PIPE. Mounting Instructions 1. The AFDT and AFDTH waterflow detectors are 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. AFDT and AFDTH units are shipped without paddles mounted to the actuator. Select the correct size paddle for the type of tee being used. Align 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 D770-34-00 NOTE: 2 Power terminals must be connected to FACP or other non-silenceable initiating circuit. I56-1621-004R Figure 3. Wiring AFD to bell: AUX RELAY TERMINALS Figure 6. Wiring the AFD to a panel: Leave the Relay wires installed under the Power Terminals and connect the panel initiating loop wires as shown below. POWER TERMINALS AUX RELAY TERMINALS A B CO POWER TERMINALS M BELL A BELL BC RELAY WIRES OM POWER SOURCE EOL OR NEXT DEVICE FACP Figure 4. (4 Wire Addressable) Wiring the AFD to an addressable panel using an auxiliary power supply for power: Remove the Relay Wires from under the Power Terminals. Connect these wires to the Addressable Module. AFD ENCLOSURE Figure 7. Wiring the AFD to a panel and other device: Leave the Relay Wires installed under the Power Terminals and connect the panel initiating loop wires as shown below. The AFD requires power to operate, therefore connect the FACP initiating loop wires to the Power Terminals and Relay Wires as shown. AFD ENCLOSURE AUX RELAY TERMINALS AUX RELAY TERMINALS POWER TERMINALS POWER TERMINALS A B RELAY WIRES CO A B AUX RELAY TERMINALS RELAY WIRES POWER TERMINALS CO M M A AUX. POWER OUTPUT B RELAY WIRES CO M EOL OR NEXT DEVICE FACP SLC LOOP MODULE MODULE NOTE: PLACE MODULE EOL RESISTOR ACROSS RELAY WIRES INSIDE AFD COVER. FACP EOL POWER SUPERVISION RELAY (SHOWN ENERGIZED) A77-716 12/24V BELL NOTE: PLACE MODULE EOL RESISTOR ACROSS RELAY WIRES INSIDE AFD COVER. POWER SOURCE Figure 5. Wiring the AFD using 4 wires. (Aux. Power from Panel): Remove the Relay Wires from the Power Terminals. Cut off the spade lugs from the ends of the Relay Wires. Put wire nuts over ends of Relay Wires as shown. Use Aux. Relay Terminals to make connection to panel and next device as shown.. Figure 8. (2 Wire Addressable) Wiring the AFD to an addressable panel using the SLC loop wires for power: Remove the Relay Wires from under the Power Terminals. Connect these wires to the Addressable Module. NOTE: AUX RELAY TERMINALS POWER TERMINALS A B RELAY WIRES Consult FACP Manufacturer’s Compatibility Guide prior to installation. AUX RELAY TERMINALS CO M AUX. POWER OUTPUT BELL EOL POWER SUPERVISION RELAY (SHOWN ENERGIZED) A77-716 12/24V POWER TERMINALS A RELAY WIRES BC OM FACP INITIATING LOOP NOTE: EOL INTELLIGENT FACP MODULE TO NEXT MODULE OR EOL To comply with NFPA code, never put more than two wires in a wire nut. CAUTION Relay wires and power terminal wiring must be contained within either a common enclosure or enclosures within 20 feet of each other with wiring inside conduit. Break wire as shown for supervision of connection. DO NOT allow stripped wire leads to extend beyond switch housing. Do NOT loop wires. D770-34-00 3 I56-1621-004R Figure 9. Ground screw location: 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. GROUND SCREW (GREEN) Maintenance To prevent accidental water damage, control valves should be shut tightly and the system completely drained before waterflow detectors are removed or replaced. MOUNTING PLATE Figure 10. Knockout plug removal: 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. 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. Figure 11. Solid State Retard Timing Chart: Time (sec) 0 15 30 45 60 75 90 Caution: Switch 1 (60 sec) OFF OFF OFF OFF ON ON ON Only use the above timer settings. Timing settings must not exceed 90 seconds. Switch 2 (30 sec) OFF OFF ON ON OFF OFF ON ON Switch 3 (15 sec) OFF ON OFF ON OFF ON OFF 1 2 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 AFDT or AFDTH from tee fitting. 4. Lift detector clear off the pipe. CAUTION 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. 3 Operational Testing Always 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 Please refer to insert for the Limitations of Fire Alarm Systems WARNING The Limitations of Waterflow Alarm Devices 3. Vane-type waterflow detectors have a normal service life of 10-15 years. Hard water systems, however, may substantially reduce waterflow detector service life. 4. Waterflow 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 waterflow 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. 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 NFPA Standard 25. 2. Alarms 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. Three-Year Limited Warranty Ohio Avenue, St. Charles, IL 60174. 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. 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. After phoning System Sensor’s toll free number 800-SENSOR2 (736-7672) for a Return Authorization number, send defective units postage prepaid to: System Sensor, Repair Department, RA #__________, 3825 D770-34-00 4 I56-1621-004R ©2002 System Sensor