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AccuflowTM Series Low Flow Rate Waterflow Detectors
Models Available LFD20 LFD25-73MM LFD25-76MM LFD30-2 LFD40 Replacement Par ts WFDW 546-9000 WFDN4 Cover wrench Cover tamper switch kit Gasket kit LFD30-2 (cover removed)
LFD30-2
Product Overview For use in wet pipe water mist systems Compatible with 2 to 4 inch stainless steel and brass pipe Solid state retard assures precise timing accuracy Dipswitch selections simplify retard settings Non-polarized, two-wire design allows connection to a local bell and conventional or addressable systems NEMA 4 rated Synchronized switches activate both the alarm panel and local bell simultaneously System Sensor's AccuflowTM Low Flow Rate detectors are a new line of solid state waterflow detectors designed for use in wet pipe water mist systems where low flow detection is required. Robust Construction. Accuflow low flow detectors consist of a rugged enclosure for indoor and outdoor use. Like all System Sensor waterflow detectors, low flow models operate across a wide temperature range, from 32F to 120F (0C to 49C). Reliable Performance. Accuflow low flow detectors are intended for applications where flow detection of 3 GPM or greater is required. By incorporating a solid state retard, proper sensitivity, timing accuracy and switch resetting is assured. False Alarm Immunity. The solid state circuitry of Accuflow low flow detectors provides greater timing accuracy over traditional mechanical retard designs. This accuracy minimizes the risk of false alarms created by pressure surges or air trapped within the sprinkler system. Simplified Operation. Accuflow low flow detectors are designed to simplify installation. Wired like traditional waterflow detectors, these models do not require the installer to run an additional third wire. Two conduit openings permit easy attachment to the local alarm system.
(R)
Engineering Specification Low flow rate vane-type water flow detector with solid state retard shall be an Accuflow model number ____________________ manufactured by System Sensor, and shall be installed on system piping as designated on the drawing and/or as specified herein. Detectors shall mount on a stainless steel clear pipe span of the appropriate nominal size, either on a ver tical upflow of horizontal run, at least 6" from any fittings which may change water direction, flow rate, or pipe diameter, or no closer than 24" from a valve or drain. Detectors shall be compatible with 2" through 4" diameter stainless steel and brass pipe. Detectors shall have a sensitivity of 3 gallons (11.35 liters) per minute minimum and a static pressure of 450 psi for 2" - 4" diameter pipes. The detector shall respond to water flow in the specified direction after a preset time delay. The delay mechanism shall be a solid state unit which is field-adjustable via a dipswitch. The detector's actuation mechanism shall include a polyethylene vane inser ted through a hole in the pipe and connected by a mechanical linkage to the delay mechanism. Outputs shall consist of one SPDT switch (Form C contact) and one SPST switch (normally open contact) for wiring to an alarm panel or addressable control module and local bell and/or notification device. Two conduit entrances (one knockout type) for standard fittings of commonly used electrical conduit shall be provided on the detectors. A grounding provision shall be provided. Unless noted, enclosures shall be NEMA 4 listed by Under writers Laboratories, Inc. for indoor or outdoor use. Standard Specifications
Static Pressure Rating 450 PSI Triggering Threshold Bandwidth (Flow Rate) 3 GPM (11.35 liters/minute) Maximum Surge 18 Feet Per Second (FPS) Compatible Pipe Stainless steel and brass water pipe, 2" through 4" (refer to Ordering Information below) Overall Dimensions Installed
3.75
Contact Ratings One SPDT (Form C) One SPST (normally open) 0.6 A @ 125 VAC 2.0 A @ 30 VDC Voltage Range 8.4-35V (DC-FWR) 108-132 VAC Current Draw 300 microamps @ 12/24 V(DC-FWR) 400 microamps @ 120 VAC Conduit Entrances Two openings for 1/2" conduit, one open, one knock-out type Operating Temperature Range 32F - 120F (0C to 49C)
Cover Tamper Switch Optional, par t no. 546-9000 Shipping Weight LFD20: LFD25-73MM: AFD25-76MM: LFD30-2: LFD40: 4.1 4.2 4.2 4.4 5.1 lbs. lbs. lbs. lbs. lbs. (1.8 (1.9 (2.0 (2.1 (2.3 kg) kg) kg) kg) kg)
Ser vice Use Water mist systems where low flow detection is required. Warranty 3 years U.S. Patent No. 6,084,521
3.0
U bolt nut Pipe saddle
1.6
Enclosure Rating NEMA 4 - suitable for indoor/outdoor use
Pipe Plastic vane
U bolt Width: See Table
Model Number LFD20 LFD25-73MM LFD25-76MM LFD30-2 LFD40
Width 4.6 4.6 4.6 5.2 5.7
Ordering Information
Model Numbers LFD20 LFD25-73MM LFD25-76MM LFD30-2 LFD40 Nominal Pipe O.D. and Wall Thickness 2" (60.3 mm OD), 3.9 mm to 4.5 mm 2-1/2" (73.0 mm OD), 4.8 mm to 5.2 mm 2-1/2" (76.1 mm OD), 4.3 mm to 4.7 mm 3" (88.9 mm OD), 5.0 mm to 5.6 mm 4" (114.3 mm OD), 5.4 mm to 6.4 mm Hole Size 1-1/4" 1-1/4" 1-1/4" 2" 2" Replacement Part Number 546-9000 WFDW WFDN4 Description Cover tamper switch kit Tamper proof wrench for cover Gasket kit
System Sensor Sales and Service
System Sensor Headquarters 3825 Ohio Avenue St. Charles, IL 60174 Ph: 800-SENSOR2 Fx: 630/377-6495 Documents On Demand: 1-800-736-7672 x3 Web: www.systemsensor.com System Sensor in Canada Ph: 905.812.0767 Fx: 905.812.0771 System Sensor in Europe Ph: + 44.1403.276500 Fx: + 44.1403.276501 System Sensor in China Ph: + 86.29.524.6253 Fx: + 86.29.524.6259 System Sensor in Singapore Ph: + 65.273.2230 Fx: + 65.273.2610 System Sensor in the Far East Ph: + 852.21919003 Fx: + 852.27366580 System Sensor in Australia Ph: + 613.54.281.142 Fx: + 613.54.281.172 System Sensor in India Ph: + 91.11.558.2119 Fx: + 91.11.567.6815
(c) 2000 System Sensor. The company reserves the right to change product specifications without notice.
A05-0290-000*9/00(5K)*#660

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