Excerpted from the newly revised standard estimating practice, ninth edition in the typical construction drawing phase, the building interior sprinkler is in a design drawing. Waterflow switches that are monitoring wet pipe sprinkler systems shall not be used. The spring holds the valve clapper closed, so that water will flow only in one direction. Fire sprinkler monitoring training manual potter electric signal. System sensor pibv2 supervisory switch monitors the open position of post indicator and butterfly control valves. Automatic sprinkler system valve tamper supervision. What is a tamper switch for fire protection systems. All water flow andor tamper devices shall be individually monitored by the main fire alarm system panel as a trouble or alarm point as dictated by the service using a unique addressable input module for each. System sensors pibv2 supervisory switch monitors the open position of post indicator and butterfly control valves. Automatic fire sprinkler switches alarm and supervisory switches allow sprinkler and other fire protection systems to be interfaced with hydraulic or electronic alarm systems so that upon activation of the system, an electrical or mechanical signal activates an audible or visible alarm or computerized notification device. Technical data approvals the figure 5 riser manifolds with a cover tamper switch for the waterflow alarm switch are ul listed, ulc listed, and fm approved.
It detects water flowing in the sprinkler system and causes the fire alarm system to sound the evacuation. Dry pipe system waterflow and air supervisory switch selection guide fig. Pibv2 shall be underwriters laboratories listed for indoor or outdoor use. Model shall be model number osy2a supervisory switch as manufactured by system sensor. Provide each sprinklerstandpipe system andor zone with a water flow switch. System sensors pibv2 supervisory switch monitors the open. The pibv2 shall be factory mutual, csfm, and mea app roved. When installed with the actuator in the vertical position, the pibv2 is nema 3r rated per ul. A tamper switch is a mechanical and electrical device connected to a fire protection valve that signals a warning if the valve partially or fully closes. General information this cover tamper switch mounts only to system sensor wfdn termimal blocks. The bottom mounting holes are used to mount the switch on the other side of the cabinet. Testing the ptsc and its associated protective monitoring system should be tested in accordance with applicable nfpa codes and standards andor the authority having jurisdiction manufacturer recommends quarterly or more frequently.
Sectional control valves, and all valves controlling water supply, shall be indicating type valves listed for use with sprinkler systems. The tamper switch alarms should be supervised by a 24hour remote station or may be locally monitored if the building is continuously. Sprinkler system types wet wet type systems are the most common type of sprinkler system that is installed. However there are a few main issues you will need to consider. Oct 01, 20 water flow, backflow, osy, tamper switch wet system fire sprinkler lines is constantly filled with water as opposed to a dry system such as a pre action system we will talk about these later. Potter rbvst universal ball valve switch w cover tamper sku. If the bell is 120 vac and installed by the sprinkler contractor and activated by a separate set of contacts in the flow switch, the plans must so indicate. The cover shall contain tamper resistant screws for which a security wrench will be provided with each switch. Tamper switch installation instructions fire alarm resources. Tamper switches are an essential component in a modern fire protection.
This cover tamper switch mounts only to system sensor wfdn termimal blocks. Alarm signals initiated by manual fire alarm boxes, automatic fire detec. This manual should be left with the owneruser of this equipment. The cover tamper switch can be wired into the plug circuit or wired as a separate circuit. Verify that the sprinkler alarm bell andor the pressure alarm switch electric alarm properly actuate. Show location of sprinkler system risers tamper switch supervision show location riser valves, piv, double backflow unit flow switch supervision. Disc must be partly closed so that no part is protruding beyond end of valve body. Potter rbvst universal ball valve switchw cover tamper sku. Set the tamper switch on the screw studs and fa sten the tamper switch to the back box with the two number six flange nuts provided. Switches shall be mounted so as not to interfere with the normal operation of the valve and shall be adjusted. Hammerberg says another point of confusion is who is allowed to test sprinkler equipment tied to the sprinkler monitoring system. A waterflow switch is the interface between the buildings fire suppression system and the buildings fire alarm system. Equipped with tamper resistant screws to prevent unauthorized. Standard for the inspection, testing, and maintenance of.
After reading this guide, you will be more knowledgeable about the water flow detectors, supervisory switches, pressure switches, explosion proof products, and alarm bells within a fire sprinkler system. I have had trouble with some of the heads because they are so old, so i am thinking of changing them out for newer rotor sprinkler heads. Fire sprinklers are becoming a requirement in many city and state codes for new buildings and remodels. The pibv2 consists of a rugged housing, intended for indoor and outdoor use.
A wet pipe system has water in the pipes in the ambient or normal condition and has heat responsive elements on all sprinklers. Tamper switch wiring procedure refer to figure 2 and the notes for wiring instructions. Preatio yste it v5 eluge alve single nterlok upervise r pilo ctuaion 112 hr nc dn40 hr n200 page 1 of 16 july 2014 tfp1415 worldwide ontats tycorecom general description the tyco dv5 supervised single interlock preaction system with dry pilot actuation fig. The first is a very common valve in most modern sprinkler systems. Cover tamper switch installation and maintenance instructions notice. Pocket guide to inspecting, testing and maintaining. Ld3510 butterfly valve ductile iron, sprinkler system. The valve has both flanged inlet and outlet, and is to be installed vertically on a wet pipe sprinkler system, and has capability of initiating the required alarm thmugh a water motor alarm or an electric pressure switch. Rugged, dual spdt switches enclosed in a durable terminal block.
I moved into a house with a ten year old sprinkler system that has impact sprinkler heads. Model bbscs02 threaded ends with tamper switch one inch 25 mm to 2. Determine system design capacity when planning an ef. Sprinkler heads have numerous designs, with an activating. Osy2a shall be underwriters laboratories listed for. The switch is set to trip on the decrease at 30 psi. The patrol should continue until the system is back into service. The first supervisory switch monitors low air pressure and prevents. Orient the pcvs so the spring will pull up the trip rod to follow the actuating cam inside the valve. Its also a good idea to have the sprinkler system drained so that the system can be charged with fresh water. Pibv2a post indicator and butterfly valve supervisory switch. The water in the sprinkler line is monitored by a pressure gauge usually located near the main fire riser and waterflow switch. The tamper switch features an actuating unit, usually a lever or cable with a resting position. Valve provides an air check so that the system can be automatically pressurized with a supervisory air or nitrogen pressure of 42 psi 2.
A supervisory low pressure alarm switch can be set at 20 psi 1. The model pcvs is a weather proof and tamper resistant switch for. Quick guide for fire sprinkler inspection requirements. Plrbvs the rbvs is designed to monitor the fully open position of a ball valve installed in a sprinkler system.
Once the system is filled, the clapper falls back, preventing the water from draining out and reentering the mains. Before installing any supervisory switches in sprinkler sys tems, be thoroughly. If the system will be installed using city water, follow the steps below. Tamper switches shall be provided on all automatic sprinkler systems which have flow switches, and isolation valves installed are. Both need to be tested by qualified personnel and the test report will likely have to be filed with your local jurisdictional authority water board. Tamper switches shall be wired such that it would send in a trouble signal on the same zone as the corresponding zone flow alarm. Before installing any supervisory switches in sprinkler sys tems, be. Apr 26, 2017 the magic number is set by your local ahj, applicable building codes, and standards but averages around eight. Water flow, backflow, osy, tamper switch fire alarms online. Osy2a shall be underwriters laboratories listed for indoor or outdoor use. The switch assembly shall include two switches each with a rated capacity of 10.
Switches shall be mounted so as not to interfere with the normal operation of the valve and shall be adjusted to operate within two revolutions of. The residual water in the pipe will continue to flow until lines are empty. All standpipe and automatic fire sprinkler system fdcs shall be properly identified so as to indicate clearly what each component or each piece of equipment serves. How many sprinkler tamper switches can you terminate to a. The installing contractor or sprinkler manufacturer should be contacted with any questions. Low air pressure switch is installed to monitor the air pressure.
The abcs of fire alarm systems part viii extinguishing systems. Water flow, backflow, osy, tamper switch wet system fire sprinkler lines is constantly filled with water as opposed to a dry system such as a pre action system we will talk about these later. Supervisory switch for fire sprinkler system valve potter roemer. Features nema 3r rated enclosure bidiractional actuator easy single side conduit entry adjustable length actuator with breakaway feature. And yet, this issue rises to the surface time and time again. The wpivs in photo 4 have both tamper switches and padlocked chains.
Most ahjs would like to see separate annunciation for each switch or valve within a common sprinkler room and this is often possible with an. Before any work is done on the fire sprinkler or fire alarm system, the building owner or their authorized. Valencia pipe sprinkler valve key is most commonly used with in ground lawn sprinkler systems. It seems that this easy way out tempts many fire alarm installers. Tamper switches potter potter flow switches flow switches. One inlet for every 250 gpm in system demand shall be provided in accordance with the minnesota state fire code. The system sensor wfd series is compatible with schedule 10 through 40 steel pipe, sizes 2. The abcs of fire alarm systems part viii extinguishing. Dry sprinkler system require air pressure instead of water in the branch lines the air pressure holds down a clapper valve, so that water can not be introduced into the system, unless the air pressure is lost used in areas that may freeze an air compressor keeps a constant pressure in the system when a fire releases a sprinkler head.
Roll the vane so that it may be inserted into the hole. Preatio yste it v5 eluge alve single nterlok upervise r pilo. Nfpa, installation of sprinkler systems, 20 edition. Estimating the cost of building fire sprinkler systems 1. A water motor gong is typically plumbed into the system, so running water will cause the gong to sound. Switch detects tampering and valve closure rohs compliant two spdt contacts description the model pcvs is a weather proof and tamper resistant switch for monitoring the open position of fire sprinkler control valves of the wall and yard post indicator and butterfly types. Systems notes the following errors in the 2017 edition of nfpa 25, standard for the inspection, testing, and maintenance of waterbased fire protection systems. Understanding your fire sprinkler system can be life saving. The unit will fit on most ball valves installed on backflowpreventers and alarm trim lines of dry, alarm, and deluge sprinkler valves.
Potter amseco rbvs retrofit ball valve switch jmac supply. Model 5 riser manifold for nfpa sprinkler systems. The magic number is set by your local ahj, applicable building codes, and standards but averages around eight. Features nema 3r rated enclosure bidiractional actuator easy single side conduit entry adjustable length actuator with breakaway feature built to accommodate up to 12 awg wire. Valve must not be installed with disc in full open position. Most ahjs would like to see separate annunciation for each switch or valve within a common sprinkler room and this is often possible with an addressable panels liquid crystal display lcd. Fire sprinkler control valve safeguarding tamper switcha tamper switch is an electromechanical device attached or integrated into the valve controls which sends an electrical signal if the valve is moved. Osy2 outside screw and yoke valve supervisory switch osy2a outside screw and yoke valve supervisory switch ulc model accessories osyrk replacement hardware kit wrenches, screw pack and jhooks wfdw replacement tamperproof wrench for cover 5467000 cover tamper switch kit hexw replacement hex wrench s0766xx tamper screws for cover. These instructions apply to system sensor switches for post indicator and. In some states, he says, the fire alarm dealer is permitted to flow the water at the inspectors test valve or turn the tamper switch to see if the supervisory signal is generated. The installation and maintenance of the sprinkler systems shall be in accordance with the applicable national fire protection association nfpa standard.
Also do inform the local security personnel and alarm control station, so that a false alarm is not signaled. One for the fire sprinkler system and the other for your automatic lawn sprinklers. The unit will fit on most ball valves installed on backflowpreventers and. The cover shall contain tamperresistant screws for which a security wrench will be provided with each switch. Testing the pcvs and its associated protective monitoring system should be tested in accordance with applicable nfpa codes and standards andor. The system shall be designed and installed to meet the hazard class. Provide each sprinkler standpipe system andor zone with a water flow switch. This is a quick reference field guide, with select abbreviated sections of nfpa 25, 72 and the plumbing. Browse ld3510 butterfly valve ductile iron, sprinkler system, ul listed in the nibco catalog including material number,upc code,valve size,connection type,description,turnsoperation. The valve has both flanged inlet and outlet, and is to be installed vertically on a wet pipe sprinkler system, and has capability of initiating the required alarm thmugh a. Vane type water flow switches can be installed in either vertical or horizontal sections of pipe. Transmits an electrical impulse to activate audible or visual alarm. Close the control valve, shutting down the water supply. Dec, 2011 hammerberg says another point of confusion is who is allowed to test sprinkler equipment tied to the sprinkler monitoring system.
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