Potter Tamper Switch Wiring Diagram

Potter Tamper Switch Wiring Diagram – 3 Table of Contents Preface … 4 Introduction … 5 Fire Alarm Signals … 6 Types of Sprinkler Systems … 7 Water Pipe Sprinkler Systems … 8 Straight Pipe Racer … 8 To Four Water Systems – Alarm Check Valve Wet System Secured Overpressure Direct Riser Protected Wet System Alarm Check Alarmed Overpressure and Retained Overpressure Dry Pipe Systems Normal Wet flow system selection guide Fig dry pipe system Water flow and diversion selection guide Fig Valve (tamper switch) guide fig Installation of water flow Installation of valve control switches , other types of control procedures

4 Introduction The purpose of this manual is to provide general information to those responsible for the design, installation and operation of sprinkler system monitoring. This manual covers terminology, basic theory of operation, basic system design, and installation information. As with any installation, manufacturers must be followed. It does not specify when or how to install a particular type of system in a particular location. This should be done by a qualified engineer or designer using knowledge of NFPA codes and standards, any local or national building codes, and the authority having jurisdiction. Information in this manual was obtained from: Potter Electric National Fire Protection Association [NFPA] National Electrical Manufacturers Association [NEMA] 4

Potter Tamper Switch Wiring Diagram

Potter Tamper Switch Wiring Diagram

5 Introduction When properly installed, monitored and maintained, automatic fire sprinkler systems are the most effective means of damage control and life safety in the event of a fire. In most cases, they detect and control the fire before the hazardous flame and Tx gas can destroy the building or cause loss of life. Although a sprinkler system is capable of extinguishing a fire, its main purpose is to stop the fire from spreading until firefighters arrive. In a fully spread unattended building, if one or more sprinkler heads are activated to extinguish the fire, water will continue to flow until the system is shut down. Unless the head is one of the closed types that recover when the temperature returns to normal. In addition, sprinkler pipes can freeze and crack if the heat source fails in winter. An open sprinkler head or broken pipe can cause serious damage if water leaks for several hours. Monitoring water flow and building temperature will alert the appropriate personnel to conditions that could damage the building. Sprinkler systems can be out of service for years or even decades, but they should be in perfect working order when needed. Although they have an excellent performance record, occasional failures can be fatal. Most of these failures are the result of a sprinkler system malfunctioning during a fire. Monitoring water flow, valve position, building temperature, etc. and regular testing according to NFPA standards will help ensure proper operation.

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6 Fire alarm signals Alarm: A signal indicating a fire emergency. 1. Automatic sprinkler system 2. Fire alarm station (pumping station) 3. Automatic fire detectors (smoke or heat detectors) B. Monitoring: The fire extinguishing system has an alarm that indicates an abnormal condition. 1. Control valve switch 2. High/low air pressure switch 3. Water tank level and temperature 4. Low general water pressure 5. Low building temperature switch C. Fault: fire control panel or related wiring signal indicating a problem with may cause the system to malfunction. 1. Loss of primary power (120VAC) 2. Loss of secondary power (battery) 3. Break in the wiring monitored at the initiator indicating the device or agent release device. 6

7 Types of Wet Pipe Sprinkler Systems Wet sprinkler systems are the most common and reliable sprinkler systems because they require no equipment other than sprinkler heads to operate. Water systems that use automatic sprinkler heads are connected to the pipes that contain the water and are connected to the water supply, so the water flows quickly from the outdoor sprinklers. Water only comes out of the heads that are open because of the fire. Dry Pipe System Dry pipe systems use automatic sprinklers connected to a compressed air pipe system. These systems use a dry pipe valve and air pressure to hold the water. When air pressure in the system is bled due to an open sprinkler, the water pressure opens the valve and fills the system. Water only comes out of the heads that are open because of the fire. Dry systems are often installed in unheated buildings or where sprinkler pipes can freeze. 7

8 Basic Sprinkler Systems and Flow Devices Water Alarms Piping Sprinkler Systems There are three main types of sprinkler systems #1. Straight Pipe Riser: There is no alarm in this type of system. Or a lift check valve or backflow prevention that separates the shower water from the supply water. The main riser is fed directly from the water and branches from all shelter buildings. These systems must use a wing (rudder) type switch. Due to constant changes in water pressure, the water flow switch must have a time delay or delay to prevent false alarms. Rest time is used to overcome the rising tide. As the main riser goes up, there may be branch lines leading to different floors or other areas of the protected structure. Depending on local or national requirements, the branch line may have a water control valve and a water switch. The valve allows the branch to be shut down for maintenance or other reasons while leaving the rest of the system running. The purpose of the water flow switch is to add more space to the system to better detect an open sprinkler. Note: All water control valves must be monitored. 8

9 Installation of direct pipe water movement and monitoring switch (primary riser flow switch) FIG. Figure 1. 2 Variable change from line 9

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10 #2. Wet system with alarm check valve: This type of system has an alarm check valve, the valve is basically a check valve with an alarm hole. The main purpose of the alarm check valve is to ring a mechanical bell called a water motor gong. The valve (if properly maintained) should help maintain a constant system pressure and reduce the possibility of false alarms. Under normal conditions, the clapper valve is closed, blocking the signal port, depressurizing the system and preventing water from the sprinkler system from returning to the municipal supply. When the sprinkler opens due to a fire or there is a large increase in the city pressure, the valve valve opens. Now the signal port is exposed to incoming water. When the pressure in the switch reaches 6 psi, the pressure switch will turn off or reset time will start in the built-in pressure switch. This signal port can be transmitted outside the building using a water motor gong. These systems may use a delayed vane type flow switch or they may use a pressure type switch. If used, a pressure type current switch should be installed in the alarm port in conjunction with the water gong motor. To avoid false alarms due to water explosion, a pressure switch should be installed on the top of the delay chamber (see Figure 3) or a delay button should be installed (see Figure 4). . . This line must have an automatic release to allow water to flow out and the pressure to zero so that the pressure switch can be reset after the voltage or signal valve is actuated. Pressure type switches can be installed without shutting down the sprinkler system. Since they are installed in the signal port, there is no pressure or water under normal conditions. It is not necessary to remove the sprinkler system, it can be installed without turning off the water. Thus, the sprinkler system does not work. Retard chambers are metal containers filled with water in the presence of city pressure. They absorb pressure surges, thus allowing the button to operate only in the true signal state. There is an automatic draw at the bottom of the room for explosion output. Smooth chambers need maintenance to keep the tube clear and not blocked by rust or corrosion. If the voltage does not exit the delay chamber before another voltage occurs, the delay chamber may flood the button to send a false signal. A built-in retard pressure switch ensures the system is always operational and eliminates the maintenance required on the delay chamber. Automatic draw is still required to relieve line pressure. Note: All water control valves must be monitored. Pressure type switches shall be installed before any shut-off valve, or

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