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TOTAL SYSTEM ~ The PIRANHA.. system has been tested in accordance with UL I Standard 300 and is in compliance with NFPA 96 and NFPA 17A as a pre-engineered water assisted, wet chemical fire suppression ~ system. The PIRANHA Restaurant Fire Suppression System is a patented, pre-engineered, fixed, automatic fire suppression system devel- oped specifically for improved fire protection of commercial and institutional restaurant cooking appliances, exhaust hoods, and ducts. When actuated, the system discharges a fixed amount of proprietary wet chemical agent followed by water through the ~ same nozzles. Water is provided by the connection of the PIRANHA dedicated water supply. This connection is made after the primary domestic control valve serving the food service facility. No other shut-off valve(s) is allowed between the primary domes- tic control valve and the PIRANHA lockable, full flow, indicating, ~ shut-off valve, The three sizes of systems are: PI RAN HA-7: (7 nozzle capacity) PIRANHA-10: (10 nozzle capacity) PIRANHA-13: (13 nozzle capacity) The system is designed to provide either full hood continuous overlapping protection for a typical cooking appliance lineup or group protection for one or more appliances under a longer hood. The system can be pre-piped prior to the appliances being put in ~ place. Appliances protected within this manual that are eligible for overlapping nozzle protection can be freely interchanged within the hazard zone without changing or relocating the nozzles. Appliances that are not eligible for overlapping protection (such as upright broilers, chainbroilers, etc.) will require appliance specific ~ dedicated nozzle installation. The type of system required for the particular installation will be determined through the guidelines covered in "System Design." Additional equipment which may be required to complete the sys- tem design is explained in the "System Components" section. Additional devices covered are: remote manual pull stations, mechanical and electrical gas shut-off valves, electrical switches, and pressure switches. DESCRIPTION OF SYSTEM The tank assembly is filled with a proprietary wet agent under atmospheric pressure. The system is equipped with a pneumati- cally controlled water flow valve. The water inlet port of the valve ~ assembly is connected through the PI RANHA dedicated water I supply to the water source downstream of the primary domestic contr~1 valve ~~.rvicing .the food service ~acility. See "Water Supply ~ ReqUIrements In Section 5. The valve IS closed and under static water pressure, The high pressure gas inlet port of the valve is piped to the high pressure side of the ANSUL AUTOMAN release mechanism and is under atmospheric pressure until the fire sup- pression system is actuated. This high pressure line includes a check valve to trap high pressure gas in the line when the system is actuated. The low pressure gas inlet port on the pick-up tube assembly is piped to the low pressure side of the gas pressure regulator and is also under atmospheric pressure until the system is actuated. The gas pressure regulator receives its pressure from a gas cartridge installed in the release mechanism. The tank dis- charge outlet on the pick-up tube assembly is connected to the discharge piping of the agenUwater distribution system. SECTION II - SYSTEM DESCRIPTION UL EX. 5174 8-1-99 Page 2-1 REV. 1 ~ NOTICE The PIRANHA system includes an atmospheric anti-siphon vacuum breaker as an integral com- ponent, built into the AUTOMAN Release. The atmospheric anti-siphon vacuum breaker is used to eliminate the possibility of creating a vacuum. thus eliminating back siphonage of agent into the potable water supply. The atmos- pheric anti-siphon vacuum breaker meets the requirements of ASSE (American Society of Sanitation Engineers) Standard 1001. ANSI (American National Standards Institute) Standard A 112. 1. 1 and CSA (Canadian Standards Association) Standard B64. Based on backflow prevention testing by an indepen- dent laboratory. the PIRANHA system has been specifically listed and approved by IAPMO (Intemational Association of Plumbing and Mechanical Officials) in accordance with PS10B-9B, and each PIRANHA system bears the IAPMOIUPC logo indicating approval under the Uniform Plumbing Code. Underwriters'Laboratories (UL) has tested the PIRANHA system for mechanical and fire sup- pression performance in accordance with UL Standard 300. UL has not evaluated the integral anti-siphon vacuum breaker or any other back- flow prevention device with respect to their ability to prevent backflow from occurring. SYSTEM OPERATION When a fire is detected by the fire suppression system, the spring- loaded ANSUL AUTOMAN Release assembly automatically actu- ates to puncture the seal of the expellant gas cartridge, thereby releasing gas under high pressure to both the high pressure inlet of the water flow valve and the high pressure inlet of the pressure regulator, where the high gas pressure is reduced to a lower oper- ating pressure for the agent tank. The high pressure gas opens the valve to the water supply by moving the internal stem assembly toward the water inlet against the force of the spring and the stat- ic water pressure, Once the stem assembly is unseated, the trapped high pressure gas will hold it open until the gas pressure is manually released after the fire event when the system is recharged and reset. The low pressure gas from the regulator enters the top of the tank to expel the wet agent from the tank through the tank discharge outlet, discharge piping, and discharge nozzles. Once the low pressure gas is flowing. the regulator will feed the low pressure gas into the tank at a constant pressure until the decaying pressure of the gas in the cartridge falls below the preset outlet pressure of the regulator, at which time the gas pres- sure from the regulator will also decay. Although the valve was opened initially by the high gas pressure. water will not flow into the tank until the water pressure from the water supply overcomes the decaying gas pressure of the low pressure gas in the top of the tank. at which time water will auto- matically commence flowing through the tank. discharge piping, and the discharge nozzles. Water will continue to flow until it is manually shutoff upstream from the water flow valve after the fire ~ event is concluded or it was shut off approximately 10 minutes I after actuation if the system has a water shutdown device installed ~ in the ANSUL AUTOMAN Release.