Various Fire Suppression System

Detection System

Fusible Link

Early detection is the key to any successful fire suppression system. The same applies here with proven ANSUL methods of detecting fires in a difficult and unpredictable environment.

To do so, Ansul utilizes the environment itself by allowing the intense heat of a hazard fire to trigger the system through releasing fusible links that are soldered together with a temperature sensitive metal.

—( Regulated Release Mechanism )—

The fire suppression system is actuated by the ANSUL AUTOMAN
Regulated Release Mechanism. Located within its stainless steel enclosure, the Regulated Release Mechanism is triggered by the Fusible Link or remote Manual Pull Station. The mechanism is a spring-loaded device that, when tripped, pushes a puncture pin downward puncturing a seal in the compressed gas cartridge which pressurizes the agent storage tank and begins system discharge.

The regulated release mechanism is a spring-loaded, mechanical/pneumatic type capable of providing the expellant gas supply to one or two agent tanks, depending on the capacity of the gas cartridge used. It contains a factory installed regulator deadset at 100 psi (6.9 bar) with an internal relief of approximately 145 psi (10.0 bar). It has automatic actuation capabilities by a fusible link detection system and remote manual actuation by a mechanical pull station. The regulated release mechanism contains a release assembly, regulator, expellant gas hose, and agent storage tank housed in a stainless steel enclosure with cover. The enclosure contains knock-outs for 1/2 in. conduit. The cover contains an opening for a visual status indicator.

It is compatible with mechanical gas shut-off devices; or, when equipped with a field or factoryinstalled switch, it is compatible with electric gas line or appliance shut-off devices.

( Regulated Actuator Assembly )

When more than two agent tanks are required, the regulated actuator is available to provide expellant gas for additional tanks. It is connected to the cartridge receiver outlet of the regulated release mechanism providing simultaneous agent discharge. It contains a regulated actuator deadset at 100 psi (6.9 bar) with an internal relief of approximately 145 psi (10.0 bar).The regulated actuator assembly contains a regulated actuator, regulator, expellant gas hose, and agent tank housed in a stainless steel enclosure with cover. The enclosure contains knockouts to permit installation of the expellant gas line.

( Compressed Gas Cartridge )

The Compressed Gas Cartridge is directly connected to the Regulated Release Mechanism. When the Release Mechanism is triggered, a puncture pin is forced down piercing a hermetic seal in the cartridge releasing compressed gas into the agent tank. The compressed gas simultaneously pressurizes the gas shut-off valve air cylinder and the PRX
Agent Tank causing the system to discharge and the gas to shut off.

 

( Liquid Agent Tanks )

Agent Tank – The agent tank is installed in a stainless steel enclosure or wall bracket. The tank is deep drawn carbon steel finished in red enamel. Tanks are available in two sizes: 1.5 gallon (5.7 L) and 3.0 gallon (11.4 L). The tanks have a working pressure of 100 psi (6.9 bar), a test pressure of 300 psi (20.7 bar), and a minimum burst pressure of 600 psi (41.4 bar). The tank includes an adaptor/tube assembly. The adaptor is chrome-plated steel with a 1/4 in. NPT female gas inlet and a 3/8 in. NPT female agent outlet. The adaptor also contains a bursting disc seal which prevents the siphoning of agent up the pipe during extreme temperature variations.

Saponification – When the liquid fire suppression agent is applied to a kitchen fire such as is found in a deep fat fryer, the agent reacts with the cooking oil or grease and the heat to form a soap-like foam blanket. This acts as a barrier or vapor-securing blanket and helps to prevent oxygen from reaching the fire, sealing it from potential flashback. This process is called “Saponification.” Fatty acids combine with alkalines to produce a soapy solution in process known as saponification. Thus, when a suppression system is discharged on a burning deep fat fryer containing rendered animal fat, a soap blanket is formed cutting off the oxygen supply and containing the fire until the fuel (animal fat) is cooled below its auto-ignition temperature.

PRX Liquid Agent Tank

The wet chemical storage tank inside the ANSUL AUTOMAN® release enclosure holds the PRX® Liquid Agent. These may be one or more tanks and additional actuation devices, depending upon the scale of the system design and the number required to protect the appliance zone. When more than one tank is required, all tanks discharge simultaneously. At the heart of the PIRANHA fire suppression system is the PRX
Liquid Agent. Specifically developed for the PIRANHA system, PRX liquid agent is extremely effective on fires in hoods, ductwork or kitchen appliances. It is the first discharge stage in the 1-2 punch of the PIRANHA systems. Distributed from nozzles in an overlapping pattern, the atomized agent is discharged into the fire knocking down the flame and forming a vapor-securing blanket to minimize fire re-flashes. The PRX
liquid agent is non-corrosive and can be cleaned up easily in the event of a discharge.

Distribution Piping

The system agent distribution piping can utilize black iron pipe, chrome plated, or stainless steel pipe and fittings. It is pre-engineered to a specific system design and assembled according to standard code guidelines. The agent distribution piping system carries the PRX® Liquid Agent and water or the ANSULEX Low PH Liquid Agent from the ANSUL AUTOMAN
to the nozzles for discharge.

 

Discharge Nozzles

Each discharge nozzle is tested and listed with the R-102 system for a specific application. Nozzle tips are stamped with the flow number designation (1/2, 1, 2, and 3). Each nozzle must have a metal or rubber blow-off cap to keep the nozzle tip orifice free of cooking grease build-up. The discharge nozzles in a PIRANHA® system vary depending upon the system chosen and the location of the nozzle and the spray pattern needed for protection. One nozzle is for high proximity appliance and plenum protection and the other for low proximity appliance and duct protection. Nozzles have different flow rates and come with a protective rubber or stainless steel blow-off cap to keep the nozzle tip free of grease build-up.

 

Water Supply

Unique to the PIRANHA
fire suppression system is the water discharge stage. After the PRX
liquid agent has suppressed the fire, the water discharge follows. This cools the hazard area 15 times faster than a system without a water discharge and continuously rejuvenates the vapor securing blanket over the hazard area. It is truly the punch that knocks the fire out for good!

• Potable Water Supply

The standard way to setup a PIRANHA® fire suppression system is to use existing potable water. Used as the second agent, the water supply cools the hazard 15 times faster than standard wet chemical agents alone. This water is discharged moments after the PRX® Liquid Agent has suppressed the flames through the same distributed piping.

• Water Shutdown Device

The water shutdown device is an optional component which can be field installed in the ANSUL AUTOMAN® release. With the device installed, the water flow to the discharge nozzles will automatically shut down approximately 10 minutes after system actuation.

Gas Shut-off Valve Air Cylinder (Optional)

The Gas Shut-off Valve Air Cylinder within the ANSUL AUTOMAN® release is connected to the Gas Shut-off Valve by a stainless steel cable. Upon system actuation, the Gas Shut-off Valve Air Cylinder is triggered by compressed gas that forces the air cylinder piston downward. This provides tension on the cable causing the Gas Shutoff Valve to trip and close.

Gas Shut-off Valve (Mechanical or Electric) (Optional)

The Mechanical Gas Shut-off Valve is connected to the ANSUL AUTOMAN® Gas Shut-off Valve Air Cylinder. When the system has been actuated, tension is applied to the cable connected to the Mechanical Gas Shutoff Valve and releases the valve. This causes the valve to close and shut off the fuel supply connected to the appliances.

System Maintenance

A restaurant fire suppression system, like any system, is only good if it’s reliable. That starts with a proper maintenance schedule and quality technical support. Alarm Plus Co. Ltd is the sole authorized ANSUL
distributor and installer in Mauritius and we cover the region of Reunion Island and the Indian Ocean to support your fire suppression system. We are ready to answer your questions and will properly maintain your system to help assure its performance in the event of a fire. We use quality ANSUL
parts and our Technical Teams are trained by ANSUL
professionals to maintain your fire suppression system with the latest innovations in restaurant fire suppression. We are regularly updated on codes, standards and product developments to help make sure your ANSUL system is the safest on the market. Making sure your system works when you need it is as important as making the investment to protect your business.

How the ANSUL PIRANHA Operates?

A fire starts in the protected area…. Heat sensitive fusible link detectors activate the system. Appliance energy sources are automatically shut off by accessory equipment appropriate for the type of fuel used by your cooking equipment. The fire extinguishing agent is discharged into the plenum and duct and onto the cookingappliances. The agent and the hot grease mix to form a foam. This temporarily seals combustible vapours, helping to inhibit re-ignition. This seal must not be disturbed.

DISCHARGE PATTERNS

ANSUL PIRANHA restaurant fire suppression systems are designed to provide maximum protection for commercial kitchens. The flexibility in the PIRANHA
design is a straight-forward concept meeting the needs of kitchen owners by providing them with quality fire protection and the ability to change the system to meet their growing needs. Because there are many types of commercial kitchens, PIRANHA
has two design options: 1. Overlapping and 2. Appliance-Specific protection.

1. Overlapping System Design

 

PIRANHA Overlapping protection offers you the flexibility to move your appliances within a protected zone without having to re-design the system. This option is ideal for Chefs who want to replace or rearrange appliances in their kitchen. When flexibility and simplicity are most important, nozzles are placed in a straight-line arrangement providing overlapping agent discharge patterns. This creates a virtual fire-free zone where appliances of various types and sizes are protected – even if they are replaced or rearranged under the hood.

 

2. Appliance Specific Design

The most efficient fire protection is accomplished when nozzles are selected and aimed at specific hazard areas on each appliance. This method typically provides the most economical use of liquid agent reducing the size or quantity of storage tanks and associated hardware.

PIRANHA Appliance-Specific protection has nozzles dedicated for each kitchen appliance. In this type of system design, you are assured that each potential hazard has protection designed specifically for the cooking application itself. This type of system protects each appliance individually.

PYROCHEM KITCHEN KNIGHT II Restaurant Fire Suppression System

KITCHEN KNIGHT II Restaurant Fire Suppression System provides maximum protection for commercial kitchens. Its design flexibility meets the needs of kitchen owners by providing them with effective and efficient fire protection and the ability to change the system as their needs grow and change. The KITCHEN KNIGHT II systems provide appliance specific protection featuring nozzles dedicated for each kitchen appliance. Through this system design, you are assured that each potential hazard has protection designed specifically for the cooking application itself.

The system is engineered to protect: • Plenums (Hoods) • Ducts (Hoods) • Fryers • Skillet/Braising Pan • Ranges • Griddles • Char Broiler – Gas/Electric Radiant – Lava-Rock – Natural Charcoal – Solid fuel (wood) • Salamanders • Chain Broilers • Woks

System Features: KITCHEN KNIGHT II features: – PYRO-CHEM Wet Chemical Agent – Proven Design – Reliable Cartridge Operation – Aesthetically Appealing – UL Listed – Meets Requirements of UL 300 – ULC Listed – Meets Requirements of ULC/ORG-C1254.6 – CE Marked

Mechanical Control Head

The KITCHEN KNIGHT II Mechanical Control Head is responsible for system actuation. It can be mounted directly to the agent tank or remotely mounted allowing for simultaneous actuation to a series of tanks or a larger system. When a fire is detected, and the fusible link has separated or manual pull used, one of the cables attached to the Mechanical Control Head releases tension. This causes the gas supply to shut-off and the release of CO2 initiating agent discharge.

Wet Chemical Agent Tank

The Kitchen Knight II storage tank contains PYRO-CHEM Wet Chemical Agent. A KITCHEN KNIGHT II system may require one or more tanks depending on the scale of the system design and the number required to fully protect the appliance hazard. When more than one tank is required, they run in sequence and discharge simultaneously. A tank can be mounted directly to the Mechanical Control Head or independently depending upon the configuration required.

Flexible Agent Distribution Hose

If your commercial kitchen equipment uses casters, you can now clean without having to disconnect any fire suppression distribution piping, saving you time and headaches. The UL-listed flexible hose, for use with KITCHEN KNIGHT II and Ansul PIRANAH systems, allows for up to 5 ft. (1.52m) of extension and includes a restraining cable to ensure the appliance isn’t pulled too far from the wall. The new hose can be located behind any UL appliance (with casters) within the system so you can retrofit your kitchen for safer, more efficient cleaning.

Flexible Conduit System

The PYRO-CHEM flexible conduit system is designed for the KITCHEN KNIGHT II and the ANSUL PIRANAH Restaurant Fire Suppression Systems. Manufactured to work with existing EMT conduit systems, flexible conduit reduces installation time by allowing you to run conduit in spaces where EMT conduit might be difficult to run. Flexible conduit can go over, under, or around obstacles saving both time and money. It can be used between the Mechanical Control Head and the Manual Pull Station or the Mechanical Control Head and the Mechanical Gas Shut-Off Valve.