Buy NFPA 17A: WET CHEMICAL EXTINGUISHING SYSTEMS from SAI Global. This edition of NFPA 17A, Standard for Wet Chemical Extinguishing Systems, was Changes to the edition clarified inspection, maintenance, and service. Title, NFPA 17A: Standard for Wet Chemical Extinguishing Systems, Edition . Publisher, NationalFireProtectionAssoc. ISBN, ,
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Documents Flashcards Grammar checker. Additional notes required for solid fuel burning. OCFA final inspection required. Please schedule all field inspections at least 48 hours in advance.
Phasing of inspections may require additional fees. Inspections canceled after 1 p. All gas fueled, electrically powered, and heat-producing equipment located under the hood shall shut down upon activation of the extinguishing system.
All discharge nozzles shall be provided with caps, covers, or other suitable protective devices. Piping shall be rigidly supported to prevent movement shall not be ntpa to sway for cleaning. Swivel nozzles shall be rotated to a predetermined aiming point and then tightened to hold that angle. Movable cooking equipment shall be provided with a means to ensure that it is correctly positioned 117a relation to the appliance discharge nozzle during cooking operations. Fryers shall be separated from surface flame appliances by 16 inches or an 8 inch steel or tempered glass baffle plate shall be provided between fryers and surface flames.
Manual pull stations shall be located no higher than four feet above 17z floor and shall be readily accessible for use at or near a means of egress from the cooking area a minimum of 10 feet and maximum of 20 feet from the kitchen exhaust system. The distance is measured from the edge of hood.
Where more than one manual actuator pull is installed, they shall be identified with a permanent sign indicating which extinguishing system each will activate.
A Class K rated extinguisher shall be provided within a maximum of 30 ft. Placement is at discretion of the inspector.
Additional extinguishers may be required based on travel distance for solid fueled equipment or multiple fryers with a 6 ft2 surface area or greater. Portable fire extinguishers 2090 be conspicuously located along normal paths of travel where they are readily accessible.
A placard shall be conspicuously placed near each extinguisher that states: Hood exhaust fans shall continue to operate after the extinguishing system has been activated, unless fan shutdown is required by a listed component of the ventilation system or by the design of the extinguishing system. Where a building fire alarm or monitoring system is installed, the automatic fire-extinguishing system s shall be monitored in accordance with NFPA A separate fire alarm plan is not required.
Wet chemical systems shall ncpa provided with an audible or visual indicator to show that the system is in a ready condition or is in need of recharging. For 200 hood extinguishing nfa, where changes in the cooking media, positioning of cooking equipment nfap replacement of cooking equipment occur, plans shall be submitted to the OCFA for the automatic fireextinguishing system and shall comply with the applicable provisions.
Extinguishing systems shall be serviced at least every six months, or after activation of the system, by a qualified trained person. Fusible links shall be replaced at least semiannually. The hood ventilation system shall be operated at the required rate of air movement, and approved grease filters shall be in place when cooking equipment under a kitchen grease hood is operated.
notes for hood extinguishing systems
Hydrostatic testing of the wet chemical extinguishing system shall be completed in intervals not exceeding 12 years. All interior surfaces of the exhaust systems shall be made accessible for cleaning and inspection purposes. If during the inspection it is found that the hood, grease removal devices, fans, ducts or other appurtenances have an accumulation of grease, such components shall be cleaned.
Flammable solvents or other flammable cleaning aids shall not be used. The complete technical manual shall be made available to the inspector. Please note, if a full manual is not available, the inspection may be discontinued and a rescheduling fee will apply. Testing during the OCFA inspection shall include a manual and automatic activation via fusible link.
A shut down of all electrical and gas cooking equipment shall also be demonstrated.
Nozzle type, height, and orientation relative to placement of cooking appliances will also be verified during the inspection. Solid cooking appliances shall be inspected, cleaned, and maintained in accordance with the following per NFPA The combustion chamber shall be scraped clean to its original surface once each week and shall be inspected for deterioration or defects.
Any significant deterioration or defect that might weaken the chamber or reduce its insulation capability shall be immediately repaired. The flue or chimney shall be inspected weekly for the following conditions: Residue that might begin to restrict the vent or create an additional fuel source b. The flue or chimney shall be cleaned before these conditions exist. The flue or chimney shall be repaired or replaced if any unsafe condition is evident.
Spark arrester screens located at the entrance of the flue or in the hood assembly shall be cleaned prior to their becoming heavily contaminated and restricted. Filters and filtration devices installed in a hood shall be cleaned. Storage of Solid Fuel 1. Where storage is in the same room as the solid fuel appliance or in the same room as the fuel-loading or clean-out doors, fuel storage shall not exceed a 1-day supply.
Fuel shall not be stored above any heat-producing appliance or vent or closer than 3 ft to any portion of a solid fuel appliance constructed of metal or to any other cooking appliance that could ignite the fuel. Fuel shall be bfpa to be stored closer than the requirements of Item 2 above where a solid fuel appliance or other cooking appliance is listed or approved for less clearance to combustibles. Fuel shall not be stored in the path of the ash removal.
Where stored in the same building as the solid fuel appliance, nfpaa shall be stored only in an area with 2009, floor, and ceiling of noncombustible construction extending at least 3 ft.
Fuel shall be permitted to be stored in an area with walls, floor, and ceiling of combustible or limitedcombustible construction. Fuel shall be separated from all flammable liquids, all ignition sources, all chemicals, and all food supplies and packaging goods. Where acceptable to the authority having jurisdiction, fuel storage areas shall be permitted to be protected with a fixed water pipe system with a hose capable of reaching all parts of the area.
In lieu of the sprinkler system outlined in Solid Fuel Handling and Ash Removal 1. Solid fuel shall be ignited with a match, an approved built-in gas flame, or nffpa approved ignition source. Combustible or flammable ngpa shall not be used to assist ignition. Matches and other portable ignition sources shall not be stored in the vicinity of the solid fuel appliance. Solid fuel shall be added to the fire as required in a safe manner and in quantities and ways not creating a higher flame than is required.
Long-handled tongs, hooks, and other required devices shall be provided and used to safely add fuel, adjust the fuel position, and control the fire without the user having to reach into the npfa.
Ash, cinders, and other fire debris shall be removed from the firebox at regular intervals to prevent interference with the draft to the fire and to minimize the length of time the access door is open.
NFPA 17A: Standard for Wet Chemical Extinguishing Systems, Edition – Google Books
All ash shall fnpa removed from the chamber a minimum of once a day. The ash shall be sprayed with water before removal to extinguish any hot ash or nfpz and to control the dust when the ash is moved.
Removal Container or Cart 1. A heavy metal container or cart minimum 16 gauge with a cover shall be provided for the removal of ash. The ash removal container or cart shall not exceed a maximum of 20 gal capacity, shall be assigned for this one purpose, shall be able to be nvpa easily by any employee assigned the task, and shall pass easily through any passageway to the outside of the building. The container or cart shall always be covered when it is being moved through the premises.
When any hole occurs in a container from corrosion or damage, the container shall be repaired or replaced immediately. Ash Removal Process 1.
notes for hood extinguishing systems
Tools shall be provided so that ash removal can be accomplished without having to reach into the chamber. The ash shall be spread out ngpa in small lots on the chamber floor or on a shovel, to be sprayed before it is removed to the metal container or cart. If 71a floor of the chamber is of a metal that is subject to rapid corrosion from water, then a noncombustible, corrosion-resistant pan shall be placed just outside the cleanout door for this purpose.
The ash shall be carried to a separate heavy metal container or dumpster used exclusively for the purpose.
Other Safety Requirements 1.
Metal-fabricated solid fuel cooking appliances shall be listed for the application where produced in practical quantities or shall be approved by the authority having jurisdiction. Where listed, metal-fabricated solid fuel cooking appliances shall be installed in accordance with the terms of their listings and with the applicable requirements of this standard. No solid fuel cooking device of any type shall be permitted for deep fat frying involving more than 1 qt. Site-built solid fuel cooking appliances shall be submitted for approval to the authority having jurisdiction before being considered for installation.
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