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• <br /> ulletiin <br /> by Tyco Fire Suppression & Building Products <br /> One Stanton Street <br /> Marinette, WI 54143 -2542 <br /> www.ansui.com <br /> Bulletin No. 5653 <br /> DATE: April 29, 2010 <br /> TO: All Authorized ANSUL R -102 System Distributors and OEMS's <br /> FROM: Product Management — Restaurant Systems <br /> SUBJECT: Non -UL- Listed Fire Protection for Conveyor Pizza Ovens <br /> The UL300 Standard: Fire Testing of Fire Extinguishing System for Protection of Commercial Cooking <br /> Equipment does not currently address a test protocol for conveyor pizza oven protection. However, in many <br /> jurisdictions, the Authority Having Jurisdiction has required fire protection for conveyor pizza ovens. In the <br /> past, appliances not addressed in the UL300 test standard have been protected by following listed protection <br /> options for other appliances with similar operating characteristics. Generally, these appliances presented <br /> a more severe hazard than the appliance in question. In the case of conveyor pizza ovens, chain broiler <br /> protection was utilized. <br /> To confirm recommended protection, we recently conducted a conveyor pizza oven fire test following the <br /> chain broiler test protocol outlined in UL 300, substituting fatty hamburgers with a grease coated pizza crust, <br /> to emulate the cooking process used by conveyor pizza ovens. <br /> Prior recommendations for conveyor pizza ovens larger than the two 1N horizontal nozzle limitations for a <br /> chain broiler, suggested using four 1N nozzles, each positioned at the end corners and aimed diagonally <br /> across the chain within the oven. Based on the actual fire testing, we now recommend two 245 nozzles <br /> per conveyor: one nozzle is positioned at the inlet and one nozzle is positioned at the outlet of the conveyor <br /> pizza oven on the same side of the oven and aimed at the opposite corners. Utilizing two 245 nozzles <br /> as recommended is suitable protection for conveyors larger than the limitations for a chain broiler but not <br /> exceeding 38 in.(96.5 cm) wide x 70 in (177.8 cm) long. <br /> If you should have questions pertaining to this bulletin, please contact your U.S. District Manager or <br /> International Area Manager; or call Technical Services as noted below. <br /> Main Telephone Numbers: 1- 800 -862 -6785 or 1 -715- 735 -7415 <br /> Customer Services: Press 2 • Technical Services: Press 4 • Training Services: Press 6 • Quality Assurance: Press 8 <br /> Literature Fax Orders: 1- 800 - 543 -9822 or 1-715-732-3474 <br />