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Y , SECTION 4—SYSTEM DESIGN R-102 Restaurant Fire Suppression Manual UL EX3470 ULC EX3470 PAGE 4-72 REV. 11 2014-SEP-01 DETECTION SYSTEM REQUIREMENTS(Continued) ' Detector Placement Requirements(Continued) NOTICE COOKING APPLIANCES The conduit offset can be used at the top or If the cooking appliance is located under an exhaust duct where bottom of the regulated release to change a detector has been mounted, it is normally not necessary to direction of the conduit. The conduit offset • - utilize another detector for that cooking appliance, provided the cannot be used with pulley tees. All other detector is not more than 12 in. (304 mm) into the duct and the changes in direction must be made by using appliance has no larger cooking surface than 48 in. x 48 in. ANSUL approved pulley elbows (Part No. (1219 mm x 1219 mm).See Figure 4-141. 423254 or 415670). See Figure 4-142. Note: If two appliances are located under a duct opening where a detector has been mounted and both appliances together do not exceed a cooking surface of 48 in. x 48 in. (1219 mm x 1219 mm) and the detector is located above both the protected appliances, it is not necessary to utilize an additional detector provided the duct detector is not more than 12 in. (304 mm)into the duct opening. 0 .. r________. r. 1 r-i-- L., ., 1 (, , , , , APPLIANCE APPLIANCE APPLIANCE REQUIRES COVERED BY REQUIRES SEPARATE DETECTOR SEPARATE DETECTOR UNDER DUCT I DETECTOR• I FIGURE 4-142 000270 • FIGURE 4-141 Fusible Link Selection 000269 When possible, temperature readings should be taken at each Each cooking appliance with a continuous cooking surface not detector location to determine correct fusible link temperature exceeding 48 in.x 48 in. (1219 x 1219 mm)can be protected by rating. Temperature can be recorded using either a maximum a minimum of one detector. Cooking appliances with a-continu- registering thermometer (Part No. 15240) temperature tape or ous cooking surface exceeding 48 in.x 48 in. (1219 x 1219 mm) any other accurate thermometer. must be protected by at least one detector per 48 in.x 48 in. (1219 x 1219 mm) cooking area. Detectors used for cooking f ""-�►4D ci appliances must be located above the protected appliance O toward the exhaust duct side of the appliance. The detector k"'g�• should be located in the air stream of the appliance to enhance 1 System response time. �� TEMPERATURE RATING STAMPED ON FUSIBLE Note: For overlapping detector coverage, see Page 4-60 for LINK BODY design requirements.ac=4L8te Detection Line Requirements 000170 000171 0- SL STYLE A-PC STYLE CONDUIT FIGURE 4-143 Rigid conduit or 1/2 inch EMT thin-wall conduit may be used. Standard steel conduit fittings (compression type are recom- Select correct UL Listed fusible link(s) for installation in detec- mended) must be employed to properly install the detection tor(s) according to the temperature condition. Two styles are` \, system. All conduit or pipe must be firmly supported. When available. See Figure 4-143. See Component Section fore,;: ' using pipe, make certain that all ends are carefully reamed, detailed temperature ratings. deburred and blown clear of chips and scale before assembly. /ei /