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R-102 Restaurant Fire Suppression Manual SECTION 4-SYSTEM DESIGN - <br /> UL EX3470 ULC EX3470 <br /> 2014-SEP-01 REV. 11 PAGE 4-67 <br /> E <br /> t <br /> _ DISTRIBUTION PIPING REQUIREMENTS(Continued) <br /> Distribution Piping Requirements-3.0 Gallon System <br /> 1. The maximum length between the start of the first branch SUPPLY•--..,...a <br /> line and the start of the last branch line must not exceed TEE <br /> 24 ft (7.3 m). When the supply line is split, the combined <br /> total of both legs of the supply line (from the start of the �'.. <br /> first branch line to the start of the last branch line)must not t%13 I <br /> exceed 24 ft7.3 m). See Figure 4-134. 000266 <br /> ( ) g p BOTH LEGS OF SUPPLY <br /> 2. The total length of all branch lines must not exceed 36 ft LINE MUST NOT 3 BRANCH LINES <br /> (10.9 m).See Figure 4-134. EXCEED 24 FT(7.3 m) <br /> 3. Use a 3/8 in. union to connect the tank adaptor to the 3/8 in. <br /> supply line. <br /> 4. A maximum of two nozzles are allowed per duct branch line. 2W NOZZLE•-•••,...„. 1N NOZZLE <br /> 5. The requirements of the following table must not be10 <br /> exceeded: <br /> 1N NOZZLE <br /> 110 230 NOZZLE <br /> 245 NOZZLE . <br /> 1/2N NOZZLE <br /> / (BRANCH LINE IN BOLD) <br /> k. COMBINED LENGTH MUST 000502 <br /> NOT EXCEED 36 FT(10.9 m) <br /> FIGURE 4-134 <br /> ►3.0 GALLON SYSTEM <br /> Duct Plenum Appliance <br /> Requirements Supply Line Branch Line Branch Line Branch Line <br /> Pipe Size 3/8 in. 3/8 in. 3/8 in. 3/8 in. <br /> Maximum Length 40 ft • 8 ft O ft 12 ft <br /> (12.1 m) (2.4 m) (1.2 m) (3.6 m) <br /> Maximum Rise 6 ft 4 ft 2 ft 2 ft <br /> (1.8 m) (1.2 m) (0.6 m) (0.6 m) • <br /> Maximum 90° 9 4 4 6 <br /> Elbows <br /> Maximum Tees 1 2 2 4 <br /> Maximum Flow 11* 4 2 4 <br /> Numbers <br /> *Exceptions: <br /> 1.Twelve flow numbers are allowed in any one tank for duct and plenum protection only. <br /> 2.Twelve flow numbers are allowed with any one tank using only two-flow appliance nozzles. <br /> 3.Twelve flow numbers are allowed with any one tank using only three-flow appliance nozzles. <br /> 3 Special Instructions: <br /> (¢�� 1 1.Twelve flow numbers are allowed when four Dean Industries GTI Gas Fryers are protected at low proximity as shown In Figure 4-66 on Page 4-32.The discharge piping must be <br /> .. as shown In Figure 4-67 on Page.4-32. <br /> 2.For certain McDonald's applications,11.5 flow numbers are allowed when using a combination of one 2W duct nozzle,one 1/2N electrostatic precipitator nozzle, <br /> one 1N plenum nozzle,and four two-flow appliance nozzles.Contact the Applications Engineering Department for additional Information. <br />