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SECTION IV - SYSTEM DESIGN UL EX. 3470 ULC CEx747 Page 4-46 REV. 3 10-1-02 DISTRIBUTION PIPING REQUIREMENTS (Continued) Distribution Piping Requirements - 3.0 Gallon System 1. The maximum leng1h between the start of the first branch line and the start of the last branch line must not exceed 24 ft. (7.3 m). When the supply line is split. the combined total of both legs of the supply line (from the start of the first branch line to the start of the last branch line) must not exceed 24 ft. . (7.3 m). See Figure 84. 2. The total length of all branch lines must not exceed 36 ft. . (10.9 m). See Figure 84. 3. Use a 3/8 in. union to connect the tank adaptor to the 3/8 in. supply line. 4. A maximum of two nozzles are allowed per duct branch line. 5. The requirements of the following table must not be exceeded: 3 BRANCH LINES L 'Exceptions: 1. Twelve (12) flow numbers are allowed in any one tank not containing two-flow appliance nozzles, and/or. a 1N nozzle for wok or griddle protection, and/or, a 1F nozzle for range protection, and/or, e 3N nozzle for f~r protection. . 2. Twelve (12) flow numbers are aHowed in any one tank for hood and duct protection. 3. Twelve (12) flow numbers are allowed with any one tank using only two-flow eppliance nozzles. 4. Twelve (12) flow numbers ere allowed with any one tank using only three-flow appliance nozzles. Special Instruction.: 1. Twelve (12) flow numbers are allowed when four (4) Dean Industries GTI Gas F~rs are protected at low proximity as shown in Figure 101 on pags 4-52. The discharge piping must be as shown in Figure 102 on Page 4-52. 2. For certain McOonald's applications. 11.5 flow numbers are allowed when using a combination of one (1) 2W duct nozzle, one (1) 112N electrostatic precipitator nozzle, one (1) 1N plenum nozzle, and four (4) two-flow appliance nozzles. Contact Ansul Applications Engineering Department for additional information.