2615 BROADWAY QFC 2017-10-03 - Laserfiche WebLink

• • SECTION IV — SYSTEM DESIGN UL EX.3470 ULC CEx747 Page 4-45 4-1-06 REV 3 ACTUATION AND EXPELLENT GAS LINE REQUIREMENTS (Continued) 2.A combined total of nine fittings may be used in these lines, Expellant Gas Line eight 90'elbows and one tee.Two 45°elbows equal one 90° 1.The expellant gas line piping is installed from the regulated elbow. release mechanism in double and multiple-tank systems, and 3.If two tanks are connected to the regulated release assembly from the regulated actuator assembly in multiple-tank sys- in a multiple-tank system arrangement, the total combined tems.The expellant gas line is the piping between the regula- length of the actuation and expellant gas lines must not for and the tank-enclosure/tank-bracket assembly. The total exceed 30 ft.(9 m) when using a"double-tank"nitrogen car- length of the expellant gas line from the regulated release tridge, an LT-A-101-30 nitrogen cartridge, or a 101-30 carbon mechanism or each regulated actuator assembly must not dioxide cartridge.See Figure 81. exceed 30 ft. (9 m) when using a"double-tank"cartridge, an LT-A-101-30 Cartridge,or a 101-30 Cartridge.See Figures 83 DISTRIBUTION PIPING REQUIREMENTS and 84. Once the nozzle placement and quantity of tanks has been deter- mined, it is then necessary to determine the piping configurations EXPELLANT GAS LINE between the tank adaptor and each discharge nozzle.This section MAXIMUM LENGTH-30 FT.(9 m). contains the guidelines and limitations for designing the distribu- tion piping so that the liquid agent will discharge from the nozzles at a proper flow rate.These limitations should also be referred to when selecting the mounting location for the regulated release mechanism and agent tank. General Piping Requirements 1.All R-102 system piping is straight line.Therefore,the need for critical lengths and balancing is minimized. 2 Two 45°elbows count as one 90°elbow. 3.Each branch line includes the tee or elbow leading to it, and "ANSUL AUTOMAN" all fittings within the branch line itself. REGULATED RELEASE 4.The minimum piping length of Schedule 40, 3/8 in.pipe from ASSEMBLY the tank outlet to any nozzle protecting a range,fryer, or wok must be 6 ft.(1.8 m). 5.Pipe lengths are measured from center of fitting to center of FIGURE 83 fitting.See Figure 85. 000776 CENTER TO CENTER EXPELLANT GAS LINE MAXIMUM LENGTH-30 FT.(9 m). MAXIMUM NO.OF FITTINGS-9 ' FIGURE 85 000776 6.All distribution piping must be 3/8 in. Schedule 40 black iron, chrome-plated,or stainless steel.Do not use hot dipped gal- vanized pipe on the distribution piping. 7. All threaded connections located in and above the protected area must be sealed with pipe tape.Tape should be applied to male threads only.Make certain tape does not extend over the end of the thread,as this could cause possible blockage of the agent distribution. 8. Before installing blow-off caps on nozzles, apply a small amount of Dow Corning No. 111 silicone grease across the opeing in the nozzle tip and also a small amount coating the REGULATED ACTUATOR ASSEMBLY exterior of the blow-off cap.This will help keep cooking grease FIGURE 84 from building up on the cap. 000777 ► 9. Tees used in the distribution piping can be used as thru tees, . side outlet tees, or bull tees.