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. SECTION IV—SYSTEM DESIGN ' UL EX. 5174 6-5-98 Page 4-7 REV 1 TANK AND CARTRIDGE RE(�UIREMENTS CHART The following chart is used to determine tank (and cartridge) I'B- THRU TEE THRU TEE quirements after the total Rumber of nozzles have been determined. � Maximum Total No. Quantity and Nitrogen Cartridge of Nozzles Size of Tank(s) Size Required (Part No) � 7 (1) PIRANHA-7 LT-20-R (7032) BULLTEE `� 10 (1) PIRANHA-10 LT-30-R (5373) ��. 13 (1) PIRANHA-13 LT-30-R (5373) BULL � TEE 14 (1) PIRANHA-7 LT-20-R (7032) (1) PIRANHA-7' LT-20-R (7032) � THRU 17 (1) PIRANHA-7 LT-20-R (7032) � TEE (1) PIRANHA-10' LT-30-R (5373) 20 (1) PIRANHA-10 LT-30-R (5373) CONTINUOUS SPLIT (1) PIRANHA-10' LT-30-R (5373) SYSTEM SYSTEM 23 (1) PIRANHA-10 LT-30-R (5373) FIGURE 14 (1) PIRANHA-13* LT-30-R (5373) OO7fi85 26 (1) PIRANHA-13 LT-30-R (5373) (1) PIRANHA-13" LT-30-R (5373) GENERAL DISTRIBUTION PIPING RULES ►(Common to All Size Systems Both High and Low Proximity) 27 (7) PIRANHA-7 LT-20-R (7032) (1) PIRANHA-10" LT-30-R (5373) 1 Maximum elevation difference between the top of the tank to (1) PIRANHA-10` LT-30-R (5373) the highest nozzle = 9 ft. Additional combinations are available up to a maximum system 2• Maximum elevation difference between the lowest nozzle to size of 39 nozzles(three PIRANHA-13) the highest nozzle = 8 ft. ' Regulated Actuator 3. The water supply pressure must be between 30 to 100 psi at each Water Pressure Testing Assembly gauge. DISTRIBUTION PIPING REC�UIREMENTS 4 Minimum amount of total linear piping for a single nozzle Once the nozzle placement and quantity of tanks has been deter- system used to protect a fryer,wok, range, tilt skiilet or brais- mined, it is then necessary to determine the piping configuration ► ing pan = 8 0 ft. from each tank to the discharge nozzles.This section contains the 5. Maximum nozzles allowed downstream of the center outlet of guidelines and limitations for designing the distribution piping so a thru tee = 2. See Figure 15 that the system will discharge from all nozzles utilized at proper flow rates.These limitations should also be referred to when select- 6. Linear pipe lengths are measured center to center of fittings. ing the mounting location for the regulated release and agent tank. THRU TEE DISTRIBUTION PIPING DEFINITIONS / Bull Tee:A bull tee is defined as a tee positioned in the system so �� /� that the flow enters the center inlet of the tee and exits 90°out both � side outlets. See Figure 14. Thru Tee:A thru tee is defined as a tee positioned in the system CENTER so that the flow enters a side inlet and exits straight through the OUTLET tee to the opposite outlet and also exits 90°through the center out- FIGURE 15 let. See Figure 14 �,686 Continuous System:A continuous distribution piping system is 7 Multiple bull tees are allowed in both continuous and split sys- ►one that does not include a bull tee between the agent tank and tems as long as maximum linear and equivalent lengths are the first nozzle. See Figure 14 not exceeded. ►Split System:A split distribution piping system contains a bull tee g. No nozzles are allowed on the 1/2 in. pipe run. between the agent tank and first nozzle See Figure 14 � 9 Minimum number of nozzles in a system = 2 (low proximity Equivalent Length: Length of distribution piping, defined in feet, ; only) which includes the actual length of pipe (measured from center to center of fittings) and a given pipe length value assigned to each fitting used that must be added to the overall pipe length sum. Linear Length:The actual length of piping measured from center to center of fittings.