2525 W CASINO RD BASE FILE 2025-01-03

installation 4. Support piping so that no strains are imposed on unit or PIPING controls. CAUTION 5. Use two wrenches when connecting piping to unit controls. Gas pressure to unit heater controls must never exceed 14"W.C. 6. Provide a drip pocket before each unit and in the line w Testing Piping System. The appliance and its indi- here low spots cannot be avoided. (see Figure 4). vidual shutoff valve must be disconnected from the 7. Take-off to unit should come from top or side of main to gas supply piping system during any pressure testing avoid trapping condensate. if the test pressure is in excess of 1/2 psi. g. Piping,subject to wide temperature variations,should The appliance must be isolated from the gas supply be insulated. piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply 9. Pitch piping up toward unit at least 1/4" in 15' of system at test pressures equal to or less than 1/2 psi. horizontal run. 10. Compounds used on threaded joints of gas piping must be resistant to action of liquefied petroleum gases. 1. Installation of piping must be in accordance with local 11. Purge air before lighting unit by disconnecting pilot codes,and ANSI Z223.1-Latest Edition,"National Fuel Gas tubing at gas valve.In no case should line be purged into Code,"or CAN/CGA-B149.1 and .2 in Canada. Do not use heat exchanger. flexible connectors. ' 12. After installation, the system must be checked for 2. Piping to units must conform with local and national require- leaks. Use soap solution. ments for type and volume and gas handled,and pressure 13. Install a ground joint union and a gas cock upstream of drop allowed in the line. Refer to Table 4,to determine the the unit for easy servicing of controls,including a'/9"NPT cubic feet per hour(cfh)for the type of gas and size of unit to plugged tapping accessible for test gage connection.(See be installed. Using this cfh value and the length of pipe Figure 4). necessary,determine the pipe diameter from Table 1.Where several units are served by the same main,the total capacity, 14. Allow at least 5 feet of piping between any high cfh,and length of main must be considered.Avoid pipe sizes pressure regulator and unit control string. smaller than '/2". Table 1 allows for the usual number of fittings with a0.3"W.C.presuredrop.Where the gas supplied 15. Testing Piping System.The appliance and its individual gas a specific gravity other than 0.60, apply the multiplying shutoff valve must be disconnected from the gas supply factor given in Table 2 to the flow capacities in Table 1 to piping system during any pressure testing if the test determine total flow capacity. pressure is in excess of psi. The appliance must be isolated from the gas supply 3. After threading and reaming the ends, inspect piping piping system by closing its individual manual shutoff and remove loose dirt and chips. valve during any pressure testing of the gas supply system at test pressures equal to or less than 1/2 psi. table 1 / gas pipe capacities In Cu. Ft. per Hour with Pressure Drop of 0.3 in. W.C.with Specific Gravity 0.60 Length DIAMETER OF PIPE-INCHES of Pipe in Ft. +/z % 1 1+/. 1+% 2 3 4 6 a 15 76 218 440 750 1220 2480 6500 13880 38700 79000 30 73 152 285 590 890 1650 4700 9700 27370 55850 45 44 124 260 435 700 1475 3900 7900 23350 45600 60 50 105 190 400 610 1150 3250 6800 19330 39500 75 97 200 345 545 1120 3000 6000 17310 35300 90 88 160 320 490 930 2600 5400 15800 32250 105 80 168 285 450 920 2450 5100 14620 1 29850 120 158 270 420 860 2300 4800 13680 27920 150 120 242 380 710 2000 4100 12240 25000 180 128 1 225 350 1 720 1950 1 4000 11160 22800 210 205 320 660 1780 3700 10330 21100 240 190 300 620 1680 3490 9600 19740 270 178 285 580 1580 3250 9000 18610 300 170 270 545 1490 3000 8500 17660 450 140 226 450 1230 2500 7000 14420 600 119 192 380 1030 2130 1 6000 12480 GAS table 2 / specific gravity conversion SUPPLY LINE factors GROUND 1 GAS JOINT Multiplying factors to be used with Table 1 when the COCK UNION specific gravity of gas is other than 0.60. GAS \ SUPPLY LINE .:-- NATURALGAS PROPANE GAS Specific Factor Specific Factor Gravity Gravity 3" CONTO TROLS 0.55 1.04 1.50 0.633 MIN. PLUGGED 0.60 1.00 1.53 0.626 ye"NPT TEST GAGE CONNECTION 0.65 0.962 1.60 0.612 Figure 4 DRIP Recommended piping to controls POCKET Page 5