Évaluations - 3, GPA: 3.3 ( )

Fabricant : A.O. Smith Taille : 335.32 kb Nom Fichier : Langue d'enseignement:

MINIMUM MODELS PIPE SIZE INCHES GW-1000 THRU 2 1/2" 2500 NPT TWO TEMPERATURE WATER MIXING VALVE APPLICATION FACTORY PUMP SIZING BASED ON 50 EQUIVALENT FEET (15.2 m) OF PIPE. CIRCULATING RETURN LINE CONNECTIONS • TEMPERED WATER LOOP, IF USED, CONNECT TO POINT R. • STORED TEMPERATURE WATER LOOP, IF USED, CONNECT TO ANY OPENING Figure 13. Single boiler with vertical tank. NEAR BOTTOM OF TANK. 19 Table 13. Suggested Pipe Appliances (Natural) Length of Pipe in Feet (Maximum Capacity of Pipe in BTU/C. (0.5 psi) or Less and a Pressure C. (based on 0.60 Specific Gravity Gas w/of 1,000 BTU’s/Ft3) NominalIron PipeSize Cap. 10 Ft. 20 Ft. 30 Ft. 40 Ft. 50 Ft. 60 Ft. 70 Ft. 80 Ft. 90 Ft. 100 Ft. 125 Ft. 150 Ft. 175 Ft. 200 Ft. (Inches) (3.05) (6.10) (9.14) (12.19) (15.24) (18.29) (21.34) (24.38) (27.43) (30.48) (38.10) (45.72) (53.34) (60.96) 1 1/4" BTU/hr 1,400,000 - - - - - - - - - - - - - - - - - - - - - - - - - - kW 410 - - - - - - - - - - - - - - - - - - - - - - - - - - 1 1/2" BTU/hr 2,100,000 1,460,000 1,180,000 990,000 - - - - - - - - - - - - - - - - - - - - kW 615 428 346 290 - - - - - - - - - - - - - - - - - - - - 2" BTU/hr 3,950,000 2,750,000 2,200,000 1,900,000 1,680,000 1,520,000 1,400,000 1,300,000 1,220,000 1,150,000 1,020,000 - - - - - - kW 1,157 805 644 556 492 445 410 381 357 337 299 - - - - - - 2 1/2" BTU/hr 6,300,000 4,350,000 3,520,000 3,000,000 2,650,000 2,400,000 2,250,000 2,050,000 1,950,000 1,850,000 1,650,000 1,500,000 1,370,000 1,280,000 kW 1,845 1,274 1,031 879 776 703 659 600 571 542 483 439 401 375 3" BTU/hr 11,000,000 7,700,000 6,250,000 5,300,000 4,750,000 4,300,000 3,900,000 3,700,000 3,450,000 3,250,000 2,950,000 2,650,000 2,450,000 2,280,000 kW 3,222 2,255 1,830 1,552 1,391 1,259 1,142 1,084 1,010 952 864 776 718 668 4" BTU/hr 23,000,000 15,800,000 12,800,000 10,900,000 9,700,000 8,800,000 8,100,000 7,500,000 7,200,000 6,700,000 6,000,000 5,500,000 5,000,000 4,600,000 kW 6,736 4,627 3,749 3,192 2,841 2,577 2,372 2,197 2,109 1,962 1,757 1,611 1,464 1,347 Table 14. Suggested Pipe Size For Multiple Gas Appliances (Propane Gas) NominalIron PipeSize(Inches) Maximum Capacity of Pipe in BTU/hr and kW for Gas Pressures of 14 in. W.C. (0.5 psi) or Less and a Pressure Drop of 0.5 in. W. C. (based on 1.53 Specific Gravity Gas w/Heating Value of 2,500 BTU’s/Ft3 ) Length of Pipe in Feet (Metres) Cap. 10 Ft. (3.05) 20 Ft. (6.10) 30 Ft. (9.14) 40 Ft. (12.19) 50 Ft. (15.24) 60 Ft. (18.29) 70 Ft. (21.34) 80 Ft. (24.38) 90 Ft. (27.43) 100 Ft.(30.48) 125 Ft.(38.10) 150 Ft.(45.72) 175 Ft.(53.34) 200 Ft.(60.96) 1" BTU/hr 1,060,800 - - - - - - - - - - - - - - - - - - - - - - - - - - kW 311 - - - - - - - - - - - - - - - - - - - - - - - - - - 1 1/4" BTU/hr 2,184,000 1,482,000 1,201,200 1,029,600 - - - - - - - - - - - - - - - - - - - - kW 640 434 352 302 - - - - - - - - - - - - - - - - - - - - 1 1/2" BTU/hr 3,276,000 2,277,600 1,840,800 1,544,400 1,404,000 1,263,600 1,170,000 1,076,400 1,014,000 - - - - - - - - - - kW 959 667 539 452 411 370 343 315 297 - - - - - - - - - - 2" BTU/hr 6,162,000 4,290,000 3,432,000 2,964,000 2,620,800 2,371,200 2,184,000 2,028,000 1,903,200 1,794,000 1,591,200 1,482,000 1,326,000 1,248,000 kW 1,805 1,256 1,005 868 768 694 640 594 557 525 466 434 388 366 2 1/2" BTU/hr 9,828,000 6,786,000 5,491,200 4,680,000 4,134,000 3,744,000 3,510,000 3,198,000 3,042,000 2,886,000 2,574,000 2,340,000 2,137,200 1,999,800 kW 2,878 1,987 1,608 1,371 1,211 1,097 1,028 937 891 845 754 685 626 585 3" BTU/hr 17,160,000 12,012,000 9,750,000 8,268,000 7,410,000 6,708,000 6,084,000 5,772,000 5,382,000 5,070,000 4,602,000 4,134,000 3,822,000 3,556,800 4" kW 5,026 3,518 2,856 2,421 2,170 1,965 1,782 1,690 1,576 1,485 1,348 1,211 1,119 1,042 BTU/hr 35,880,000 24,648,000 19,968,000 17,004,000 15,132,000 13,728,000 12,636,000 11,700,000 11,232,000 10,452,000 9,360,000 8,580,000 7,800,000 7,176,000 kW 10,508 7,219 5,848 4,980 4,432 4,021 3,701 3,427 3,290 3,061 2,741 2,513 2,284 2,102 20 GAS CONNECTIONS WARNING THIS BOILER IS NOT INTENDED TO OPERATE AT GAS SUPPLY PRESSURE OTHER THAN SHOWN ON THE RATING PLATE. EXPOSURE TO HIGHER GAS SUPPLY PRESSURE MAY CAUSE DAMAGE TO GAS VALVES WHICH CAN RESULT IN FIRE OR EXPLOSION. IF OVERPRESSURE HAS OCCURRED SUCH AS THROUGH IMPROPER TESTING OF GAS LINES OR EMERGENCY MALFUNCTION OF THE SUPPLY SYSTEM, THE GAS VALVES MUST BE CHECKED FOR SAFE OPERATION. MAKE SURE THAT THE OUTSIDE VENTS ON THE SUPPLY REGULATORS AND THE SAFETY VENT VALVES ARE PROTECTED AGAINST BLOCKAGE. THESE ARE PARTS OF THE GAS SUPPLY SYSTEM, NOT THE BOILER. VENT BLOCKAGE MAY OCCUR DURING ICE BUILD-UP OR SNOW STORMS. WHEN LOCAL CODES REQUIRE A MAIN MANUAL SHUT-OFF VALVE OUTSIDE THE BOILER JACKET,A SUITABLE MAIN MANUAL SHUT-OFF VALVE MUST BE INSTALLED IN A LOCATION COMPLYING WITH THOSE CODES. IT IS IMPORTANTTO GUARD AGAINST GAS VALVE FOULING FROM CONTAMINANTS IN THE GAS WAYS. SUCH FOULING MAY CAUSE IMPROPER OPERATION, FIRE OR EXPLOSION. IF COPPER SUPPLY LINES ARE USED THEY MUST BE APPROVED FOR GAS SERVICE. BEFORE ...

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