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Fabricar: Bosch
Tamaño del archivo: 2.94 mb
Nombre del archivo: 7fe7bb9b-5873-4719-9e60-11cd1d3efa72.pdf
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Resumen del manual
In the United States: The installation must conform with local codes or, in the absence of local codes, the National Fuel Gas Code ANSI Z223.1/NFPA 54. In Canada: The Installation should conform with CGA B149 INSTALLATION CODES and/or local installation codes. GAS LINE SIZING The gas supply piping should be sized according to the applicable plumbing code for a maximum draw of 175,000 BTUH. Measure the length of gas supply line and use the tables in Fig. 12 or the gas line manufactures sizing tables to determine the pipe diameter necessary to accommodate the BTU demand of the unit. If there are more gas drawing appliances on the line, size the gas line according to the total maximum amount of BTU draw for all appliances. Note: Under sizing the gas line may result in diminished output and improper operation. See chapter 2.9 for the procedure to confirm gas pressure. Fig. 11 B Install a manual gas shut off valve, on the gas supply line. B The use of a union when connecting gas pipe to the gas inlet connection is important, this will facilitate any necessary servicing and cleaning of the inlet gas particle screen. B The minimum diameter required for any appliance connector used is ... B National Fuel Gas Code requires that a sediment trap (drip leg) be installed on gas appliances not so equipped. The drip leg must be accessible and not subject to freezing conditions. Install in accordance with the recommendations of the serving gas supplier. The water heater must not be piped with gas supply pressures in excess of 0.5 psig. If overpressure has occurred, such as through improper testing of the gas lines or malfunction of the supply system, the gas valve must be checked for safe operation. When connections are made, check for gas leaks at all joints. Apply some gas leak detection solution to all gas fittings. Bubbles are a sign of a leak. A Combustible Gas Detector may also be used to detect for leaks. Gas piping Inlet gas particle screen Warning: The heater must be isolated from the gas supply piping system during any pressure testing of that system at test pressures equal to or more than 0.5 psig. Danger: If you have a leak, shut off the gas. Tighten appropriate fittings to stop leak. Turn the gas on and check again with a gas leak detection solution. Never test for gas leaks using a match or flame. Appliance details FOR NATURAL GAS Maximum Capacity of pipe in Cubic Feet of Gas per Hour for Gas Pressure of 0.5 Psig or less and a Pressure drop of 0.3 in Water Column (0.75mbar).(Based on a 0.60 Specific Gravity Gas) Btu numbers given in thousands. Follow boxed numbers for piping just one 250 SXO (example: .. B.I. Natural Gas pipe for 20 ft (6.1m). will handle 190,000 btu.s (55.7 kWh). For multiple appliances combine the total btu input load and then refer to applicable chart below. Nominal Iron Length of Black Iron Pipe, Feet Pipe Internal Size, Diameter inches inches 10 20 30 40 50 60 70 80 90 100 125 150 175 200 1/4 0.364 32 22 18 15 14 12 11 11 10 9 8 8 7 6 3/8 0.493 72 49 40 34 30 27 25 23 22 21 18 17 15 14 1/2 0.622 132 92 73 63 56 50 46 43 40 38 34 31 28 26 3/4 0.824 278 190 152 130 115 105 96 90 84 79 72 64 59 55 1 1.049 520 350 285 245 215 195 180 170 160 150 130 120 110 100 1 1/4 1.380 1050 730 590 500 440 400 370 350 320 305 275 250 225 210 1 1/2 1.610 1600 1100 890 760 670 610 560 530 490 460 410 380 350 320 2 2.067 3050 2100 1650 1450 1270 1150 1050 990 930 870 780 710 650 610 Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet Tube size, inches EHD* 10 20 30 40 50 60 1/2 18EHD 82 58 47 41 37 34 3/4 23 EHD 161 116 96 83 75 68 * EHD = Equivalent Hydraulic Diameter. The greater the value of EHD, the greater the gas capacity of the tubing. 1 30 EHD 330 231 188 162 144 131 1 1/4 37 EHD 639 456 374 325 292 267 FOR LP GAS Maximum Capacity of Pipe in Thousands of BTU per Hour of Undiluted Petroleum Gases (at 11 inches Water Column Inlet Pressure) (Based on a Pressure Drop of 0.5 Inch Water Column). * EHD = Equivalent Hydraulic Diameter. The greater the value of EHD, the greater the gas capacity of the tubing. Nominal Iron Pipe Black Iron Pipe Size, Length of Pipe, Feet Inches 10 20 30 40 50 60 70 80 90 100 125 150 1/2 275 189 152 129 114 103 96 89 83 78 69 63 3/4 567 693 315 267 237 217 196 185 173 162 146 132 1 107 732 590 504 448 409 378 346 322 307 275 252 1 1/4 220 149 121 103 913 834 771 724 677 630 567 511 1 1/2 330 229 185 155 141 127 118 108 102 976 866 787 Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet Tube size inches EHD* 10 20 30 40 50 60 1/2 18EHD 129 91 74 64 58 53 3/4 1 23 EHD 254 183 151 131 118 107 30 EHD 521 365 297 256 227 207 1 1/4 37 EHD 971 661 528 449 397 359 Maximum Capacity of Semi-Rigid copper Tubing in Thousands of BTU per Hour of Undiluted Liquefied Petroleum Gases (at 11 inches Water Column Inlet Pressure). (Based on a Pressure Drop of 0.5 Inch Water Column) * Source National Fuel Gas Code NFPA 54, ANSI Z223.1 -No Additional Allowance is necessary...
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