User manual BOSCH GWS 14-125 CI

[. . . ] In the Commonwealth of Massachusetts this product must be installed by a licensed plumber or gas fitter. Upon completion of the installation, these instructions should be handed to the user of the appliance for future reference. · Do not touch any electrical switch; do not use any phone in your building. · If you cannot reach your gas supplier, call the fire department. [. . . ] Consult the gas sizing specification tables provided by the flexible gas line manufacturer and sample CSST flexible gas line tables in Figure 22. Fig. 20 Vertical venting installation - Masonry Chimney (combustion air piping not being shown) A condensate drain tube must be attached to the exhaust collar of the heater for all vent type applications, see page, see page 11. Inlet gas particle screen Gas piping Fig. B The use of a union when connecting gas pipe to the gas inlet connection is critical, this will facilitate any necessary servicing and cleaning of the inlet gas particle screen. B Flexible gas line connectors are not recommended because they are commonly undersized and restrict gas flow. Oversize the diameter of any flexible gas appliance connector if one must be used. 6 720 607 072 15 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 635-ES (example: ¾" B. I. For multiple appliances combine the total btu input load and then refer to applicable chart below. Nominal Iron Pipe Size, Internal Diameter 10 32 72 132 278 520 1050 1600 3050 20 22 49 92 190 350 730 1100 2100 30 18 40 73 152 285 590 890 1650 40 15 34 63 130 245 500 760 1450 50 14 30 56 115 215 440 670 60 12 27 50 105 195 400 610 70 11 25 46 96 180 370 560 80 11 23 43 90 170 350 530 990 90 10 22 40 84 160 320 490 930 100 9 21 38 79 150 305 460 870 125 8 18 34 72 130 275 410 780 150 8 17 31 64 120 250 380 710 175 7 15 28 59 110 225 350 650 200 6 14 26 55 100 210 320 610 Length of Black Iron Pipe, Feet inches inches 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 0. 364 0. 493 0. 622 0. 824 1. 049 1. 380 1. 610 2. 067 1270 1150 1050 Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet Tube size, inches 1/2 3/4 1 1 1/4 EHD* 10 18 EHD 82 23 EHD 161 30 EHD 330 37 EHD 639 20 58 116 231 456 30 47 96 188 374 40 41 83 162 325 50 37 75 144 292 60 34 68 131 267 * EHD = Equivalent Hydraulic Diameter. The greater the value of EHD, the greater the gas capacity of the tubing. 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 Size, Inches Length of Flexible Corrugated Stainless Steel Tubing (CSST), Feet Black Iron Pipe Length of Pipe, Feet 10 20 30 40 50 60 70 96 80 89 90 83 100 78 162 307 630 976 125 69 146 275 567 866 150 63 132 252 511 787 Tube size inches 1/2 3/4 1 1 1/4 EHD* 10 18 EHD 129 23 EHD 254 30 EHD 521 37 EHD 971 20 91 183 365 661 30 74 151 297 528 40 64 131 256 449 50 58 118 227 397 60 53 107 207 359 1/2 3/4 1 1 1/4 1 1/2 275 189 152 567 693 315 107 732 590 220 149 121 330 229 185 129 114 103 267 237 217 196 185 173 504 448 409 378 346 322 103 913 834 771 724 677 155 141 127 118 108 102 Maximum Capacity of Semi-Rigid (flexible, non Outside diameter Inch 3/8 1/2 5/8 3/4 10 39 92 20 26 62 30 21 50 corrugated) 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 for an ordinary number of fittings Copper Length of Tubing, Feet 40 19 41 90 50 _ 37 79 131 60 _ 35 72 70 _ 31 67 80 _ 29 62 90 _ 27 59 100 _ 26 55 90 199 131 329 216 107 181 145 121 112 104 95 Fig. 22 16 6 720 607 072 Appliance details 2. 11 Gas line sizing B It is strongly recommended that the Natural Gas pipe be Black Iron pipe the entire distance from the outside meter to the inlet of the gas connection. If the cold and hot connections to the heater are reversed, the heater will not function. Full port valves should be installed on both the cold water supply and hot water outlet lines to facilitate servicing the heater (see Fig. For installation on a private well system with the use of a pressure tank, the lowest pressure range setting recommended is 30-50 psi (2. 07 and 3. 45bar). Connecting the pressure relief valve (PRV) A listed pressure relief valve supplied with the heater must be installed at the time of installation. No reducing coupling or other restriction may be installed in the discharge line. The discharge line must be a minimum of 4" above a drain and installed such that it allows complete drainage of both the PRV and the line. The location of the PRV must be readily accessible for servicing or replacement, and be mounted as close to the water heater as possible. To install the PRV, a suitable fitting connected to an extension on a "T" fitting can be sweated to the hot water line. Support all piping. 4, 000 ft - 7, 000 ft (1, 219 m - 2, 134 m) CO2 adjustment with flue gas analyzer required See chapter 9 for instructions. Above 7, 000 ft (above 2, 134 m) Not approved Table 6 2. 13 Water connections When facing the heater, the ¾" cold water inlet is on the bottom right and the hot water outlet is on the bottom left. Install the heater centrally in the building if possible and make hot water piping runs as short as possible. INLET FILTER SCREEN HOT COLD Fig. 25 B THE USE OF A UNION WHEN CONNECTING BOTH WATER PIPES TO THE INLET AND OUTLET CONNECTIONS IS RECOMMENDED, THIS WILL FACILITATE ANY NECESSARY SERVICING AND REQUIRED CLEANING OF THE INLET WATER PARTICLE SCREEN. [. . . ] This way you have the precise water flow needed (mixing cold water to regulate temperature will increase the water flow with consequent waste of water). For increased safety shut off the appliance from the main water supply if your are staying away from home for a considerable time. At below freezing temperatures, disconnect the plumbing connections to the heater and allow the heater to drain. To prevent any freeze damage, introduce short bursts of compressed air (20-40 psi) through these connections to remove the residual water in the horizontal pipes and water valve. 34 6 720 607 072 Fifteen Year Limited Warranty 11 Fifteen Year Limited Warranty of the original water heater or a replaced water heater. [. . . ]