User manual BOSCH W 125...T1

[. . . ] W 125 K. . . Type of Gas natural propane natural propane Altitude standart (0-2, 000 ft. ) high * (2, 000-4, 500 ft. ) Input 11. 7 kW (40, 000 Btu/hr) 10. 5 kW (36, 000 Btu/hr) Main Burner Orifices Size, mm Qt. 6 * The high altitude ratings listed are Canadian Gas Association high altitude ratings and are only valid in Canada. In the U. S. , the National Fuel Gas Code, ANSI Z223. 1/NFPA 54 recommends for high altitude installations above 2, 000 feet, that the input rate be reduced 4% for each 1, 000 feet above sea level. 2 FORWARD This design complies with CAN 1-4. 3-77 and ANS1 Z21. 10. 3b 1994 as an instantaneous gas water heater. In addition the unit complies with CAN1-2. 17-M80 for use at high altitude, 2. 000-4. 5000 feet above sea level. [. . . ] The W125K. . . instantaneous gas water heater is supplied with a gas pipe, a gas pressure regulator and a manual gas cock that must be installed on the heater before attaching the gas supply line, see figure 3. Failure to install gas pipe, the main manual gas valve and the pressure regulator, or the failure to install them in the sequence show in figure 3 will be in violation of the A. G. A. BOSCH water heaters are shipped from the factory with the gas pressure regulators preset for the gas shown on the rating plate to the correct pressure. In Canada, for high altitude operation; In U. S. , for standard altitude operation unless specially marked as a high altitude unit. VENTING The BOSCH model W125K. . . instantaneous gas water heater has a built-in a draft diverter is designed for indoor installation only. The draft diverter outlet must be connected to a clear, unobstructed vent of the same size or larger, refer to: In Canada, CAN 1-B149 Installation Code for detailed requirements In U. S. , ANZI Z223. I/NFPA 54 National Fuel Gas Code for detailed requirements The minimum length of a vertical vent up to the terminal must be 2 ½ feet. WATER CONNECTIONS The W125K comes supplied with a ½'' NPT cold water inlet adapter and a flexible wire braid hot water outlet with a ½'' NPT connection. 4 Check to make sure that the gas listed on the rating plate is same as gas listed on the pressure regulator. See PRESSURE REGULATION section of this manual for information regarding gas pressure settings. Note: Before attaching the gas supply line, be sure that all gas pipe is clean on the inside. To trap any dirt or foreign material in the gas supply line, a dirt leg must be incorporated in the piping. The drip leg must be readily accessible and not subject to freezing conditions. Joint compounds (pipe dope) shall be applied sparingly and only to the male threads of pipe joints. The joint compound used must be resistant to the action of liquified petroleum gases. Soap and water solution, or other material acceptable for this purpose, shall be used in locating gas leaks. Matches, candles, lighters, or other ignition sources shall not be used for this purpose. PROPANE SUPPLY Figure 4 Where used with propane (LP gas) a separate correct propane regulator must be installed at propane tank to deliver propane to BOSCH regulator at 11'' W. C. pressure. PRESSURE TAP PRESSURE REGULATOR MANUAL GAS VALVE Figure 3 WARNING The heater and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess 3, 45 KPa (½ psig). The water heater must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 3, 45 KPa (½ psig). The water heater, including the pressure regulator and manual valve provided with it, must not be operated at gas supply pressures in excess of 3, 45 KPa (½ psig). If overpressure has occurred such as through improper testing of the gas lines or emergency malfunction of the supply system, the gas valve and regulator must be checked for safe operation. Make sure that the outside vent valves are protected against blockage. Vent blockage may occur during ice storms. 5 OPERATING INSTRUCTIONS WARNING If the water heater has been damaged or exposed to flooding, fire, or sooting do not operate the heater until all corrective steps have been taken by a qualified serviceman. FILLING Before proceeding with operation of the water heater make sure that the system is filled with water. Open all hot water faucets connected to the W125K. . . to allow trapped air to escape from heater and piping. Close all faucets, once water flows freely and all air has escaped from system. [. . . ] Do not plug the pressure relief valve. Figure 6 If the pilot flame is too small, then the pilot burner must be cleaned. The position of the igniter electrode should also be checked to assure that electrode is approximately 3 mm (1/8'') from pilot, see figure 6. The main burner should exhibit the following characteristics: · · · · Provide complete combustion of gas. Burner flames should be blue and there should be no lifting of flames from burner ports, figure 7. PERIODIC REMOVAL OF LIME DEPOSITS In hard water areas, depending on frequency of use, the heater should be checked for accumulation of calcium carbonate (lime) and delimed, if necessary. [. . . ]