User manual BOSCH W 125...T1

[. . . ] Instantaneous gas water heater Models W 125. . . T1 · installation · operation · maintenance The Bosch instantaneous water heater is a high efficiency, space saving answer to your water heating needs. All Bosch instantaneous water heaters heat water only as required; no energy is lost maintaining a large volume of water at elevated temperatures as in tank-type storage water heaters. Suitable for heating potable water only ­ not approved for space heating purposes. READ INSTRUCTIONS CAREFULLY BEFORE INSTALLING WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. - Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other applicance. - WHAT TO DO IF YOU SMELL GAS · Do not try to light any appliance. [. . . ] 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. Install in accordance with recommendations of serving gas supplier. Joint compounds (pipe dope) shall be applied sparingly and only to the male threads of pipe joints. Do not apply compound to the first two threads. The joint compound used must be resistant to the action of liquified petroleum gases. Before placing water heater in operation check for gas leakage. 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. These are part of the gas supply system, not the water heater. 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. Turn the water flow selector handle clockwise ( ) against stop. [. . . ] the National Fuel Gas Code, ANSI Z 223. 1/NFPA 54, recommends for high altitude installations, above 2000 feet that the input rate be reduced 4% for each 1. 000 feet above sea level. PREVENTIVE MAINTENANCE PILOT AND MAIN BURNER Check pilot and main burners at least every 12 months for the proper flame characteristics. The pilot flame should envelop approximately 10 mm (3/8 inch) of tip of thermocouple. 10 mm If the main burners fail to exhibit above characteristics they must be cleaned, either by blowing them off with compressed air or by washing them in soap and water and rinsing. If it proves necessary to wash the main burner assembly the following procedure should be used: 1. Turn off the gas supply to the water heater. [. . . ]