User manual BOSCH GWH-635-ES

[. . . ] GWH-635-ES INDOOR MODEL Temperature Modulated with Electronic Ignition Suitable for heating potable water only - Not approved for space heating purposes (Intended for variable flow applications) GWH-635-ES-N - Natural Gas GWH-635-ES-L - Liquefied Petroleum (LP) Gas 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 vapor and liquids in the vicinity of this or any other appliance. Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. For assistance or additional information consult a qualified installer, service agency or the gas supplier. [. . . ] Note: While in this mode the appliance will run constantly at maximum power and allow maximum water flow. B Turn on high volume of hot water flow (at least 6 gpm) and heater will ignite. B Record operating gas pressure reading in table 5. for LPG will result in insufficient degree rise to the hot water being used, and must be corrected. See Gas Connections, chapter 2. 10. Fig. 24 Gas pressure measuring (left tapping) 6 720 607 072 17 Appliance details Static Gas Pressure Reading (see Chapter 2. 12) enter here: ___________________ Operating Gas Pressure Reading (see Chapter 2. 12) enter here: ___________________ Table 5 HIGH ALTITUDE OPERATION Altitude Natural Gas: Liquid Propane: For operation at elevations above 2, 000 ft (610 m) the equipment ratings shall be reduced at the rate of 4% for each 1, 000 ft (305 m) above sea level 0 - 4, 000 ft (0 - 1, 219 m) no modification no modification local codes if more stringent). Never sweat any rigid piping directly to or beneath the water connections, damage can occur to the internal water valve from heating of the pipe. Plastics or other PEX type plumbing line materials are not suitable for connecting directly to the water heater. Keep water inlet and outlet pipes to no less than ¾" (19. 05mm) diameter to allow the full flow capacity. If the cold and hot connections to the heater are reversed, the heater will not function. Be certain there are no loose particles or dirt in the piping. Blow out or flush the lines before connecting to the water heater. 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 valve is to be placed between the PRV and the heater. 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. [. . . ] The Heat Exchanger If the heat exchanger fails within fifteen (15) years after the original installation and operation, BBTNA will furnish a replacement heat exchanger. However, if the water heater is installed in other than a single family dwelling, this heat exchanger warranty is limited to two (2) years from date of original installation and operation. Exceptions This warranty will not apply: · 1. to defects or malfunctions resulting from failure to properly install, operate or maintain the unit in accordance with the printed instructions provided; · 2. [. . . ]