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. [. . . ] Flex line is NOT recommended, but if used, then oversize the diameter of the flex pipe, keep the length to a minimum and try to keep the flex line as straight as possible. B It is strongly recommended that the LP Gas pipe be semi-rigid copper or Black Iron pipe from the outside regulator to the inlet of the gas connection. For semirigid copper piping: 5/8" up to 10 feet (3. 05m) and ¾" up to 30 feet (9. 14m) distances. For Black Iron piping: ½" up to 20 feet (6. 1m) and ¾" up to 80 feet (24. 38m) distances. Flex line is NOT recommended, but if used, then oversize the diameter of the flex pipe, keep the length to a minimum and try to keep the flex line as straight as possible. 2. 12 Measuring gas pressure 2. 12. 1 Connecting Manometer B Shut off gas. B Remove front cover and locate inlet gas pressure measuring point (see Fig. B Loosen screw inside test point fitting (do not remove) and connect manometer tube on test point. B Operate all other gas appliances on same gas piping system at maximum output. B Press and hold "Program" (M) button and turn ON/ OFF switch to ON position. i THESE FIGURES ARE FOR GWH-635ES SUPPLY ONLY, ALL OTHER APPLIANCES IN THE BUILDING MUST BE INCLUDED IN THE PIPE SIZING. National Fuel Gas Code requires that a sediment trap (drip leg) be installed on gas appliances not so equipped. Also, a manual gas shut off valve must be installed on the gas supply line within close proximity of the water heater and be visible from the water heater. Warning: The heater must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures equal to or more than 0. 5 psig. 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. 23 B As soon as '188' is displayed, release "Program" button and the display should read P2. 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. for LPG will result in insufficient degree rise to the hot water being used, and must be corrected. 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. [. . . ] Certain service labor allowances are available to PHCC member contractors, dependent on prior authorization by BBTNA. General BOSCH PRO water heaters are warranted by the Manufacturer (BOSCH) through BBT North America. BBT North America (BBTNA) will furnish a replacement heat exchanger and will furnish a replacement of any other part which fails in normal use and service within the applicable periods specified below, in accordance with the terms of this warranty. The BBTNA replacement will be warranted for the unexpired portion of the original warranty. This warranty will be valid only for water heaters in possession of the original purchaser as recorded on the warranty card. [. . . ]