User manual BOSCH GWH 260 PN

[. . . ] GWH 260 PN INDOOR MODEL Flow Modulated with Standing pilot Suitable for heating potable water only - Not approved for space heating purposes (Intended for variable flow applications with steady cold water inlet temperatures) GWH-260-PN-N GWH-260-PN-L 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. [. . . ] Cleaning pilot assembly Shut off gas supply to the heater using installer supplied manual gas shutoff. Locate pilot gas tubing mounted in the center of the burner assembly. At the base of the pilot gas tubing there is a retaining clip. Release pilot gas tubing from this clip. Push upwards on other end of pilot gas tubing to release it from burner mount. Remove brass hex headed pilot orifice from gas valve (located near base of pilot gas tubing). Soak orifice and pilot gas tubing in carburetor cleaner for 30 minutes. Dry off and reinsert orifice in gas valve. If heater is an LP unit, replace orifice. Reinstall the pilot gas tubing following removal instructions in reverse. Open gas supply and return heater to service. Caution: Do not ream or poke orifice as it will enlarge orifice opening. 5. 2 Water valve The water valve is the main control that tells the heater to fire. If the periodic maintenance is neglected, more costly damage may occur over time. Inspecting inlet water filter screen Shut off the installer supplied cold water isolation valve to the heater. If one is not installed, install before proceeding. Open the nearest hot water tap to drain the plumbing lines. Position a bucket under the heater's water valve assembly to catch any water that may drain from the heater. Remove the filter retaining pin located at base of water valve (see Fig. Remove the threaded bushing to access the cylindrical filter inside. Remove filter, clean with water and inspect for damage. If the filter is at all damaged, it should be replaced. Lubricating the water valve A more detailed instruction is available on our website at www. boschpro. com. [. . . ] 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. [. . . ]