User manual BOSCH GWS 8-125

[. . . ] In the Commonwealth of Massachusetts this product must be installed by a licensed plumber or gas fitter. Upon completion of the installation, these instructions should be handed to the user of the appliance for future reference. What to do if you smell gas · Close gas valve. · Do not try to light any appliance. [. . . ] Loosen the two set screws at the bottom of the water valve where it connects to the gas valve. If the set screws are seized, STOP and call Bosch tech support before proceeding. Forcing and snapping seized set screws may cause irrevocable damage to the water valve and gas valve assemblies. Remove the water valve by pulling it to the right. Separate the two halves of the water valve by removing the five screws on the left side of the water valve. Apply lithium or faucet & valve grease to the pushrod and oring. Inspect the venturi and clean if necessary. Rebuilding the water valve Several parts within the water valve should be replaced every 3 to 5 years depending on water quality and usage. The parts list and instructions can be found on our website at www. boschpro. com. Failure to rebuild the water valve can result in decreased performance or damage to the heater. The GWS 8-125 requires periodic maintenance. The below time maintenance intervals should kept the unit operating for many years. 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. 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. Disconnect the inlet water pipe going to the back of the water valve. Disconnect the water pipe leading out of water valve to the heat exchanger. Do this by removing the retaining 6 720 608 126 17 Maintenance and service 5. 4 Main burners The main burner flames should be blue, with a more intense blue cone in the center core. Yellow flames could be a sign of wrong size gas orifices or dirty burners, a blockage on the heat exchangers fins. [. . . ] control knob Draft Diverter Exhaust pipe union Ø128 Angle bracket Trade mark badge Heat exchanger Cold water pipe Main burner NG Main burner LP Connector Piezo clip (x10) Sparking plug Pilot gas pipe Tube (x10) Pilot screen Gas valve NG Gas valve LP Throttle housing Washer (x10) Pilot injector LP Pilot injector NG Pilot valve Poppet valve head (2) NG Poppet valve head (3) LP Electromagnet Electromagnet cap Valve operation housing Guide plate Gas pressure regulator LP Gas pressure regulator NG Water valve Watervalve pushrod (10x) Diaphragm (A) Inlet water connection Selector screw Piezo igniter Fixing bracket Ignition lead Thermocouple Set of cables Washer (x10) Heat exchanger washer Threaded bushing Connector Water Filter Outlet Hose Water connection clip Plunger Volumetric water governor ECO Temperature Limiter Flue gas safety limiter Venturi Hot water pipe Gas supply pipe Cover Reference 8 705 431 245 0 8 705 506 817 0 8 702 000 295 0 8 705 505 438 0 8 705 504 150 0 8 708 003 190 0 8 701 103 135 0 8 705 406 330 0 8 700 715 036 0 8 708 120 504 0 8 708 120 617 0 8 705 209 062 0 8 701 201 019 0 8 748 107 089 0 8 700 707 369 0 8 740 609 002 0 8 700 507 067 0 8 707 021 395 0 8 707 021 396 0 8 705 502 067 0 8 701 004 044 0 8 708 200 326 0 8 708 200 327 0 8 708 500 301 0 8 708 500 358 0 8 708 500 359 0 8 707 201 028 0 8 703 305 283 0 8 708 008 069 0 8 701 000 380 0 8 707 406 083 0 8 707 406 084 0 8 707 006 286 0 8 703 204 051 0 8 700 503 079 0 8 700 306 110 0 8 708 500 332 0 8 708 108 051 0 8 701 302 181 0 8 704 401 040 0 8 707 202 083 0 8 704 401 332 0 8 701 004 043 0 8 700 103 658 0 8 700 306 148 0 8 700 306 187 0 8 700 507 059 0 8 700 703 139 0 8 701 201 020 0 8 703 502 039 0 8 705 705 034 0 8 707 206 017 0 8 707 206 132 0 8 707 206 241 0 8 708 205 279 0 8 700 715 178 0 8 700 715 351 0 8 705 500 105 0 Table 5 26 6 720 608 126 Fifteen Year Limited Warranty 9 Fifteen Year Limited Warranty costs associated with service, removal or re-installation of the original water heater or a replaced water heater. 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. [. . . ]