User manual BOSCH GWH C 800 ES

[. . . ] GWH C 800 ES (GWH C 800 CTDR EFS) Temperature Modulated with Electronic Ignition Suitable for heating potable water - Not approved for space heating purposes (Intended for variable flow applications) GWH C 800 ES - Natural Gas GWH C 800 ES - 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 vapors 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. [. . . ] Record the error code on LCD and consult "Problem solving" section 8. 1, page 40. Fig. 57 Locked condition Whenever LCD shows the temperature setting cannot be adjusted because the appliance is in use by a user which already selected a different temperature. Appliance will be automatically unlock 5 minutes after closing hot water tap. Fig. 54 After following instructions "Troubleshooting" section, indicated in 30 6 720 608 643 Maintenance and service 6 Maintenance and service Warning: Always shut off the electrical power supply, shut off the manual gas valve and shut off the water valves whenever servicing. Caution: B Check and clean the complete water heating system once a year. B Carry out a maintenance overhaul if necessary. Immediately repair defects to avoid damage to the system. Inlet Water Filter · Verify the inlet filter screen is clean and undamaged. The inlet water filter is located between the ¾" cold water inlet fitting on the right side of the appliance, and the water valve (See Fig. Close installer supplied water shutoff, carefully lift the water valve, then rotate back. Remove filter, clean and or replace if damaged. Descaling · In areas where the water supply has a high mineral content, the heat exchanger should be flushed with a descaling solution. Scale build up will shorten the life of the water heater and damage resulting from is not covered under warranty. Refer to section 6. 3 for detailed instructions on descaling the heat exchanger. Fin Coils · Inspect heat exchanger fincoil for soot build-up or blockage. To access fincoil, consult service bulletin at www. boschpro. com. If there is evidence of soot build-up or blockage, the heat exchanger should be removed by a professsional and cleaned thoroughly. Condensate trap · Check water level in the condensate trap, see Fig. · If appliance is out of service for more than 10 days, fill as described on page 14. · Check for debris and clean if needed. Annual maintenance table Every year 1. Inspect venting system Inspect heat exchanger Inspect burner Inspect condensate trap Inspect water filter X X X X X Table 14 Annual maintenance 6. 1 Annual maintenance (To remove front cover, see page 6. ) Venting System · Venting system - inspect inside of flue pipe for any blockage or restriction. Observe burner flames during heater operation. [. . . ] 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. 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 in an approved domestic hot water recirculation application, this heat exchanger warranty is limited to five (5) years from date of original installation and operation. [. . . ]