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. [. . . ] Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water. 50 Setting the water temperature The desired temperature of the hot water can be adjusted on the front control panel of the heater. The GWH C 800 ES has an electronically controlled gas valve that modulates the burner input in response to both varying hot water flow rates and/or changes in any incoming and outgoing water temperatures. Note: The water heater, running at minimum BTU, may still achieve temperatures above the desired set temperature. Low flowing fixtures are the leading cause of this type of temperature overshoot. To combat this symptom, clean fixtures or replace with higher flowing ones if necessary. Solar mode The water heater will not ignite if inlet water temperature exceeds the set temperature on the appliance. In this condition, the solar mode indicator will show on the LCD display. 47, page 28. 5. 3 On Power B To start the appliance press the On/Off button. Fig. 49 Off B To shut down the appliance press the On/Off button again. Fig. 51 6 720 608 643 29 Operation instructions 5. 5 Use of optional remote control accessory (part no. TSTAT2) B press reset button firmly in order to return heater to normal operation. Fig. 77, component 13) and the temperature selector buttons on the front of the water heater operate identically. 77, component 16) is required when programming the remote control with this heater. 5. 8 Program button i 5. 6 NOTE: up to 6 remote controls can be programmed for one single water heater, each with a range distance of 98 ft (30 m). Fig. 56 "Program" key 5. 8. 1 Memorizing selected temperature or to select desired B Press buttons temperature. Operation B When a hot water tap is opened, main burner ignites and LCD displays indication . B Hold "Program" button for 3 seconds to save temperature. Using "Program" function In order to select memorized temperature B Press "Program" key. Fig. B Power bar indicates power percentage in use. LCD shows pre-memorized temperature, which is now the hot water selected temperature. 5. 9 Locked condition 5. 7 Reset button This condition is only valid for appliances with one or more remote controls installed. If the LCD shows the error symbol do not shut off power or unplug the heater. 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. [. . . ] This way you have the precise water flow needed (mixing cold water to regulate temperature will increase the water flow with consequent waste of water). 58 6 720 608 643 Limited Warranty 14 Limited Warranty Service Labor Costs This warranty does not cover any labor costs associated with service, removal or re-installation of part(s). Additionally, this warranty does not cover any labor costs associated with service, removal or re-installation of the original water heater or a replaced water heater. General BOSCH PRO tankless 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. [. . . ]