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Hersteller: GE Dateigröße: 315.7 kb Dateiname: Unterrichtssprache:

The main burner will ignite as soon as a reduction in water temperature is sended by the thermostat. The main burner will shut down as soon as the preset temperature is achieved. At high water temperatures there is more scale buildup in the appliance. It is for this reason that it is recommended to place the temperature control knob in position of 60 °C as the accumulation of scale will be reduced. Figur 8 Removing and replacing the inner door. 1) 2) 3) 4) Burner bracket Inner door Clip Mainburner 5) 6) 7) Skirt ring Outer casting Base tray 2.7 Converting to another type of gas For conversion of the appliance from natural gas to another type of gas, or visa versa, it is necessary to exchange the pilot injector and the main injector. The conversion may only be executed by a qualfied competent person. Procedure: 1. Shut the heater down. Close the main inlet gas valve and switch off the electricity supply at the main switch; 2. Remove the burner assembly; 3. Replace the injectors with the correct injectors from the conversion set. (see table below). Remark: -When conversion of the appliance from natural gas to another type of gas, fix the screw on the gas block of the burner pressure control as far as the stop. -When conversion of the appliance from another type of gas to natural gas, then the right burner pressure should be adjust. 2.8 Maintenance To ensure safe and efficient operation of the water heater it is recommended that it is cleaned and serviced at least once a year by a qualified competent person. 2.8.1 Magenesium anode The life cycle of the anode is determined by the quality and the quantity of the water flowing through the water heater. It is therefore recommended that the anode be inspected and replaced if necessary at least once a year. 1. Close the stop cock in the cold water supply pipe; 2. Open the nearest hot water tap in order to allow the pressure to drop from the water heater and the pipes; 3. Slacken the anode with a fitting wrench; 4. Check the anode and replace it if it has been reduced in diameter by 60% or more at any point on its lenght; 5. Check for water leaks. If is necessary to replace the anode it should be replaced by one of the same type. The type of anode required can be detemined on the basis of the type of the appliance and the serial number. unit BTI 85 BTI 100 G20 G30 G31 G20 G30 G31 Supply pressure mbar 20 30 37 20 30 37 Burner pressure mbar 11.5 30 37 10.0 30 37 Diameter main injector mm 3.90 2.30 2.30 4.50 2.35 2.35 Diameter pilot injector mm 0.56/ 0.41 0.23 0.23 0.56/ 0.41 0.23 0.23 2.8.2 Cleaning 1. Close the gas supply and demount the burner after it has cooled down 2. Disconnect the burner assembly from the gas control 3. Remove the complete burrner assembly 4. Clean the burner with a soft brush 5. Check the pilot burner and clean it if so required 6. Check the combustion chamber, flue tube and flue baffle and clean these if required After cleaning of the pilot- and main burner the operation of these should be checked. If necessary the burner pressure should be reset. 2.8.3 Decalcification Formation of lime scale depends on the quality and quantity of the water used. In addition higher water temperatures lead to more deposit in the appliance. A temperature setting of 60° C is recommended in order to keep the calcification at a low level. Decalcification should be attempted with the proper means. For extensive information a decalcification instruction is available. 2.8.4 Spare parts To be able to order spare parts it is important to note the type of appliance as well as the serial number of the appliance. Based on this information the data concerning the spare parts can be determined. 2.9 Inlet combination Not applicable in U.K. and Ireland. 2.10 Gas smell Immediately shut the main gas tap. Do not light any fire or switch o any lights, do not use any electrical switches or alarm bells. Open windows. Thoroughly inspect all gas connections and, if the gas smell persists, alert the local gas company and/or your installer. 2.11 Condensation If the appliance is filled with cold water or if the hot water consumption is very high, condensation of flue gasses will occur on the cold surfaces of the combustion chamber and the flue tube. The water drops will fall on the burner and cause a sizzling noise. This is a normal phenomenon that will disappear as soon as the appliance reaches its normal operating temperature. Important warning The applicance should never be taken into operation with a closed cold water supply! Provision should always be made for expansion. 3. FOR THE USER 3.1 Commisioning Warning Installing and commissioning of this water heater should only be carried out by a qualified competent heating engineer. 3.1.1 Filling the water heater 1. Close the drain tap; 2. Open the cold water tap to the water heater and open all taps where hot water can be drained for de aeration. The water heater is filled as soon as cold water flows from all taps; 3. Close all hot wat...

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