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 im- portant 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.
2.9Inlet 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.
20
