20
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 Inspection of the internal
waterside surfaces
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.
2.9
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.
2.12 Important warning
The applicance should never be
taken into operation with a closed
cold water supply!
Provision should always be made
for expansion.
