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2.5 Temperature regulation
The appliance is under water supply
pressure (maximum 8 bar). The amount
of cold water that is added is equal to
the amount of hot water used. The gas
control block automatically regulates the
gas supply. 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.
2.6 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 qualed 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, x 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.
2.7 Maintenance
To ensure safe and efcient operation of
the water heater it is recommended that
it is cleaned and serviced at least once a
year by a qualied competent person.
2.7.1 Magenesium anode
The life cycle of the anode is determined
by the quality and the quantity of the
water owing 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 tting
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.
2.7.2 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, ue
tube and ue bafe 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.
19


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