B Check the operation of all safety, adjustment and
control elements.
B Press the
display key - - The
"mower" operating mode is now activated.
after each disassembly!
B Always switch off the voltage
(fuses, LS switch) before
working on the electrical components.
B Check the expansion vessel and, if necessary, replace
the air cushion with approx. 1 bar.
B Order according to the spare parts list, specifying
their name and code.
B Remove the ignition electrode and the ignition electrode
Expansion vessel
B Wash the exchanger with a strong jet of water.
.
B Brush the slots and air vents on the injector nozzles
with a brush.
Domestic hot water pipes
dirty.
- for threads: HFt 1 v 5 (8 709 918 010).
B Check the heat exchanger if it is
Safety, adjustment and control elements
and keep it that way until
B Burner gasket needs to be replaced
- connect the pump to the domestic hot water
connections of the heat exchanger.
B Remove the pressure from the appliance.
Spare parts
B Close the gas supply valve.
B Remove the heat exchanger.
B Close the shut-off valves.
B Insert the probe probe as far as it will go into the flue
gas measuring nozzle and seal the hole.
B Disassembled gaskets and O-rings must be removed
B Remove the heat exchanger.
- for components in contact with water: Unisilkon
L 641 (8 709 918 413)
B The burner must be checked annually and, if
necessary, cleaned.
B Brush the electrode tips with a brush.
B Only use the following Vaseline:
ionization.
Maintenance
The heat exchanger
- use commercially available cleaners and an electric
limestone cleaning pump.
B Remove the temperature limiter (6) and the probe
burner
Danger: Gas leaks!
If the desired outlet temperature is no longer reached:
If the heat exchanger needs to be cleaned:
a pressure of max. 4 bar.
You have 15 minutes to make the
measurements. After that, the “mower”
operating mode is automatically deactivated
and returns to normal operation.
B Remove plug (234) from flue gas measuring
nozzle.
B Only original spare parts can be used.
flow temperature (36).
B Maintenance may only be carried out by a specialist
company authorized to do so.
B Replace the ionization electrode every 3 years.
Vaseline for maintenance
B Remove limescale deposits as follows:
B Empty the appliance.
B Measure CO, CO2 and flue gas temperature
values.
replaced with new ones.
B When the heat exchanger becomes more dirty, dip it in
the hot water containing the detergents with the slats,
then wash it thoroughly and rinse it.
If the burner needs to be cleaned:
B If the burner is heavily soiled with grease, slag, etc.,
disassemble it and soak it in water containing
detergents, then rinse.
Danger: electric shock!
B Correlate the preload pressure of the expansion
vessel with the static height of the system.
Checking the heat exchanger for leaks:
The key flashes and the display shows the flow
temperature.
31
8.2 Flue gas measurement
8.1 Revision works
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i
6 720 610 828 RO (02.01)
8 Maintenance
Machine Translated by Google
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