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7.3
Standard inspection and maintenance operations
7.3.1
Preparation
Fig.53
Full load test
11:20
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7734325 - v.07 - 22092022
For a service, always perform the following standard inspection and
maintenance operations.
Carry out the following steps before commencing inspection and
maintenance activities:
A
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B
AD-3000941-03
1. Set the boiler to full load until the return temperature is around 65°C,
to dry the heat exchanger on the flue gas side.
2. Check the water pressure.
The minimum water pressure is 0.8 bar. The recommended water
pressure is between 1.5 bar and 2.0 bar.
2.1. If necessary, top up the central heating system.
3. Check the ionisation current at full load and at low load.
The value is stable after 1 minute.
3.1. If the value is lower than 3 µA, clean or replace the ionisation
and ignition electrode.
4. Check the condition and tightness of the flue gas outlet and air supply
system.
5. Check the combustion by measuring the O
flue gasses.
Important
This appliance is suitable for category I
Hydrogen gas (H
). Due to variations in the H
2
O
/CO
percentage can vary over time. (For example: a
2
2
percentage of 20% H
1,5% of O2 in the flue gasses)
A significant adjustment of the gas valve may be needed.
Adjustment can be done using the standard O
the gas used.
See also
Chimney sweep menu, page 13
Performing the full load test
1. Select the tile [
].
The Change load test mode menu appears.
2. Select the test Medium power.
A Change load test mode
B Medium power
The full load test starts. The selected load test mode is shown in the
menu and the icon
3. Check the load test settings and adjust if necessary.
Only the parameters shown in bold can be changed.
Checking/setting values for O
1. Set the boiler to full load.
2. Measure the percentage of O
3. Compare the measured value with the checking values in the table.
/CO
percentage in the
2
2
containing up to 20%
2H
2
in the gas can lead to an increase of
2
appears in the top right of the screen.
/CO
at full load
2
2
/CO
in the flue gases.
2
2
7 Maintenance
percentage, the
/CO
values of
2
2
57
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