7.5
Specific maintenance operations
If the standard inspection and maintenance operations have revealed
the necessity to carry out additional maintenance work, proceed as
follows, depending on the nature of the work:
7.5.1.
Replacing the ionisation/ignition electrode
Replace the ionisation/ignition electrode in the following cases:
4
Ionisation current <3 µA.
4
Electrode worn.
If replacement is necessary, proceed as follows:
1. Remove the cord from the ionisation/ignition electrode on the
ignition transformer.
2. Unscrew the 2 screws and remove the ionisation/ignition
electrode.
3. Replace the ionisation/ignition electrode.
7.5.2.
Cleaning the plate exchanger (domestic hot
water end) and the water filter cartridge
Depending on the water quality and the operating mode, limescale
deposits may form in the plate exchanger and the water filter
cartridge. Periodic descaling may therefore be necessary. As a
general rule, a periodic inspection, along with cleaning, if necessary,
is sufficient. The following factors may affect the periodicity:
4
Water hardness.
4
Composition of the limescale.
4
Number of hours' operation of the boiler.
4
Draw-off rate.
4
Domestic hot water set point temperature.
T001528-A
1
2
3
7. Checking and maintenance
MCA 15 - MCA 25 MCA 25/28 MI
106
29/04/2010 - 300022146-001-B
