Specific Maintenance Operations; Replacing The Ionization/Ignition Electrode; Cleaning The Plate Exchanger (Domestic Hot Water End) And The Water Filter Cartridge - REMEHA Calenta 25s Installation And Service Manual

Calenta 25s - 28c - 35s - 40c
7.4

Specific maintenance operations

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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:
7.4.1.
Replace the ionization/ignition electrode in the following cases:
4 Ionization current <3 µA.
4 Electrode worn.
4 Electrode available in the maintenance kit.
If replacement is necessary, proceed as follows:
1. Remove the cable from the ionization/ignition electrode on the
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ignition transformer.
2. Unscrew the 2 screws and remove the ionization/ignition
electrode.
3. Replace the ionization/ignition electrode.
T001528-A
7.4.2.
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.
CAUTION
After maintenance operations, fill in the corresponding
checklist in the maintenance log provided .

Replacing the ionization/ignition electrode

Cleaning the plate exchanger (domestic hot
water end) and the water filter cartridge
7. Checking and maintenance
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