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- Remove the heat exchanger and treat with a
commercially available descaler
Please note:
When reinstalling make sure the four rubber
gaskets are in the right position and the mounting
position is correct
When reinstalling pay attention to the inscription on
the heating water heat exchanger. Look underneath
(see photo)
- The reinstallation proceeds in reverse order, coat
O-rings with silicon grease
- When filling the boiler, proceed in accordance with
the corresponding chapter in these instructions.
Only fill after having cleaned the strainer in cold
water inlet
Checking the expansion vessel
- The test connection on the expansion vessel
is on the top, behind the draught hood
Replacing the expansion vessel
- Procedure same as with cleaning the heating water
heat exchanger and cleaning gas burner
- Undo fixing screws on expansion vessel, gas
supply line and heating water heat exchanger [11]
- Detach cables from the ionisation electrode [1]
and plug-in connection on the ignition electrode
on the gas combi valve
- Loosen upper fixing brackets (do not dismantle) [12]
- Remove fixing screw [13]
- Pull thermal bracket completely up and forward [14]
- Replace expansion vessel
- Reassemble the components in reverse order
56
Maintenance
Please note when reinstalled:
Look underneath the heating water heat
exchanger for inscription.
Fig.: View of dismantled heating water heat exchanger
Mounting bracket [14]
Fixing screw above [12]
Fixing screw
underneath [13]
Screw connection
Expansion vessel
Gas supply line [11]
3062347_0309
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