Inspection and maintenance
64 Installation and maintenance instructions ecoTEC plus 0020116700_01
12
12.4.2 Cleaning the heat exchanger
b
Caution.
Risk of damage from water spray.
If you fail to protect the electronics box
adequately, water can penetrate the box
during cleaning and may damage the elec-
tronics.
> Protect the folded down electronics box
against sprayed water.
> Remove the compact thermal module (¬section12.4.1).
2
3
4
1
12.5 Cleaning the heat exchanger
b
Caution.
Risk of damage to heat exchanger.
> You should neither loosen nor tighten
the four screws (1).
> Clean the heating coil (3) of the heat exchanger (4)
using water or if required commercially-available white
vinegar.
> Allow the vinegar to act on the heat exchanger for 20
minutes.
> Rinse away any loose dirt with a sharp jet of water or
use a plastic brush.
> Do not point the water jet directly at the insulating sur-
face
(2) on the back of the heat exchanger.
The water flows out of the heat exchanger through the con-
densate siphon.
12.4.3 Checking the burner
1
12.6 Checking the burner
As the burner (1) is maintenance-free, it does not require
cleaning.
> Check the surface of the burner for damage.
> If necessary, replace the burner.
12.4.4 Cleaning the condensate siphon
a
Danger!
Risk of death caused by improper main-
tenance.
If you operate the boiler with an empty
condensate siphon, flue gas can escape into
the room air.
> Top up the condensate siphon after each
cleaning session.
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