Cleaning The Heat Exchanger - Viessmann VITODENS 111-W Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Checking and adjusting the electrode
4
+0,5
Fig. 25

Cleaning the heat exchanger

!
Please note
Scratches to the surfaces of the heat exchanger
that come into contact with hot gas can result in
corrosion damage. Brushing can cause deposits
to become lodged in the gaps between the coils.
Never use brushes to clean the heating sur-
faces.
!
Please note
Prevent damage due to cleaning water.
Cover electronic components with suitable
watertight material.
Note
Discolouration on the heat exchanger surface is a nor-
mal sign of use. It has no bearing on the function and
service life of the heat exchanger.
The use of chemical cleaning agents is not required.
34
(cont.)
3. Check the electrode gaps. If the gaps are not as
specified or the electrode is damaged, replace the
electrode and gasket and align.
!
Please note
Tighten screws enough
to ensure the components do not suffer
damage and will function correctly.
A
Fig. 26
1. Use a vacuum cleaner to remove combustion resi-
dues from heating surface
exchanger.
2. Flush heating surface
3. Check condensate drain. Clean the trap: See the
following chapter.
of the heat
A
with water.
A