Checking And Adjusting The Ignition And Ionisation Electrodes; Cleaning The Heating Surfaces; Checking The Condensate Drain And Cleaning The Siphon - Viessmann Vitodens 222-F Installation And Service Instructions For Contractors

Checking and adjusting the ignition and ionisation electrodes

+2
6
0
A
Fig. 28
Ignition electrodes
A
Ionisation electrode
B
1. Check the electrodes for wear and contamination.
2. Clean the electrodes with a small brush (not with a
wire brush) or sandpaper.

Cleaning the heating surfaces

!
Please note
Scratches to the surfaces of the heat exchanger
that come into contact with hot gas can result in
corrosion damage.
Never use brushes to clean the heat
exchanger.
!
Please note
Brushing can cause deposits to become lodged
in the gaps between the coils.
Never use brushes to clean the heat
exchanger.
A
Fig. 29

Checking the condensate drain and cleaning the siphon

Flue gas cascade:
Clean the trap in the flue gas header as well.
+3
5
0
A
Commissioning, inspection, maintenance
10
±1
B
3. Check the electrode gaps. If the gaps are not as
specified or the electrodes are damaged, replace
the electrodes together with new gaskets and
adjust them as required. Tighten the electrode fixing
screws with 4.5 Nm.
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.
1. Use a vacuum cleaner to remove combustion resi-
dues from heating surface
exchanger.
2. Flush heating surface
A
3. Check condensate drain and clean trap. See the
following chapter.
4. Flush the heating surface again with water. This will
also fill the trap with water.
of the heat
A
with water.
37