53
6
+2
0
4
+0,5 0
10
±1
A
A
B
Fig. 38
A
Ignition electrodes
B
Ionisation electrode
1.
Check the electrodes for wear and contamination.
2.
Clean the electrodes with a small brush (not with a
wire brush) or sandpaper.
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 fix-
ing screws with 4.5 Nm.
Cleaning the heat exchanger heating surfaces
To safeguard the 10 year guarantee for the heat
exchanger, we recommend annual cleaning of both
heat exchangers (see "General Terms & Conditions"
and "Maintenance Checklist").
The flue gas heat exchanger is usually significantly
cleaner than the burner heat exchanger. Consequently,
the flue gas heat exchanger will need cleaning only to
the extent required by the contamination level of the
heating surfaces.
!
Please note
Scratches and other damage to the surfaces of
the heat exchanger that comes into contact with
hot gas can result in corrosion damage.
Never use brushes to clean the heating sur-
faces.
Brushing can cause deposits to become lodged
in the gaps between the coils.
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.
A
Fig. 39
1.
Use a vacuum cleaner to remove residues from
heating surfaces
A
inside the heat exchanger.
2.
If required, flush heating surfaces
A
with water.
3.
Check condensate drain and clean trap. See the
following chapter.
Removing the flue gas heat exchanger
Checking the heating surface contamination level
Steps 4 to 6 are not required for visual inspection. The
hydraulic lines can remain connected.
Carefully pull the flue gas heat exchanger forwards.
Removing the flue gas heat exchanger
Drain the secondary circuit before removing the flue
gas heat exchanger.
Commissioning, inspection, maintenance
Checking and adjusting the ignition and ionisation electrodes
5678 044 GB
Summary of Contents for D2RA
Page 113: ...113 Maintenance Checking the Vitotronic 200 H accessories cont 5678 044 GB Maintenance ...
Page 133: ...133 Parts lists Sorption module hydraulics cont 5678 044 GB Components ...
Page 136: ...136 0001 0002 0003 0004 0005 Fig 83 Parts lists Miscellaneous 5678 044 GB Components ...
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