78
A
B
Fig. 72
1.
Undo two screws and remove fan
A
.
2.
Remove back draught safety device
B
.
3.
Check the damper and gasket of the back draught
safety device for soiling and damage. Replace if
necessary.
4.
Refit back draught safety device
B
.
5.
Refit fan
A
and secure with two screws.
Torque: 5.0 Nm.
Checking and adjusting ignition and ionisation electrode (gas condensing
module)
6
+2
0
4
+0,5 0
10
±1
A
A
B
Fig. 73
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 heating surfaces (gas condensing module)
!
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.
Commissioning, inspection, maintenance
Checking the back draught safety device
5775 636 GB
Summary of Contents for C3TB
Page 136: ...136 Troubleshooting Repairs gas condensing module cont 5775 636 GB Diagnosis ...
Page 143: ...143 Parts lists Heat cell assembly 5775 636 GB Components ...
Page 160: ...160 Parts not shown 0009 PCB IU100 B30 Parts lists Fuel cell assembly 5775 636 GB Components ...
Page 161: ...161 Parts lists Fuel cell assembly cont 5775 636 GB Components ...
Page 187: ...187 5775 636 GB ...
