79
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. 74
1.
Use a vacuum cleaner to remove combustion resi-
dues from heating surface
A
of the heat
exchanger.
2.
Flush heating surface
A
with water.
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.
Checking condensate drain and cleaning the trap (gas condensing module)
B
C
A
Fig. 75
1.
Check at the trap that the condensate can drain
freely.
2.
Pull off drain hose
A
.
3.
Pull off retaining clip
B
.
4.
Remove trap bottle
C
downwards.
5.
Clean the trap.
Commissioning, inspection, maintenance
Cleaning heating surfaces (gas condensing…
(cont.)
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 ...
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