7 Cleaning and servicing the heating system – Procedure
144
HDG M299/300/350/400 - Version 1 - en
©
HDG Bavaria GmbH 07/2008
5.
Check the cleaning shaft (3) and the cleaning system for any de-
posits.
6.
If necessary, remove deposits and dust with a suitable vacuum
cleaner.
7.
Close the cleaning shaft lid in the reverse sequence.
8.
Proceed with the remaining cleaning shafts in the same manner
described above.
9.
Deactivate the maintenance function.
✎
See section “Maintenance function” in this chapter.
✓
The cleaning of the cleaning shaft is completed.
C
LEANING
THE
VACUUM
PRESSURE
PIPE
FOR
THE
PRESSURE
SWITCHES
1.
Activate the maintenance function.
✎
See section “Maintenance function” in this chapter.
2.
Allow the fire in the heating system to burn out and cool down.
3.
Remove the upper cladding (1) by lifting it upward.
4.
Detach the hose from the vacuum pressure pipe (2).
5.
Inspect the vacuum pressure pipe (2) for dirt and dislodge it if nec-
essary with a wire or a compressor.
6.
Attach the hose to the vacuum pressure pipe (2).
Important!
✎
Observe the “Generally applicable safety instructions” in this
section.
Figure 7/13 - Cleaning the vacuum pressure pipe for the pressure switches
1
2
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