HDG Navora 20, Operation Manual

Page: 64 / 80

7 Cleaning and servicing the heating system – Procedure
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23. Remove the two clip connectors (3).
24. Pull out the large guide crossbar (1) in an upward direction.
25. Pull out the cleaning turbulators on the four small guide crossbars
(2) in an upward direction.
26. Clean the tubular heat exchanger using the round cleaning brush.
27. Mount the cleaning turbulators in the reverse sequence.
28. Close the boiler in the reverse sequence.
29. Make sure that the cleaning shaft lid is closed properly.
✓
The cleaning system, the heat exchanger surfaces and the flue gas
flap have been cleaned.
C
LEANING THE FLUE GAS FAN
Figure 7/12 - Pulling out the cleaning turbulators
1
2
Important!
When cleaning the heat exchanger surfaces, always first push the
cleaning brush all the way down and through before you pull it up
again, so that the wire bristles of the brush are not bent.
Important!
✎
Observe the “Generally applicable safety instructions” in this
section.
Caution!
Risk of injury from automatically driven components
Working on the flue gas fan can lead to hand injuries due to the
moving parts.
Disconnect the boiler from the power mains when working on the
flue gas fan.