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28 | Inspection and maintenance
Uni 3000 F6 720 812 900 (2014/10)
7.3 Cleaning the boiler
7.3.1 Cleaning heating surfaces and turbulators with a cleaning
brush
Remove turbulators [4] from secondary heating pipes [1].
Clean turbulators [4].
Push the bristle part of the cleaning brush [3] right through the
secondary heating pipe until the bristles emerge at the other end of
the pipe. The internal surface of the pipe must be cleaned
thoroughly.
Clean the heating surfaces in combustion chamber [2] and the
heating surfaces in secondary heating pipes [1] with cleaning
brush [3].
Fig. 28 Cleaning the heating surfaces
[1] Secondary heating pipes
[2] Combustion chamber (heating surfaces of combustion chamber)
[3] Cleaning brush
[4] Turbulator
7.3.2 Cleaning the flue gas collector
To be able to remove combustion residues from the flue gas collector,
first remove the cleaning cover. The cleaning cover is located on the rear
of the boiler [2].
Fig. 29 Opening the cleaning cover of the flue gas collector
[1] Back panel
[2] Cleaning cover
Remove nuts and washers from the cleaning cover [2].
Remove the cleaning cover of flue gas collector [2].
Remove the loosened combustion residues from the combustion
chamber ( Fig. 28), the hot gas flue and the flue gas collector as
well as the condensate hose.
7.3.3 Inserting turbulators
CAUTION: Risk of injury through falling parts!
Prior to opening the doors, ensure that the hinge pin
is correctly fitted in the burner door and secured with
a nut.
WARNING: Risk of system damage from using incorrect
cleaning equipment.
If cleaning with a brush, use only genuine cleaning
brushes from the manufacturer. Brush included in
scope of delivery.
6 720 806 032-30.1ITL
4
2
3
1
NOTICE: Risk of system damage from improperly
inserted turbulators.
Incorrectly inserted turbulators impede the flow of flue
gas and lead to overheating of the boiler front.
Insufficiently secured turbulators will drift out of the
secondary heating pipes during operation and burn up.
Align turbulators correctly.
Check that the turbulators are secured in the
secondary heating pipes. It must not be possible to
pull the turbulators out of the secondary heating
pipes easily.
6 720 806 032-31.1ITL
2
1
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