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Inspection and maintenance
Uni Condens 8000 F – 6720867056 (2016/10)
36
If you do not push the whole bristle part of the cleaning brush right
through the secondary heating pipe, you will find it very difficult to pull
the brush back out of the pipe.
Push the bristle part of the cleaning brush right through the
secondary heating pipe until the bristles emerge at the other end of
the secondary heating pipe.
Clean the secondary heating pipes with a brush ( fig.
40
, page
36
).
Remove all loose combustion residues from the combustion chamber
( fig. 38, [1], page 35), the hot gas flues and the reversing
chamber ( fig. 39, [1], page 35).
Fig. 40 Cleaning the flue gas collector
[1] Cleaning brush
10.3.4 Replacing the flue gas collector gasket
Replace the gasket in the flue gas collector cover during the annual
service.
Remove the old gasket and adhesive residues.
Trim the new gasket.
Affix the new gasket directly to the edge of the flue gas collector.
Allow abutting edges to overlap.
Cut off abutting edges at an angle of 45°.
Press diagonally abutting edges together leaving no gap.
10.3.5 Fitting the covers to the flue gas collector and reversing
chamber
DANGER:
Risk of poisoning through escaping gases.
Flue gas can escape during operation if the flue gas collector and
condensate drain pipe are not correctly sealed.
Carefully seal the flue gas collector with its inspection cover and the
condensate drain pipe with the siphon and hydraulic seal.
Check the cover gasket for damage and replace if required.
Position the flue gas collector cover.
Tighten the nuts with a torque of 15 Nm.
Fit the reversing chamber cover and secure tightly with a torque of
25 Nm.
Secure lagging mat.
Mount the burner.
Mount the front cover.
Restart the heating system.
10.3.6 Wet-cleaning the boiler
NOTICE:
System damage through moisture in the control unit.
If moisture enters the control unit, it will be damaged. Never allow any
spray to enter the control unit.
Ensure that you only spray cleaning agent onto the heating surfaces
of the hot gas flues and the combustion chamber.
NOTICE:
System damage through cleaning agents in connected components!
If liquids displaced by the cleaning agents are channeled through
connected components (e.g. siphon, neutralisation system, etc.), these
components may become inoperable or be damaged.
Protect or remove connected components.
For wet cleaning (chemical cleaning):
Follow the instructions and safety precautions of the cleaning device
and agent.
Ensure that the cleaning agent is chloride-free.
Observe the cleaning agent safety instructions.
When wet-cleaning, use a cleaning agent appropriate for the level of
contamination.
For wet cleaning, proceed according to the manufacturer's
instructions.
Liquid cleaning residues can be drained off through the condensate
drain pipe on the flue gas collector.
Disconnect the heating system from the power supply.
Close off the fuel supply.
Disconnect the neutralisation system and siphon prior to wet
cleaning.
Cover the control panel with foil to prevent spray from entering it.
Clean the boiler according to the instructions of the cleaning agent
manufacturer.
1
0010014761-001
36


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