Buderus Logano plus GB402 Installation And Maintenance Instructions For Contractors page 38

10 Inspection and servicing
▶ Clean the heat exchanger gas flues horizontally and diagonally using
the cleaning blade.
▶ Clean the back section of the hot gas flues from below through the
condensate pan using the cleaning blade.
Fig. 52 Dry cleaning the heat exchanger
[1] Cleaning blade (available separately)
DANGER: Risk to life through escaping flue gas!
▶ During installation, look out for faulty gaskets and
ensure they are seated correctly. Replace faulty
gaskets.
▶ Replace the gaskets as described
( Chapter 10.13, page 42).
▶ Screw the cleaning covers back on.
2
Fig. 53 View of cleaning cover;
[1] 320 kW
[2] 395-620 kW
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6 720 815 234-01.1TT
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6720646293-01.1BU
Wet cleaning the heat exchanger
When wet-cleaning, use a cleaning agent appropriate to the level of
contamination (soot level or encrusted residues). The cleaning agent
must be suitable for aluminium!
▶ Clean the heat exchanger with water or a cleaning agent suitable for
aluminium (observe the instructions by the manufacturer of the
cleaning agent).
During wet cleaning, protect electrical components (fan,
gas valve etc.) against moisture and contamination.
1
Fig. 54 Wet cleaning the heat exchanger
Working on the heat exchanger during wet and dry cleaning
▶ Use a hose to flush any residues into the bucket or the condensate
pan.
▶ Clean the condensate pan with water.
▶ Clean the siphon with water.
DANGER: Risk to life through poisoning! Siphons not
filled with water can cause a risk to life through escaping
flue gas.
▶ Fill the siphon with approx. 2 litres of water.
▶ Re-install the siphon ( Chapter 6.2, page 17).
▶ Check the condensate hose between the boiler flue connection and
the siphon for free flow.
Logano plus GB402 – 6 720 820 700 (2018/01)