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B Clean hot gas baffles with the cleaning brushes.
B Insert hot gas baffles into hot gas flues
(
Fig. 30,page 23 and Fig. 31 and Fig. 32,page 24).
B Seal clean-out covers and burner door. Tighten
screws evenly. Hook the front side panels back in
place. Put sealing plug back in place if necessary.
B Fold the rear section lagging down and pull together
under the flue outlet using tension springs.
B Put the lower boiler panel back in place.
7.3.2
Wet cleaning (chemical cleaning)
When wet cleaning, use a cleaning agent commensurate
with the degree of soiling (encrustations or soot).
Proceed in the same sequence as if cleaning with
cleaning brushes (
see Chapter 7.3.1, page 40).
Follow instructions for the cleaning agent
and cleaning equipment.
In some circumstances you may need to
proceed differently from the method
described here.
B Cover the control unit with foil to prevent spray from
entering it.
B Spray cleaning agent evenly into the hot gas flues.
B Close burner door and start the heating system.
B Heat the boiler water temperature to at least 70 °C.
B Take the boiler out of operation.
B Allow boiler to cool; open burner door.
B Brush out the hot gas flues.
UNI 7000 F
Heating system inspection and maintenance | 43
6 720 803 940 (2010/03)
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