Red Heating FRESIA 70 AIR 9 S1 Installation And User Manual page 26

20-CLEANING
After cleaning as described above and before reassembling the cast iron firebox panels, it is advisable to vacuum the ash pan and brazier
zone.
Also vacuum in the top part, under the front grille, to remove any accumulated dust. Then thoroughly clean the lower exchanger, replace
any gaskets if needed, and reassemble.
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