Inspection and maintenance
69
Greenstar FS/Combi FS – 6 720 810 590 (2020/04)
15.1.6 Heat exchanger block inspection and cleaning
NOTICE:
Damage to the coating of the heat exchanger.
▶ Cleaning of the heat exchanger should not be necessary until five
years after the initial commissioning.
▶ Only use a Bosch cleaning blade and Bosch cleaning brush.
▶ Only clean heat exchanger in case if soiling is clearly visible.
▶ Remove the inspection cover and any sheet metal insert below, if
installed.
▶ Determine degree of soiling of the heat exchanger through visual
inspection.
If mechanical cleaning is required:
For cleaning the heat exchanger, use Bosch main heat exchanger
gaskets, the heat exchanger brush and the heat exchanger cleaning
blade which are available as spare parts.
▶ Remove the condensate trap (steps 1 and 2) and place a suitable
container underneath.
Fig. 91 Removing the condensate trap
▶ With the cleaning blade, clean the heat exchanger block from the
bottom to the top.
Fig. 92 Cleaning the heat exchanger with the cleaning blade
▶ Clean the heat exchanger block with the brush from top to bottom.
Fig. 93 Cleaning the heat exchanger with the cleaning brush
▶ Remove burner (Section 15.1.5 “Burner servicing”).
6 720 641 933-93.1o
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6 720 641 933-71.1O
6 720 612 563-14.1O
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