Cleaning The Heat Exchanger Assembly - Bosch Condens 8300i W Installation And Maintenance Instructions Manual

9.16

Cleaning the heat exchanger assembly

Clean the heat exchanger with the cleaning brush set, which is available
as a spare part. Using chemical additives for cleaning on the heating gas
side is not permitted.
▶ Remove the condensate trap ( chapter 9.17, page 46) and place a
suitable container underneath.
▶ Remove the cover at the heating block.
▶ Clean the heating block with the cleaning knife from top to bottom.
Fig. 56 Cleaning knife
▶ Clean the heating block with the brush from top to bottom.
Fig. 57 Cleaning the heating block with a brush
▶ Remove the burner ( chapter 9.9, page 42).
Condens 8300i W – 6721841531 (2022/10)
▶ Purge the heating block with water from the top.
Fig. 58 Purging the heating block
▶ Clean the condensation catch pan (with reversed brush).
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Fig. 59 Cleaning the condensation catch pan
▶ Purge the heating block with water from the top.
▶ Install the burner.
▶ Clean the condensate trap connection.
▶ Install the condensate trap.
▶ Re-fit the cover to the heating block. Tighten the screws with 5.5 +
3 Nm.
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Inspection and maintenance
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