51
When the flue box lid is removed, the entire inside of the flue box is visible. The fume
extractor inlet, the 6 heat exchanger tubes, the automatic tube cleaning system and
the fume box lid can be seen. To remove the cleaning system, loosen the DIN 912
M6x20 screws that secure the inner shaft to the outer shaft and move it towards the
outer shaft.
Figure 41 - Inside the fume box
To remove the cleaning spring system, move the shaft out of the welded bracket on
the housing and pull the system upwards. The springs are 1m long, so before starting
this manoeuvre it is best to climb a ladder that allows you to easily remove the
springs without having to bend them.
Figure 42 - Removing the cleaning spring system