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- Remove the velcro from the silencer and remove the silencer (1);
- Unscrew the coupling (2) of the gas block and the coupling on the venturi (3) and remove the gasline (4);
- Replace the gaskets of the gasline (O-ring) with new ones;
- Disconnect the electrical connections from the fan (5);
- Turn the left (6) and right (7) clamp bars a quarter turn with the hex key and pull these out in a forward
motion. Mind the direction of rotation (red control cams);
- Now lift the complete fan unit (5) with the upper tray of the heat exchanger and remove it in a forward
motion;
- Turn the unit up side down and remove the burner cassette (8) from the ventilator unit;
- Check the burner cassette for wear and tear, pollution and any breakages. Clean the burner cassette with
a soft brush and vacuum cleaner. In the case of breakages, always replace the complete burner cassette
(8);
Figure 16.c
CLOSED
HEX KEY
OPEN
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