5
6
7
4
5
6
7
• Disconnect the electrical connections from the fan (5)
• Turn the left (6) and right (7) clamp bars a quarter turn with a 4mm
Allen 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 upside 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)
The following operations must be performed carefully in relation to the vulnerability of the non return valve.
• After removing the burner cassette (8) the non return valve (12) becomes visible. Check that the non return valve
entire circumference closes / seals completely. The valve should be able to move freely from fully open to fully
closed. Replace the non return valve if the valve does not seal properly.
• Replace the gasket (9) between the burner (8) and upper casing (10)
• Replace the gasket (11) between the upper casing (10) and exchanger
!
11 12
8
9
10
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