CONTINENTAL EDISON BX2-E-C6E6D01 Guide D'utilisation page 45

Step 4.Insert the lower chimney bracket into to
lower chimney as below image.
Step 5.Install the lower chimney on the appliance,
and mark the holes position on the wall.
Step 6.Remove the lower chimney, then drill holes
in the wall: hole with diameter Φ4 mm screw.
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