Glow-worm Ultracom cxi - Manual (Page 22)

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10.3 REAR Flue
If a wall thickness is between 203mm min. to 413mm max.
then the flue can be used without extensions.
With the flue elbow temporarily fitted, measure the distance
from the outside wall to the butt joint, see diagram 10.4. If
the measurement ‘Y’ exceeds 525mm, then the appropriate
length of extension pipe is required.
If the dimension is less than 315mm DO NOT cut the flue, it
can project to a maximum of 600mm, refer to diagram 10.5. If
this is not desirable then a Standard flue MUST be used and
cut to length.
Diagram 10.4
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Diagram 10.5
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10 Telescopic Flue - Length, Preparation and Installation
Diagram 10.6
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