Standard horizontal flue, 6 flue length – Glow-worm Betacom C User Manual
Page 25

25
Standard Horizontal Flue
9.6 Flue Length
The maximum permissable horizontal flue length is 5.6 metres
for Betacom 24c and 4.6 metres for Betacom 30c, this can be
achieved by use of the accessories, see diagram 9.12.
However should additional 90º or 2 x 45º elbows be used then
the length MUST be reduced by 1 metre.
The diagram 9.10 shows the length achievable by using the
kit A2043400.
When extension pipes are used the flue system must be
designed to have a continuous fall to the boiler of at least 2.5º
44mm/metre to allow condensate to run back into the boiler
and out via the condensate drain.
The flue can be installed from inside the building, when
access to the outside wall face is not practicable.
9 Standard Flue - Length, Preparation and Installation
Diagram 9.10
202.5
477.5mm
477.5mm
202.5
20mm
15533
14475
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