User guide

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9 Telescopic Flue - Length, Preparation and Installation
9.1 Flue Length and Restrictors
The maximum permissable horizontal ue length is 2.5 metres
plus the ue terminal assembly, this can be achieved by use
of the accessories, see diagram 9.3.
However should an additional 90º or 2 x 45º elbows be used
then the length MUST be reduced by 1 metre.
The diagram 9.1 shows the length achievable by using the kit
A2043600.
When extension pipes are used the ue 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 ue can be installed from inside the building, when
access to the outside wall face is not practicable.
The ue restrictor is supplied in the documentation pack, the
correct size is supplied for the boiler output:-
Betacom 24c - 83mmØ
Betacom 30c - 85mmØ
The flue restrictor must be fitted in the flue adaptor for,
concentric flue installations less than 1 metre and twin flue
installations less than 2 metres equivalent length.
Full instructions are provided in the documentation pack.
Horizontal Telescopic Flue
Diagram 9.1
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