Main Heating Main Heat 12, Installation & Service Manual

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This dimension to be known as (Z).
i.e. (Z) = wall plate to wall + wall thi 250
5. Take the flue and mark off (Z) from the terminal end as indicated ( Fig. 27 ).
Check your dimensions .
The flue tubes are fixed together. Cut through both tubes whilst resting the flue on the semi-circular packing pieces. Deburr both tube ends.
IMPORTANT: Check all measurements before cutting.
NOTE: When cutting ensure the cut does not interfere with the inner flue support bracket ( Fig. 27a ).
Fig. 26
Fig. 27