Baxi Barcelona System Installation And Servicing Instructions page 20

8.0 Installation - Page 20
8.6 Fitting The Flue
Before fitting the flue, check the condensate drain
integrity (see section 8.5).
IMPORTANT: The flue should always be installed with a
o
3 (1 in 20) fall from terminal to elbow, to allow
condensate to run back to the boiler.
HORIZONTAL FLUE
1. The standard flue is suitable for lengths 270mm minimum
to 800mm maximum (measured from the edge of the flue
elbow outlet).
Rear Flue: maximum wall thickness - 630mm
Side Flue: maximum wall thickness - 565mm (left or right)
2. For rear exit - measure the wall thickness (Fig. 26) and
to this dimension add 245mm. This dimension to be known
as (X).
i.e.
(X) = wall thickness + 245mm
3. Take the flue and mark off (X) from the terminal end as
indicated in the diagram (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.
4. For left hand exit - measure the distance from the edge
of the wall plate to the inner face of the wall (Fig. 26) and to
this dimension add the wall thickness + 275mm. This
dimension to be known as (Y).
i.e.
(Y) = wall plate to wall + wall thickness + 275mm
5. Take the flue and mark off (Y) from the terminal end as
indicated (Fig. 27).
6. For right hand exit - measure the distance from the
edge of the wall plate to the inner face of the wall and to this
dimension add the wall thickness + 350mm. This dimension
to be known as (Z).
i.e.
(Z) = wall plate to wall + wall thickness + 350mm
7. 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.
When cutting ensure the cut does not interfere with the
inner flue support bracket (Fig. 27a).