Baxi Combi 130 HE Installation & Servicing Instructions Manual page 22

Wall Thickness
3°
(1 in 20)
X
Fig. 21
Waste
Fig. 22
22
Support Bracket
360° Orientation
Edge of Support Bracket
Y
to Wall
Wall Thickness
(Y) = Left Exit
(Z) = Right Exit
(X) = Rear Exit
Flue
Inner Flue Support Bracket
Fig. 23
8.0 Installation
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 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 - 614mm
Side Flue: maximum wall thickness - Right Hand 462mm,
Left Hand 537mm when installed with minimum side
clearances of 5mm.
2. For rear exit - measure the wall thickness
(Fig. 21) and to this dimension add 201mm. This
dimension to be known as (X).
i.e. (X) = wall thickness + 201mm
3. Take the flue and mark off (X) from the
terminal end as indicated in the diagram (Fig. 22).
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 support bracket to the inner face
of the wall (Fig. 21) and to this dimension add the
wall thickness + 268mm. This dimension to be
known as (Y).
i.e. (Y) = support bracket to wall + wall thickness
+ 268mm
5. Take the flue and mark off (Y) from the
terminal end as indicated (Fig. 22).
6. For right hand exit - measure the distance
from the edge of the support bracket to the inner
face of the wall and to this dimension add the wall
thickness + 343mm. This dimension to be known
as (Z).
i.e. (Z) = support bracket to wall + wall thickness
+ 343mm
7. Take the flue and mark off (Z) from the terminal
end as indicated (Fig. 22).
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. 23).