14
EXTENDING THE FLUE
Connect the bend – supplied with the terminal kit – to the top
of the boiler using clamp (supplied) see fig. 11. The additional
bends & extensions have push-fit connections, care should be
taken to ensure that the correct seal is made when assembling
the flue system. Connect the required number of flue exten-
sions or bends (up to the maximum equivalent flue length) to
the flue terminal (see fig. 11-15).
The flue system should have
a minimum of 1º; maximum of 3º rise from the boiler to outside,
to ensure any condense fluid that forms, is allowed to drain
back to the appliance.
NOTE
When cutting an extension to the required length, you must
ensure that the excess is cut from the plain end of the extension
(see fig. 11-15). Remove any burrs, and check that all seals are
located properly. You must ensure that the entire flue system is
properly supported and connected. Seal the flue assembly to
the wall using cement or a suitable alternative that will provide
satisfactory weatherproofing. The interior and exterior trim can
now be fitted.
Fig. 14
4.5.2 CONCENTRIC VERTICAL FLUE
The appliance can be used with either the Vokèra condensing
60/100mm concentric flue system or the optional 80/125mm
concentric flue system.
Fig.13
A
Fig. 12
NOTE
These instructions relate
only
to the Vokèra condensing
60/100mm concentric flue system. For specific details on the
installation of the 80/125mm concentric flue system please refer
to the instructions supplied.
The vertical flue terminal can be connected directly to the
appliance flue outlet. Alternatively, an extension or bend can
be connected to the appliance flue outlet if desired, however
if additional bends are fitted, a reduction must be made to the
maximum flue length (see table below).
Reduction for bends
Bend
Reduction in maximum flue length for each bend
45º bend
1.0 metre (60/100) - 1.0 metre (80/125)
90º bend
1.0 metre (60/100) - 1.0 metre (80/125)
Vertical flue terminal and accessories
Part No.
Description
Length
29450122
Vertical flue terminal
1000mm
531
Pitched roof flashing plate N/A
532
Flat roof flashing plate
N/A
29450123
90-degree bend
N/A
29450124
45-degree bends (pair)
N/A
29450125
500mm extension
500mm
29450126
1000mm extension
1000mm
29450127
2000mm extension
2000mm
29450128
Telescopic extension
372/519mm
529
Wall bracket pack (5)
208mm
Using the dimensions given in fig. 12 as a reference, mark and
cut a 125mm hole in the ceiling and/or roof.
Fig. 15
Fit the appropriate flashing plate to the roof and insert the ver-
tical flue terminal through the flashing plate from the outside,
ensuring that the collar on the flue terminal fits over the flashing.
The fixing holes for the wall-mounting bracket should now be
drilled and plugged, an ‘appropriate type and quantity of fixing
should be used to ensure that the bracket is mounted securely.
Once the bracket has been secured to the wall, mount the ap-
pliance onto the bracket.
IMPORTANT
The vertical flue terminal is 1.0 metre in length and cannot be
cut; therefore it may be necessary to adjust the height of the
appliance to suit or use a suitable extension.
Connect the vertical flue assembly to the boiler flue spigot us-
ing the 100mm clip, gasket & screws (supplied), ensuring the
correct seal is made. The flue support bracket (supplied with
the vertical flue kit) can now be fitted.
If the vertical flue requires extension/s or additional bend/s,
connect the required number of flue extensions or bends (up
to the maximum equivalent flue length) between the boiler and
vertical flue assembly.
Ensure that any horizontal sections of the flue system have a
minimum 1º; maximum 3º fall back to the boiler (1º = 17mm
per 1000mm).
