16
4.5.2 CONCENTRIC VERTICAL FLUE
The appliance can be used with either the Vokèra condensing
60/100mm concentric
fl
ue system or the optional 80/125mm
concentric
fl
ue system.
NOTE
These instructions relate
only
to the Vokèra condensing
60/100mm concentric
fl
ue system. For speci
fi
c details on the
installation of the 80/125mm concentric
fl
ue system please refer
to the instructions supplied.
The vertical
fl
ue terminal can be connected directly to the ap-
pliance
fl
ue outlet. Alternatively, an extension or bend can be
connected to the appliance
fl
ue outlet if desired, however if
additional bends are
fi
tted, a reduction must be made to the
maximum
fl
ue length (see table below).
Reduction for bends
Bend
Reduction in maximum
fl
ue length for each bend
45º bend
1.0 metre (60/100) - 1.0 metre (80/125)
90º bend
1.0 metre (60/100) - 1.5 metre (80/125)
Vertical
fl
ue terminal and accessories
Part No.
Description
Length
29450122 Vertical
fl
ue terminal
1000 mm
531
Pitched roof
fl
ashing plate
N/A
532
Flat roof
fl
ashing plate
N/A
29450123 90-degree bend
N/A
29450124 45-degree bends (pair)
N/A
29450125 500mm extension
500 mm
29450126 1000mm extension
1000 mm
29450127 2000mm extension
2000 mm
29450128 Telescopic extension
372/519 mm
529
Wall bracket pack (5)
208mm
Using the dimensions given in
fi
g. 21 as a reference, mark and
cut a 125mm hole in the ceiling and/or roof.
Fig. 21
“X”
12/15/20HE = 202mm
25/30/35HE = 218mm
130mm
Fit the appropriate
fl
ashing plate to the roof and insert the ver-
tical
fl
ue terminal through the
fl
ashing plate from the outside,
ensuring that the collar on the
fl
ue terminal
fi
ts over the
fl
ashing.
The
fi
xing holes for the wall-mounting bracket should now be
drilled and plugged, an ‘appropriate type and quantity of
fi
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
fl
ue 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
fl
ue assembly to the boiler
fl
ue spigot us-
ing the 100mm clip, gasket & screws (supplied), ensuring the
correct seal is made. The
fl
ue support bracket (supplied with
the vertical
fl
ue kit) can now be
fi
tted.
If the vertical
fl
ue requires extension/s or additional bend/s,
connect the required number of
fl
ue extensions or bends (up
to the maximum equivalent
fl
ue length) between the boiler and
vertical
fl
ue assembly (see
fi
g. 17).
Ensure that any horizontal sections of the
fl
ue system have a
minimum 1º; maximum 3º fall back to the boiler (1º = 17mm
per 1000mm).
NOTE
When cutting an extension to the required length, you must
ensure that the excess is cut from the plain end of the exten-
sion. Remove any burrs, and check that any seals are located
properly.
You must ensure that the entire
fl
ue system is properly sup-
ported and connected.
4.5.3 TWIN FLUE SYSTEM
The Vokèra twin
fl
ue system enables greater
fl
ue distances
to be achieved than that of a concentric
fl
ue system. It can be
used for horizontal or vertical applications, however the twin
fl
ue system must be converted to the dedicated concentric
fl
ue kit for termination. It is essential that the installation of the
twin
fl
ue system be carried out in strict accordance with these
instructions.
GUIDANCE NOTES ON TWIN FLUE INSTALLATION
• The
fl
ue must have a have a minimum 1º; maximum 3º (1º =
17mm per 1000mm) fall back to the appliance to allow any
condensate that may form in the
fl
ue system to drain via the
condensate drain. Consideration must also be given to the
fact that there is the possibility of a small amount of conden-
sate dripping from the terminal.
• Ensure that the entire
fl
ue system is adequately supported,
use at least one bracket for each extension.
• As the exhaust outlet pipe can reach very high temperatu-
res it must be protected to prevent persons touching the hot
surface.
• The condensate drain pipe must be connected in accordan-
ce with building regulations
Reduction for bends
Bend
Reduction in maximum
fl
ue length for each bend
45º bend
1.0 metre
90º bend
1.5 metre
Twin
fl
ue accessories
Part No.
Description
Length
0225805
Horizontal
fl
ue terminal
1.0 metre
0225810
Vertical
fl
ue terminal
1.0 metre
359
Twin adapter kit
N/A
531
Pitched roof
fl
ashing plate
N/A
532
Flat roof
fl
ashing plate
N/A
0225815
Condensate drain kit
N/A
0225820
0.25m extension (pair)
250mm
0225825
0.5m extension (pair)
500mm
0225830
1.0m extension (pair)
1000mm
0225835
2.0m extension (pair)
2000mm
0225840
45º bend (pair)
N/A
0225845
90º bend (pair)
N/A
0225850
Twin bracket (5)
N/A
0225855
Single bracket (5)
N/A
MOUNTING THE BOILER
The
fi
xing holes for the wall-mounting bracket should now be
drilled and plugged, an appropriate type and quantity of
fi
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.