17
4.5.2 CONCENTRIC VERTICAL FLUE
The appliance can be used with either the Vokèra condensing
60/100mm concentric lue system or the optional 80/125mm
concentric lue system.
NOTE
These instructions relate
only
to the Vokèra condensing
60/100mm concentric lue system. For speciic details on the
installation of the 80/125mm concentric lue system please refer
to the instructions supplied.
The vertical lue terminal can be connected directly to the ap
-
pliance lue outlet. Alternatively, an extension or bend can be
connected to the appliance lue outlet if desired, however if
additional bends are itted, a reduction must be made to the
maximum lue length (see table below).
Reduction for bends
Bend
Reduction in maximum lue length for each bend
45º bend
1.3 metre (60/100) - 1.0 metre (80/125)
90º bend
1.6 metre (60/100) - 1.5 metre (80/125)
Vertical lue terminal and accessories
Part No.
Description
Length
29450122 Vertical lue terminal
1000mm
531
Pitched roof lashing plate
N/A
532
Flat roof lashing 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 ig. 18 as a reference, mark and
cut a 125mm hole in the ceiling and/or roof.
Fig. 18
“X”
12/15/20HE = 202mm
25/30/35HE = 218mm
130mm
Fit the appropriate lashing plate to the roof and insert the ver
-
tical lue terminal through the lashing plate from the outside,
ensuring that the collar on the lue terminal its over the lashing.
The ixing holes for the wall-mounting bracket should now be
drilled and plugged, an ‘appropriate type and quantity of ixing
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 lue 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 lue assembly to the boiler lue spigot us
-
ing the 100mm clip, gasket & screws (supplied), ensuring the
correct seal is made. The lue support bracket (supplied with
the vertical lue kit) can now be itted.
If the vertical lue requires extension/s or additional bend/s,
connect the required number of lue extensions or bends (up
to the maximum equivalent lue length) between the boiler and
vertical lue assembly (see ig. 14).
Ensure that any horizontal sections of the lue 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 lue system is properly sup
-
ported and connected.
4.5.3 TWIN FLUE SYSTEM
The Vokèra twin lue system enables greater lue distances
to be achieved than that of a concentric lue system. It can be
used for horizontal or vertical applications, however the twin
lue system must be converted to the dedicated concentric
lue kit for termination. It is essential that the installation of the
twin lue system be carried out in strict accordance with these
instructions.
GUIDANCE NOTES ON TWIN FLUE INSTALLATION
• The lue 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 lue 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 lue 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 lue length for each bend
45º bend
1.0 metre
90º bend
1.5 metre
Twin lue accessories
Part No.
Description
Length
0225805 Horizontal lue terminal
1.0 metre
0225810 Vertical lue terminal
1.0 metre
359
Twin adapter kit
N/A
531
Pitched roof lashing plate
N/A
532
Flat roof lashing 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 ixing holes for the wall-mounting bracket should now be
drilled and plugged, an appropriate type and quantity of ixing
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.