Supplied By www.heating spares.co Tel. 0161 620 6677
12
Reduction in maximum flue length for each bend
Reduction for bends
Bend
45° bend
90° bend
1.0 metre
1.0 metre
Reduction for bends
Bend
Reduction in maximum flue length for each bend
45° bend
90° bend
0.5 metre
1.0 metre
Vertical flue terminal and accessories
Part No.
Description
Min-Max length
530
531
532
523
524
525
526
527
528
529
Vertical flue terminal
Pitched roof flashing plate
Flat roof flashing plate
90-degree bend
45-degree bends (pair)
500mm extension
1000mm extension
2000mm extension
Telescopic extension
Wall bracket pack (5)
1000 mm
N/A
N/A
N/A
N/A
500mm
1000 mm
2000 mm
350/730mm
208mm
Using the dimensions given in fig. 9 as a reference,
mark and cut a 115mm hole in the ceiling and/or
roof.
Fit the appropriate flashing plate to the roof and
insert the vertical 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 appliance 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.
Fig. 9
Connect the vertical flue assembly to the boiler
flue spigot using 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 ver tical 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 (see fig. 8).
Ensure that any horizontal sections of the flue
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 extension (see fig. 8). Remove
any burrs, and check that any seals are located
properly.
You must ensure that the entire flue system is
properly supported and connected.
4.5.3
TWIN FLUE SYSTEM
The Vokera twin flue system enables greater flue
distances to be achieved (see 4.4.2) than that of
a concentric flue system. It can be used for
horizontal or vertical applications, however the twin
flue system must be converted to the dedicated
concentric flue kit for termination. It is essential
that the installation of the twin flue system be
carried out in strict accordance with these
instructions.
GUIDANCE NOTES ON TWIN FLUE
INSTALLATION
•
The flue must have a minimum 1º; maximum 3º
(1º = 17mm per 1000mm) fall back to the
appliance to allow any condensate that may form
in the flue 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 condensate dripping from the terminal.
•
Ensure that the entire flue system is adequately
supported, use at least one bracket for each
extension.
•
The entire flue system must be adequately
insulated to maintain heat within the flue system
thereby reducing the possibility of condensate
production.
•
As the exhaust outlet pipe can reach very high
temperatures it must be protected to prevent
persons touching the hot surface.
•
The condensate drain pipe must be connected
in accordance with building regulations
“X”
12/15/20HE = 202mm
25/30/35HE = 218mm
“X”