VOKERA Mynute EHE Installation & Servicing Instructions Manual - page 12
10
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
Fig. 9
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 exterior trim can now be
fitted.
4.5.1.1 EXTENDING THE FLUE
Connect the bend - supplied with the terminal kit - to the
top of the boiler using clamp (supplied) see fig. 7. 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 re-
quired number of flue extensions or bends (up to the maxi-
mum equivalent flue length) to the flue terminal (see fig. 7
& 8).
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. 7 & 8). 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 suit-
able alternative that will provide satisfactory weatherproof-
ing. The interior and exterior trim can now be fitted.
4.5.2
CONCENTRIC VERTICAL FLUE
The appliance can be used with either the Vokera con-
densing 60/100mm concentric flue system or the optional
80/125mm concentric flue system.
NOTE
These instructions relate
only
to the Vokera condensing
60/100mm concentric flue system. For specific details on
Fig. 8
Fig. 7a
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 con-
nected to the appliance flue outlet if desired (see 4.4.2),
however if additional bends are fitted, a reduction must be
made to the maximum flue length (see table below).
FLUE RESTRICTOR RING (vertical flue)
To ensure maximum efficiency of the appliance, it may be
necessary to fit one of the supplied flue restrictor rings to the
appliance flue outlet (see tables below).
Using the dimensions given in fig. 9 as a reference, mark
and cut a 107mm hole in the ceiling and/or roof.
“X”
“Y”
30mm
1-3 degree
“X” + 45mm = “Y”
Part No.
Description
Length
530
Vertical flue terminal
1000 mm
531
Pitched roof flashing plate
N/A
532
Flat roof flashing plate
N/A
523
90-degree bend
N/A
524
45-degree bends (pair)
N/A
525
500mm extension
500 mm
526
1000mm extension
1000 mm
527
2000m extension
2000 mm
528
Telescopic extension
350/730 mm
529
Wall bracket pack (5)
208 mm
Vertical flue terminals and accessories
Bend
Reduction in maximum flue length for each bend
45º bend
0.5 metre
90º bend
1.0 metre
Reduction for additional bends
145
Total flue length
Restrictor required
Less than 2.0 metres
82.5mm
Less than 4.0 metres
88.0mm
Less than 5.5 metres
not required
Total flue length
Restrictor required
Less than 3.0 metres
84mm
Less than 5.0 metres
not required
Total flue length
Restrictor required
Less than 3.0 metres
not required
29 EHE
35 EHE
25 EHE