Technical data

12
e
4.5.4 CONCENTRIC FLUE 80/125mm
The Vokera 80/125mm concentric flue system enables
greater flue lengths to be achieved compared to the
standard 60/100mm concentric system.
NOTE
The 80/125mm-flue system must be used when
installing the Syntesi 29 e.
MAXIMUM FLUE LENGTHS
Please refer to section 2 to ensure that the
proposed installation does not exceed the
maximum flue length permitted.
When choosing a location for the boiler,
consideration should be given to the disposal of
the Condensate discharge into a suitable drain
or soil pipe. The Condensate outlet pipe must be
connected to the drain in accordance with building
regulations or other rules in force.
The plastic waste pipe must have a minimum of
a 3° fall towards the drain. Any external run of
pipe should be insulated to prevent the risk of
freezing.
4.5.4.1 FITTING THE 80/125mm ADAPTOR
Connect the adaptor to the appliance by gently
inserting the 80/125mm (inner) pipe into the flue
gas outlet connection of the appliance. Secure
the adaptor to the appliance using the 100mm
clip supplied with the adaptor (see fig. 10 & 11).
4.5.4.1 HORIZONTAL FLUE SYSTEM
The 80/125mm flue system requires a fall of at
least 1° (17mm per metre) back to the boiler to
enable any condensate fluid to run back to the
condensate collector/trap. Connect a 90° bend
to the adaptor and carefully measure the distance
from the centre of the appliance flue outlet to the
edge of the finished outside wall. This will enable
you to calculate the necessary height difference
between the appliance flue elbow and the flue
exit hole (see fig. 12).
Once the flue exit hole has been defined, drill a
127mm hole through the wall. The hole should
slope back to the boiler by at least 1°. Using the
appropriate number of extensions and bends (see
table), assemble the flue system ensuring that
the flue pipe is secured at every 1.5-metres and
that the correct seal is made. The flue
components are comprised of an 80mm
aluminium – inner – pipe, and a 125mm PVC –
outer – pipe. All flue components are “push-fit”
and can be assembled/disassembled with ease.
In addition, the flue extensions can be cut to an
appropriate length if required (see fig. 13 & 14).
Silicone lubricant or water can be used to ease
the assembly of the push-fit components.
NOTE
When cutting an extension to the required length,
you must ensure that the excess is cut from the
plain end of the extension. Remove any burrs,
and check that all seals are located properly.
You must ensure that the entire flue system is
properly supported and connected.
80/125mm accessories
Part No. Description Length
424 Condensing boiler adaptor N/A
413 Horizontal flue terminal kit
414 Vertical flue terminal kit 1000mm
415 87
o
Bend N/A
416 45
o
Bend N/A
417 0.25m extension 250mm
418 0.5m extension 500mm
419 1.0m extension 1000mm
420 2.0m extension 2000mm
421 3.0m extension 3000mm
422 Telescopic extension 350-500mm
423 Wall brackets (5-off) N/A
425 Fixed offset N/A
426 Assembly lubricant N/A
0225765 Flat flashing N/A
0225770 Angled flashing N/A
Reduction for bends
Bend Reduction in maximum flue length for each bend
45° bend 1.0 metre
90° bend 1.0 metre
Fig. 10
Fig. 11
Fig. 12