Supplied By www.heating spares.co Tel. 0161 620 6677
12
UNICA BHE
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. 9. The additional bends & extensions have
push-fit connections, care should be taken to en-
sure that the correct seal is made when assem-
bling the flue system. Connect the required number
of flue extensions or bends (up to the maximum
equivalent flue length) to the flue terminal (see
fig. 9 & 10).
Any flue extensions 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
(see fig. 9B&9C) .
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. 9 & 10). Re-
move any burrs, and check that all seals are lo-
cated 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 suitable alternative that will provide satisfac-
tory weatherproofing. The interior and exterior trim
can now be fitted.
Fig. 10
fig. 9C
4.5.2
CONCENTRIC VERTICAL FLUE
The appliance can be used with either the Vokera
condensing 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 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 exten-
sion or bend can be connected 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).
fig. 9B