Supplied By www.heating spares.co Tel. 0161 620 6677
11
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 as-
sembling the flue system. Connect the required
number of flue extensions or bends (up to the
maximum equivalent flue length) to the flue ter-
minal (see fig. 7 & 8).
The flue pipe should have a minimum 1-degree
rise from the boiler (17mm every 1.0 metre) to
ensure that any condense fluid drains 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). 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.
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 con-
densing 60/100mm concentric flue system. For
specific details on the installation of the 80/125mm
concentric flue system please refer to the instruc-
tions supplied with the 80/125mm terminal.
The vertical flue terminal can be connected di-
rectly to the appliance flue outlet. Alternatively,
an extension or bend can be connected to the
appliance flue outlet if desired (see 4.4.2), how-
ever if additional bends are fitted, a reduction
must be made to the maximum flue length (see
table below).
Fig. 8
Part No.
Description
Min-Max Length
0225725
Vertical flue terminal
1.0 metre
0225770
Pitched roof flashing plate
N/A
0225765
Flat roof flashing plate
N/A
0225755
350-500 telescopic extension 350 mm – 500 mm
0225740
0.5m extension
500 mm
0225745
1.0m extension
1000 mm
0225750
2.0m extension
2000 mm
0225730
45º bend (pair)
N/A
0225735
90º bend
N/A
0225760
Wall bracket (4)
N/A
Vertical flue terminal and accessories
Using the dimensions given in fig. 9 as a refer-
ence, mark and cut a 107mm hole in the ceiling
and/or roof.
Bend
Reduction in maximum flue length for each bend
45º bend
0.5 metre
90º bend
1.0 metre
Reduction for bends
Fig. 7a
“
X
” + 45 mm = “
Y
”
125 mm
FLUE RESTRICTOR RING (horizontal 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).
Total flue length
Restrictor required
Less than 1.2 metre
82.5mm diameter
Less than 3.0 metres
88mm diameter
Less than 4.5 metres
not required
25
Total flue length
Restrictor required
Less than 2.0 metres
84mm diameter
Less than 4.0 metres
not required
29
Total flue length
Restrictor required
Less than 1.85 metres
not required
35
Fig. 9
145
