Supplied By www.heating spares.co Tel. 0161 620 6677
12
Fit the appropriate flashing plate to the roof and
insert the vertical flue terminal through the flash-
ing 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 appropri-
ate 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.
Connect the vertical flue assembly to the boiler flue
spigot using the 60mm & 100mm clips, gaskets &
screws (supplied), ensuring the correct seal is
made. The flue support bracket (supplied with the
vertical flue kit) can now be fitted.
If the vertical flue requires extension/s or addi-
tional 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 fall back to the boiler
(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 dedi-
cated 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 INSTAL-
LATION
●
The flue must have a fall back of 1º 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 sys-
tem thereby reducing the possibility of conden-
sate production.
●
As the exhaust outlet pipe can reach very high
temperatures it must be protected to prevent
persons touching the hot surface.
●
The condensate drainpipe must be connected
in accordance with local building regulations
that are in force.
MOUNTING THE BOILER
The fixing holes for the wall-mounting bracket
should now be drilled and plugged, an appropri-
ate 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.
Part No.
Description
Min-Max Length
0225805
Horizontal flue terminal
1.0 metre
0225810
Vertical flue terminal
1.0 metre
430
Twin adapter kit
N/A
0225770
Pitched roof flashing plate
N/A
0225765
Flat roof flashing plate
N/A
0225815
Condensate drain kit
N/A
0225820
0.25 m extension (pair)
250 mm
0225825
0.5 m extension (pair)
500 mm
0225830
1.0 m extension (pair)
1000 mm
0225835
2.0 m extension (pair)
2000 mm
0225840
45º bend (pair)
N/A
0225845
90º bend (pair)
N/A
0225850
Twin bracket (5)
N/A
0225855
Single bracket (5)
N/A
Twin flue accessories
Bend
Reduction in maximum flue length for each bend
45º bend
1.0 metre
90º bend
1.0 metre
Reduction for bends
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).
Total flue length
Restrictor required
Less than 2.0 metre
82.5mm diameter
Less than 4.0 metres
88mm diameter
Less than 5.5 metres
not required
25
Total flue length
Restrictor required
Less than 2.8 metres
84mm diameter
Less than 5.0 metres
not required
29
Total flue length
Restrictor required
Less than 2.7 metres
not required
35
FLUE RESTRICTOR RING (vertical flue)
To ensure maximum efficiency of the appliance,
it may be necessary to fit one of the flue restrictor
rings (supplied with the twin adaptor kit) to the
appliance flue outlet (see tables below).
Total flue length
Restrictor required
Less than 7.0 metre
40mm diameter
Less than 13.5 metres
45mm diameter
Less than 19.5 metres
not required
25
Total flue length
Restrictor required
Less than 5.0 metres
45mm diameter
Less than 12.0 metres
not required
29
