Supplied By www.heating spares.co Tel. 0161 620 6677
10
Fig. 9
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 any seals are
located properly.
4.5.3
TWIN FLUE SYSTEM
The Vokera twin flue system enables greater flue
distances to be achieved (see 2.9) than that of the
standard concentric flue system. It can be used for
horizontal or vertical applications, however the twin
flue system must be converted to the dedicated
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
INSTALLATION
●
The flue must have a fall back of 1
°
back to the
appliance to allow any condensate that forms
in the flue system to 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.
●
As the exhaust outlet pipe can reach very high
temperatures it must be protected to prevent
persons touching the hot surface.
MOUNTING THE BOILER
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 mounted
securely. Once the bracket has been secured to
the wall, mount the appliance onto the bracket.
Reduction in maximum flue length for each bend
Reduction for bends
Bend
45
°
bend
90
°
bend
1,0 metre
1,0 metre
Twin flue accessories
Part No.
Description
Length
0225805
0225810
359
0225770
0225765
0225815
0225820
0225825
0225830
0225835
0225840
0225845
0225850
0225855
Horizontal flue terminal
Vertical flue terminal
Twin adapter kit
Pitched roof flashing plate
Flat roof flashing plate
Condensate drain kit
0,25m extension (pair)
0,5m extension (pair)
1,0m extension (pair)
2,0m extension (pair)
45
°
bend (pair)
90
°
bend (pair)
Twin bracket (5)
Single bracket (5)
1000 mm
1000 mm
N/A
N/A
N/A
N/A
250mm
500mm
1000mm
2000mm
N/A
N/A
N/A
N/A
4.5.3.1 INSTALLATION OF TWIN ADAPTOR KIT (see fig. 9)
●
Discard the restrictor ring (supplied with the twin
adapter kit).
●
Insert the exhaust connection manifold onto the
appliance flue outlet.
●
Place the silicone seal (supplied with twin
adapter kit) over the rim of the exhaust
connection manifold.
●
Remove one of the blanking plate (located to
the left & right of the appliance flue outlet) and
– using the same screws – install the air baffle.
4.5.3.2 HORIZONTAL TERMINATION (see fig. 10)
The twin flue system must be converted to the
dedicated concentric flue kit for termination.
●
The horizontal terminal is supplied with a built-
in converter box and cannot be shortened.
●
A 130mm hole is required for the passage of
the concentric terminal through the wall.
Depending on site conditions it may be preferable
to install the terminal assembly prior to fitting the
twin flue pipes.
Mark and drill a 130mm hole for the passage of
the horizontal flue terminal, ensuring that there
is a 1
°
fall back to the boiler (17mm per 1000mm).
Insert the terminal assembly into the flue hole.
Push-fit the twin flue pipes onto the concentric to
twin converter box ensuring that the exhaust pipe
connects to the exhaust connection on the
concentric to twin converter.
If necessary cut the plain ends (male) of the twin
flue pipes to allow connection to the concentric
to twin converter.
NOTE
Before cutting twin flue pipes ensure allowances
have been made for connection onto the previous
piece and onto the concentric to twin converter.
The last twin flue pipes must be pushed 50mm
onto the male spigots of the concentric to twin
converter.
NOTE
You must ensure that the entire flue system is
properly supported and connected.
When cutting an extension to the required length,
you should ensure that the excess is cut from