VOKERA Hydra Installation & Servicing Instructions Manual - page 14
12
Using the dimensions given in fig. 8 as a reference,
mark and cut a 105 mm hole in the ceiling and/or
roof.
IMPORTANT
You must ensure that the terminal is at least 300
mm from any structure or surface (fig. 8).
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. Ensure that any horizontal
sections of the flue system have a 1
°
fall back to
the boiler (17 mm per 1000 mm).
Fit the appropriate flashing plate to the roof and
insert the vertical flue terminal through the flashing
plate from the outside, ensuring that the collar on
the flue terminal fits over the flashing.
The fixing holes for the wall-mounting bracket
and fixing jig 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.
Secure the vertical flue terminal or intermediate
flue component, to the appliance using the boiler
top adaptor and 100 mm clamp supplied.
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 section 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.
●
Extreme care must be taken to ensure that no
debris is allowed to enter the flue system at
any time.
●
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 and
fixing jig 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.
4.5.3.1 INSTALLATION OF TWIN ADAPTOR KIT (fig. 9)
●
Insert the exhaust connection manifold (B) onto
the appliance flue outlet and secure to the flue
spigot using the screws provided.
●
Remove the blanking plates (located to the left
of the appliance flue outlet) and – using the
same screws – install the air baffle (A).
4.5.3.2 HORIZONTAL TERMINATION (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 130 mm 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 130 mm hole for the passage of
the horizontal flue terminal, ensuring that there is
a 1
°
fall back to the boiler (17 mm per 1000 mm).
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
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
0.25 m extension (pair)
0.5 m extension (pair)
1.0 m extension (pair)
2.0 m 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
250 mm
500 mm
1000 mm
2000 mm
N/A
N/A
N/A
N/A
Fig. 9
B
A