14
MOUNTING THE BOILER
The fi xing holes for the wall-mounting bracket should now
be drilled and plugged, an appropriate type and quantity
of fi xing 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 (fi g.
13 & 14)
Insert the exhaust connection manifold
(A)
onto the
appliance fl ue outlet.
Remove the blanking plate (located to the right of the
appliance fl ue outlet) and – using the same screws –
install the air inlet plate
(B)
.
Using the hole in the exhaust connection manifold as
a guide, drill a 3mm hole in the appliance fl ue spigot
B
C
A
Fig. 13
Fig. 14
Reduction in maximum fl ue length for each bend
Reduction for bends
Bend
45° bend
90° bend
1.0 metre
1.0 metre
Twin fl ue accessories
Part No.
Description
Length
0225805
Horizontal fl ue terminal
1.0 metre
0225810
Vertical fl ue terminal
1.0 metre
359
Twin adapter kit
N/A
531
Pitched roof fl ashing plate
N/A
532
Flat roof fl ashing plate
N/A
0225815
Condensate drain kit
N/A
0225820
0.25m extension (pair)
250mm
0225825
0.5m extension (pair)
500mm
0225830
1.0m extension (pair)
1000mm
0225835
2.0m extension (pair)
2000mm
0225840
45º bend (pair)
N/A
0225845
90º bend (pair)
N/A
0225850
Twin bracket (5)
N/A
0225855
Single bracket (5)
N/A
4.5.3 TWIN FLUE SYSTEM
The Vokera twin fl ue system enables greater fl ue distances
to be achieved (see 4.4.2) than that of a concentric fl ue
system. It can be used for horizontal or vertical applica-
tions, however the twin fl ue system must be converted
to the dedicated concentric fl ue kit for termination. It is
essential that the installation of the twin fl ue system be
carried out in strict accordance with these instructions.
GUIDANCE NOTES ON TWIN FLUE INSTALLATION
●
The fl ue must have a have a minimum 1º; maximum 3º
(1º = 17mm per 1000mm) fall back to the appliance to
allow any condensate that may form in the fl ue 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 fl ue system is adequately sup-
ported, use at least one bracket for each extension.
●
The entire fl ue system must be adequately insulated to
maintain heat within the fl ue system thereby reducing
the possibility of condensate production.
●
As the exhaust outlet pipe can reach very high tempera-
tures it must be protected to prevent persons touching
the hot surface.
●
The condensate drain pipe must be connected in ac-
cordance with building regulations.
and secure the exhaust manifold connection to the fl ue
spigot using the screw provided
(C).
Using the two holes in the air inlet plate as a guide, drill
a 3mm hole in each and secure the air inlet pipe/bend
using the screws provided.
The twin fl ue pipes extensions and accessories can now
be installed by pushing together (the plain end of each
extension or bend should be pushed approximately 50mm
into the female socket of the previous piece).
4.5.3.2 HORIZONTAL TERMINATION (fi g. 15)
The twin fl ue system must be converted to the dedicated
concentric fl ue kit for termination.
The horizontal terminal is supplied with a built-in con-
verter box and cannot be shortened.
A 130mm hole is required for the passage of the con-
centric terminal through the wall.
The air inlet pipe must always be level with or below,
that of the exhaust pipe.
Depending on site conditions it may be preferable to install
the terminal assembly prior to fi tting the twin fl ue pipes.
Mark and drill a level 130mm hole for the passage of the
horizontal fl ue terminal. Insert the terminal assembly
into the fl ue hole.
Push-fi t the twin fl ue 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 fl ue pipes
to allow connection to the concentric to twin converter.
NOTE
before cutting twin fl ue 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.