Vaillant Air flue duct Installation Instructions Manual - page 42
Flue installation instructions ecoTEC 834449_13
42
h
Note
Due to the long lengths of flue possible and the
slope required, it may be necessary to adjust
the location of the boiler installation template.
Please check that both the boiler installation
site and flue termination are in accordance with
these instructions prior to drilling any holes for
the boiler hanging bracket.
• Once the position of the flue exit hole has been deter-
mined, the hole should be cut through the wall using a
core drill of 127 mm diameter. The flue exit hole
should be cut with a rise towards outside of 3°.
• Measure the distance from the outside face of the wall
to the centre of the fan outlet on the boiler (fig. 3.9).
This is dimension A.
A
Fig. 3.9 Distance to external wall
• For installations where the measured distance dimen-
sion A (fig. 3.9) is greater than 960 mm, an air/flue
extension accessory will be required. The number of
air/flue duct extensions which can be used depends
on the boiler.
• Taking each extension to be used, fit the flue duct into
the air duct and secure using the 3 screws provided.
5 mm
A
B
Fig. 3.10 Air duct
Key
A = Mark air duct here
B = Dimension A + 10 mm
• For ease of measuring and marking the air/flue duct
extensions, assemble them loosely together with the
air/flue duct and terminal assembly as shown (fig.
3.10).
h
Note
The joints between the flue duct sections are of
a push-fit type, with the flue duct spigot insert-
ed into a socket containing a sealing ring. For
ease of installation lubricate the seal using
soap solution prior to assembling.
• Assemble the flue such that there is a gap of about
5 mm between each air duct, which will ensure the
correct flue duct penetration into the flue sockets of
30 mm. All flue sockets should point towards the flue
terminal.
• Measure from the flue terminal and mark the air duct
to a length of: Dimension A + 60 mm.
• Take the extension(s) to be shortened and remove the
3 screws. Separate the ducts.
h
Note
For assembly reasons do not shorten any air
duct to a length of less than 100 mm. If neces-
sary shorten two adjacent extensions to
achieve the overall required length.
• Cut the air duct square and remove any burrs.
• Refit the flue duct into the air duct and secure using
the 3 screws.
25 mm
A
15 mm
Fig. 3.11 Flue duct
Key
A = Mark flue duct here
• Cut the flue duct as detailed in fig. 3.11.
• When cutting the air and flue ducts it is important to
remove any burrs with a file, this ensures easy fitting
of the ducts and prevents any rough edges from dam-
aging the flue seals.
• Care should be taken not to scratch the white surface
of the air duct.
• If the installation requires the use of air/flue duct ex-
tensions, additional bends or elbows refer to the sec-
tion 3.7.
• At this stage it is necessary to prepare and fit the
boiler onto the hanging bracket – refer to the boiler
installation instructions.
• Fit the appliance flue outlet adaptor to the boiler.
3 Optional Concentric System Ø 80/125