Flue Installation - Buderus 600 - 11S Installation And Maintenance Instructions Manual

Condensate absorption point
The condensate drainage pipe should have a minimum
diameter of 1" and the external pipe length should not be more
than 3 m. The condensate absorption point should be sited in
a convenient position as close as possible to the boiler but not
in the vicinity of other services.
See fig. 10 for information.
NOTE
When discharging condensate to an outside
drain caution must be taken to ensure
blockage cannot occur during freezing
conditions. If this is likely to occur, the use of a
syphon trap is recommended.
1.8

Flue installation

The only flue systems that may be used are those supplied by
Buderus. The flue system must be installed in accordance with
the requirements of BS5440:1. 2000.
Standard 100 mm flue systems
The standard concentric flue system provides for a max.
horizontal straight length of upto 7.5 m (see subsection 1.3.3).
Full instructions for fitting this flue are in subsection 1.8.2:
"Installation of the horizontal flue" on page 16.
IMPORTANT
Any horizontal flue system fitted to a
condensing boiler must be incline towards the
appliance at an angle of 3% (30 mm per metre
length) to prevent condensate dripping from
the flue terminal.
This means that the clearance above the
appliance must be increased to match the duct
length. See figure on page 6.
NOTE
When using a stand-off frame, don't forget to
take its measurements into account when
designing a flue system.
1.8.1 Connecting the vertical flue gas duct
Fit the vertical flue gas duct (fig. 11) onto the appliance flue
connector.
For remaining installation of the vertical flue assembly,
refer to the relevant installation instructions.
Subject to modifications resulting from technical improvements!
Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 11S/19S/24S/24C • 02/2006
External length of
pipe 3m max.
Ø22 mm min.
1000 mm min.
Ø100 mm min.
plastic tube
bottom of
tube sealed
limestone
cladding
Two rows of three
12 mm holes at 25 mm centres
50 mm from bottom of tube and
facing away from house
Fig. 10 External termination of condensate drainage pipe to
absorption point
Flue gas
testing point
Fig. 11 Vertical flue connection
Flue gas
testing point
Fig. 12 Elbow with flue gas testing point
Buderus • http://www.buderus-domestic.co.uk
Installation
Ground
(either/or)
hole depth
400 mm min.
1
15