Buderus 600 - 11R Installation And Servicing Instructions page 20

1 Installation
External termination via internal branch (e.g. sink
waste)
The condensate drainage pipe should have a minimum
outside diameter of 1" with no length restriction. The
connection should preferably be made downstream of
the sink waste trap. If the connection is only possible
upstream, then the air break is needed between the two
traps. This is normally provided by the sink waste pipe
(see fig. 7 and 8).
Condensate absorption point
The condensate drainage pipe should have a minimum
outside 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. 9 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.
Buderus • http://www.buderus-domestic.co.uk
20 Installation and servicing instructions for wall-mounted condensing gas boiler Buderus 600 - 11R/19R/24R • 02/2006
Boiler
Sink
Ø22 mm min.
Fig. 7 External termination of condensate drainage pipe
via internal discharge branch (e.g. sink waste) and
condensate syphon
Boiler
Ø22 mm min.
Sink
No length
restriction
75 mm min. trap
Fig. 8 External termination of condensate drainage pipe
via internal discharge branch (e.g. sink waste –
proprietary fitting) and condensate syphon
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. 9 External termination of condensate drainage pipe to
absorption point
Subject to modifications resulting from technical improvements!
No length restriction
Open end of pipe
75 mm min. trap
direct into gully,
below ground but
above water level
Open end of pipe
direct into gully,
below ground but
above water level
Ground
(either/or)
hole depth
400 mm min.