Boulter Buderus Benchmark 600 Series, Installation And Servicing Instruction

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Installation 1
14 Installation and maintenance instructions for wall-mounted condensing gas boiler 600 - 28C • 01/2004
Subject to modifications resulting from technical improvements! Boulter Buderus Ltd. • http://www.boulter-boilers.com
Condensate absorption point
The condensate drainage pipe should have a minimum diam-
eter of 22 mm 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. 13 for information.
1.8 Flue installation
The only flue systems that may be used are those supplied by
Boulter Buderus. The flue system must be installed in accord-
ance with the requirements of
BS5440:1. 2000 .
Standard 100 mm flue systems
The standard concentric flue system provides for a max. hori-
zontal straight length of upto 12.0 m for 60/100 flue connection
(see subsection 1.3.3).
Full instructions for fitting this flue are in subsection 1.8.2:
"Installation of the horizontal flue" on page 15.
1.8.1 Connecting the vertical flue gas duct
z
Fit the vertical flue gas duct or flue gas adaptor (80/125 to
60/100) (fig. 14) onto the appliance flue connector.
z
For remaining installation of the vertical flue assembly,
refer to the relevant installation instructions.
fig. 13 External termination of condensate drainage pipe to
absorption point
Ø100 mm min.
plastic tube
bottom of
tube sealed
limestone
cladding
hole depth
400 mm min.
300 mm min.
25 mm min.
Ground
(either/or)
Two rows of three
12 mm holes at 25 mm centres
50 mm from bottom of tube and
facing away from house
500 mm min.
Ø22 mm min.
External length of
pipe 3m max.
NOTE
When discharging condensate to an outside
drain caution must be taken to ensure
blockage cannot occur during freezing condi-
tions. If this is likely to occur, the use of a
siphon trap is recommended.
fig. 14 Vertical flue connection
Flue gas
testing point
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 appli-
ance must be increased to match the duct
length. See figure on page 6.
fig. 15 Elbow with flue gas testing point
Flue gas
testing point
NOTE
When using a stand-off frame, don’t forget to
take its measurements into account when
designing a flue system.