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8. Connecting the furnace
8.4 Flue gas system connections
- The horizontal sections on the flue gas side will be constructed with
a gradient to the boiler of 3 %. The cross-section of the aeration
vent in the premises for B
combustive air into the premises) must comply with the DTU 61.1
standard.
- Type C appliances can only be installed with the systems
mentioned in these technical instructions (particularly concentric
pipes, terminal connection parts).
- As connections of type B
conduits are pressurised, they must be either installed outside or
in a ventilated brick sheath.
Ventilation must be ensured:
- by an opening located in the lower section, taking the air either
from the common ventilated areas or directly from outside, and
- by an opening in the upper section connected directly with the
outside.
The minimum cross section of the air vent and the openings to be
2
provided must be 100 cm
(clear cross section).
For Belgium: Comply with the NBN D 51-003 standard.
32
type connections (i.e. intake of
23
chimney conduits and type C
23
DTG(E)130 - 35/45/65/90/115 Eco.NOxPlus
The parts of this sheath which can be dismantled must allow for
inspection of the flue gas conduit along its entire length.
53
Comply with the installation instructions and the information on the
authorised lengths of the flue gas pipes.
Remove the anti-dust cap.
Mount the flue gas pipe or the fresh air/flue gas discharge
system in compliance with the assembly instructions.
Check the seal.
- Static test overpressure: 1000 Pa
- Maximum leak rate: 50 l/hm
the flue gas pipe
A diameter 80 = 0.25 m
A diameter 100 = 0.31 m
On concentric flue gas discharge systems (forced flue), the C0
level in the annular space in the measurement piping can also
be checked. The flue gas discharge system is considered leak-
proof if the measured CO
2
depending on the internal surface of
2
/m,
2
/m
level is lower than 0.2%.
2
15/02/2011 - 300014279-001-J
2
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