4 Installation
Installation manual
16
D2C20ND0 D2C24ND035A5AA
Wall-mounted condensing boiler
3P469346-10J – 2018.05
4.8.8
Guidelines for condensate piping
termination
Condensate piping can be connected to a termination in different
ways shown below:
Terminating into an internal soil and vent stack
b
a
≥450 mm
a
Air breaker
b
Internal soil and vent stack
Terminating into an external waste system
a
a
Open end direct into gully, below ground but above water
level
Terminating into an external purpose made soakaway
a
b
a
Open end direct into gully, below ground but above water
level
b
Sink, basin, bath or shower
NOTICE
Use of a condensate drain pump is necessary where
termination of condensate line is below a soakaway.
4.8.9
Guidelines when connecting the boiler to
the flue gas system
DANGER
Risk of poisoning due to flue gas escaping within enclosed
rooms that are inadequately ventilated.
CAUTION
Connected flue type must be identified on the identification
label.
Approved flue systems
Choose a flue type according to the installation site.
Approved flue types are written on the identification label.
Flue termination
The positions of the terminals in the roof or in the wall with respect to
openings for ventilation must be in accordance with national
regulations.
▪ The boiler must be installed so that the terminal is exposed to
external air.
▪ Position of the terminal must allow the free passage of air across it
at all times.
▪ Pluming may occur at the flue terminal. Positions where this could
be a nuisance should be avoided.
▪ For single wall flue pipe, the minimum distance to a combustible
material must be 25 mm.
For air intake pipe and concentric systems, the distance to a
combustible material is 0 (zero) mm.
▪ It is essential to ensure that products of combustion discharging
from the terminal cannot re-enter the building or other buildings,
through ventilators, windows, doors, other sources of natural air
infiltration or forced ventilation.
▪ Minimum flue duct length must be 50 cm.
4.8.10
Applicable flue systems
In this part, information about different flue systems are given. The
mounting instructions for correct installation of the flue systems are
included in the packaging of the flue parts as well as flue cutting
instructions where needed.
DANGER
Flue duct must incline 3° away from the unit, to allow the
condensate to drain back to the boiler and out of the
condensate drain. If the flue has an internal fall then please
follow instructions delivered with the flue parts.
NOTICE
Optional parts shown in rectangular area are used where
needed.
Type C13x (concentric flue system)
The boiler draws combustion air from outside via a concentric
coaxial pipe fitted to the external wall and expels flue gas to the
outside via the external wall.
