Daikin D2C20ND028A5AA Manuel D'installation page 19

Type C53x (twin pipes flue system)
Air supply and flue gas discharge from / to atmosphere in areas of
different pressure. The boiler draws combustion air from outside via
a horizontal pipe fitted to the external wall and expels flue gas to the
outside via the roof.
The terminals for the supply of combustion air and for the evacuation
of combustion products shall not be installed on opposite walls of the
building.
a
c
d
e
a Roof terminal 80 mm
b Flat roof outlet kit
c Extension 80 mm
d Air intake 80 mm
e 60/100 to 80 80 adapter
f 90° elbow 80 mm
Optional:
g Tile roof outlet kit
h 45° elbow 80 mm
i 90° elbow 80 mm
j Extension 80 mm
L = 500-1000-2000 mm
Allowable flue length for C53x
Air intake duct 80 mm
Flue outlet duct 80 mm
Equivalent length of options
45° elbow 80 mm
90° elbow 80 mm
D2C20ND028A5AA + D2C24ND035A5AA
Wall-mounted condensing boiler
3P469346-10J – 2018.05
g
b
f
h i j
c
L
54 m
54 m
1.0 m
2.0 m
Subtract equivalent length value of bends from the allowable flue
length value.
Note: The air intake length is 3 metres. In case of longer air intake
use, flue outlet duct length must be shortened with the same length.
Type C83x (twin pipes flue system)
The boiler draws combustion air from outside via a separate supply
pipe routed through the external wall, and expels flue gas to a
shared flue system.
The multi served chimney is a system that is part of the building and
has a separate CE marking. The connection between the boiler and
the shaft and, the connection between the boiler and the air intake
system must be obtained via Daikin.
In C83x type units, condensate flow into the unit is not allowed.
a b c
a Wall plate
b Extension 80 mm
c 60/100 to 80 80 adapter
d 90° elbow 80 mm
e Air intake 80 mm
Optional:
f 45° elbow 80 mm
g 90° elbow 80 mm
h Extension 80 mm
L = 500-1000-2000 mm
Type C93x
The boiler draws combustion air from the outside through the
annular gap in the shaft (chimney) and expels the flue gas via the
flue pipe to above the roof.
4 Installation
d d e
f g h
L
Installation manual
19