4 Installation
Installation manual
20
D2C20ND0 D2C24ND035A5AA
Wall-mounted condensing boiler
3P469346-10J – 2018.05
h
L
i
j
a
b
c
b
d
e
f
g
a
Flex kit PP Dn 60-80 or Dn 80
b
Spacer
c
Extension Flex PP 80 mm
d
Connector Flex-Flex PP 80 mm
e
Chimney connection 60/100 or 80/125
f
90° elbow 60/100 (boiler outlet)
Optional:
g
Inspection elbow 60/100
h
30° elbow 60/100
i
45° elbow 60/100
j
Extension 80/125
L = 500-1000 mm
Instead of 60/100, 80/125 flue ducts can be used at the outlet of the
boiler. In that case, the parts below are used:
a
b
c
d
e
a
60/100 to 80/125 adapter
b
90° elbow 80/125
c
45° elbow 80/125
d
30° elbow 80/125
e
Extension 80/125
L = 500-1000 mm
Allowable flue length for C93x
Shaft
Chimney
cross-
section
Parameter
C3
“3”
“5”
60-100
Concentric
circular and smooth
100
8.0
21
DN 60 Flex
circular and rough
106
3.7
9.8
DN 60 Flex
circular and rough
100
2.7
7.0
DN 60 Flex
square and rough
95
3.8
9.9
DN 60 Flex
square and rough
90
2.8
7.4
80-125
Concentric
circular and smooth
124
34
100
DN 80 Flex
circular and rough
140
18.2
53.5
Allowable flue length for C93x
DN 80 Flex
circular and rough
130
11.6
34.1
DN 80 Flex
circular and rough
120
4.4
13.0
DN 80 Flex
square and rough
140
23.8
69.9
DN 80 Flex
square and rough
130
20.6
60.6
DN 80 Flex
square and rough
120
14.8
43.5
DN 80 Star
square and rough
140
58
169.5
DN 80 Star
square and rough
120
40.7
119.0
Equivalent length of options
45° elbow 60/100 mm
1.0 m
90° elbow 60/100 mm
1.5 m
45° elbow 80/125 mm
1.0 m
90° elbow 80/125 mm
1.5 m
Maximum allowable length of the flue duct up to common
chimney is 2 1 60/100 90° elbow.
Subtract equivalent length value of bends from the allowable flue
length value.
Type B53 (open flue system)
The boiler draws combustion air from the installation room and
expels flue gas through the flue to above the roof (1).
The boiler draws combustion air from the installation room and
routes flue gas through the moisture-resistant chimney to above the
roof (2).
Allowable flue length for B53
Flue duct 60 mm
15.0 m
Flue duct 80 mm
100.0 m
Equivalent length of options
90° elbow 60 mm
1.5 m
45° elbow 60 mm
1.0 m
90° elbow 80 mm
2.0 m
45° elbow 80 mm
1.0 m
Subtract equivalent length value of bends from the allowable flue
length value.