22
AIR-FLUE GAS CONNECTION
For information on how to set up the air-flue gas connection
ducts and the installation rules, see the De Dietrich “flue
system” brochure. Nevertheless the local regulations have to
be respected.
Classification
2
6
7
2
2
1
1
2
8
MCA_F0171
L max
L max
L max
L
max
C33
C13
C33
B23
B23P
B23P
C33x
C13x
MC
A_F0
17
1
�
Configuration C
13(x)
:
Air-flue gas connection via concentric ducts to a
horizontal terminal ("forced flue")
Note: this configuration is prohibited in establishments open to the general public.
�
Configuration C
33(x)
:
Air-flue gas connection via concentric ducts to a vertical
terminal
(roof outlet)
�
Configuration B
23P
/B
33
:
Connection to a chimney (combustion air taken from
within the boiler room)
�
Configuration B
23P
:
For cascade installation
�
Configuration B
23
:
Connection of a single boiler or boilers in cascade
configuration to a negative pressure flue gas duct, which is not sensitive to
humidity, with the combustion air being taken in the boiler room.
Important:
Please be reminded that page 29 gives the installation rules for sealed appliance terminals (type C) with total output
�
70 kW
installed in a boiler room and using gas type fuels.
Reminder:
For type B
23
and B
23P
configurations mixed use of materials is prohibited
Table of maximum permissible air-flue gas duct lengths based on the configuration type
Type of air-flue gas connection
Lmax
=
Maximum length of the connection ducts in m
INNOVENS PRO MCA 160
Concentric pipes connected to a concentric horizontal terminal
C
13x
Ø 110/150 mm
6
Separate pipes connected to a concentric horizontal terminal
C
13
Ø 150 mm (Alu)
20
Ø 160 mm (PPs)
20
Concentric pipes connected to a concentric vertical terminal
C
33x
Ø 110/150 mm
6
Separate pipes connected to a concentric vertical terminal
C
33
Ø 150 mm (Alu)
20
Ø 160 mm (PPs)
20
In chimney
(combustion air taken from within the premises)
B
23P
/B
33
Ø 150 mm (Alu)
40
Ø 160 mm (PPs)
50
Note:
Configuration B
23p
(
�
): it is not necessary to fit a shut-off damper for the flue gas as this is already integrated into the INNOVENS
PRO MCA 160 boiler.
Note
:
is measured by adding the lengths of the straight air/flue gas pipes and the equivalent lengths of the other components:
- Ø 110/150 mm (PPs): 1 elbow at 87° = 3.7 m, elbow at 45° = 1 m,
1 inspection T = 2.5 m, 1 straight inspection tube = 1 m
- with Ø 150 mm (PPs): 1 elbow at 87° = 6.4 m, 1 elbow at 45° = 1.7 m
1 inspection T = 6.4 m, 1 straight inspection tube = 0.5 m
- with Ø 160 mm (PPs): 1 elbow at 87° = 5 m, 1 elbow at 45° = 1.4 m
1 inspection elbow = 5 m, 1 inspection tube = 0.9 m