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3.6 Fume ducts
Important
The unit is a "C type" with sealed chamber and forced draught; the air inlet and fume out-
let must be connected to one of the following extraction/suction systems. Before instal-
lation, check and carefully follow the instructions. Also, comply with the provisions on the
positioning of wall and/or roof terminals and the minimum distances from windows, walls,
ventilation openings, etc.
For the possible outlet configurations and installation distances, refer to table 7 and
table 8.
Connection with coaxial pipes
fig. 15 - Examples of connection with coaxial pipes (
Table. 2 - Typology
Type
Description
C1X
Wall horizontal exhaust and inlet
C3X
Roof vertical exhaust and inlet
For coaxial connection, fit the unit with one of the following starting accessories. Any hor-
izontal sections of the fume exhaust must be kept sloping slightly towards the boiler, to
prevent possible condensate from flowing back towards the outside and causing drip-
ping.
041001X0
fig. 16 Starting accessories for coaxial ducts
Table. 3 - Max. length of coaxial pipes
Max. permissible length (horizontal)
Max. permissible length (vertical)
Reduction factor 90° bend
Reduction factor 45° bend
Connection with separate pipes
C
5x
fig. 17 - Examples of connection with separate pipes (
46
EN
= Air /
= Fumes)
Coaxial 60/100
Coaxial 80/125
7 m
28 m
8 m
1 m
0.5 m
0.5 m
0.25 m
B
C
2x
1x
= Air /
= Fumes)
cod. 3541H114 - Rev. 01 - 11/2022
cod. 3541H114 - Rev. 00 - 11/2018
BLUEHELIX B 32 K 50
Table. 4 - Typology
Type
Description
C1X
Wall horizontal exhaust and intake. The inlet/outlet terminals must be concentric or close enough to be
undergo similar wind conditions (within 50 cm)
C3X
Roof vertical exhaust and intake. Inlet/outlet terminals like for C12
C5X
Wall or roof exhaust and intake separate or in any case in areas with different pressures. The exhaust
and intake must not be positioned on opposite walls.
C6X
Intake and exhaust with separately certified pipes (EN 1856/1)
B2X
Intake from installation room and wall or roof exhaust
IMPORTANT - THE ROOM MUST BE PROVIDED WITH APPROPRIATE VENTILATION
For the connection of separate ducts, fit the unit with the following starting accessory (Air
= - Fumes = )
Air inlet =
/ Fume outlet =
041065X0
fig. 18 - Starting accessory for separate ducts
Before installation, make sure the maximum permissible length has not been exceeded,
by means of a simple calculation:
1.
Completely establish the layout of the system of split flues, including accessories
and outlet terminals.
2.
Consult the table 6 and identify the losses in m
ponent, according to the installation position.
3.
Check that the sum total of losses is less than or equal to the maximum permissible
length in table 5.
Table. 5 - Maximum length of separate ducts
Max. permissible length
Table. 6 - Accessories
PIPE 1 m M/F
BEND 45° M/F
90° M/F
PIPE SECTION with test point
Ø 80
TERMINAL air, wall
fumes, wall with antiwind
FLUE Split air/fumes 80/80
Fume outlet only Ø80
PIPE 1 m M/F
BEND 90° M/F
Ø 60
REDUCTION 80/60
TERMINAL fumes, wall with antiwind
ATTENTION: CONSIDER THE HIGH PRESSURE LOSSES OF Ø60 ACCESSORIES;
USE THEM ONLY IF NECESSARY AND AT THE LAST FUME EXHAUST SECTION.
(equivalent metres) of every com-
eq
80 m
eq
Losses in m
eq
Air
Fume exhaust
inlet
Vertical
Horizontal
1KWMA83W
1.0
1.6
1KWMA65W
1.2
1.8
1KWMA01W
1,5
2.0
1KWMA70W
0.3
0.3
1KWMA85A
2.0
-
1KWMA86A
-
5.0
010027X0
-
12.0
010026X0 +
-
4.0
1KWMA86U
1KWMA89W
6.0
1KWMA88W
4.5
041050X0
5.0
1KWMA90A
7.0
EN
2.0
45
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