BLUEHELIX TOP RRT K 50
228
EN
cod. 3541Q281 - Rev. 02 - 10/2020
Connection with coaxial pipes
fig. 21 - Examples of connection with coaxial pipes (
= Air /
= Fumes)
For coaxial connection, fit the unit with one of the following starting accessories. For the wall hole dimensions, refer to
the figure on the cover. Any horizontal 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 dripping.
fig. 22- Starting accessories for coaxial ducts
Table 4- Max. length coaxial ducts
Coaxial 60/100
Coaxial 80/125
Max. permissible length (horizontal)
7 m
20 m
Max. permissible length (vertical)
8 m
Reduction factor 90° bend
1 m
0.5 m
Reduction factor 45° bend
0.5 m
0.25 m
C
1X
C
1X
C
3X
C
3X
C
3X
C
1X
041006X0
041084X0
041083X0
Ø 80
Ø 127
120
147
Ø 100
Ø 60
Ø 60 Ø 100