Ferroli BlueHelix HiTech RRT H Instructions For Use, Installation And Maintenance page 322

In case of installation with maximum resistance (coaxial or separate flue) it is advisable to
carry out a calibration procedure [AUTO SETUP] to optimize boiler combustion.
Connection with coaxial pipes
fig. 30- Examples of connection with coaxial pipes (
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.
Ø 100
Ø 60
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Table 5- Max. length coaxial ducts
Max. permissible length (horizontal)
Max. permissible length (vertical)
Reduction factor 90° bend
Reduction factor 45° bend
322
BlueHelix HiTech RRT H
Ø 127
Ø 80
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fig. 31- Starting accessories for coaxial ducts
Coaxial 60/100
All models 7 m
All models 8 m
1 m
0.5 m
cod. 3541V481 - Rev. 00 - 06/2021
= Air / = Fumes)
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Coaxial 80/125
BLUEHELIX HITECH RRT 18 H = 28 m
BLUEHELIX HITECH RRT 28 H = 20 m
BLUEHELIX HITECH RRT 34 H = 20 m
0.5 m
0.25 m
EN