BLUEHELIX TECH RRT 24 H
164 EN
cod. 3541C661 - Rev. 00 - 10/2018
2.6 Fume ducts
B
THE BOILER MUST BE INSTALLED IN PLACES THAT MEET THE FUNDAMENTAL REQUIREMENTS
FOR VENTILATION. OTHERWISE THERE IS A DANGER OF SUFFOCATION OR INTOXICATION.
READ THE INSTALLATION AND MAINTENANCE INSTRUCTIONS BEFORE INSTALLING THE UNIT.
ALSO FOLLOW THE DESIGN INSTRUCTIONS.
IN CASE OF PRESSURES ABOVE 200 Pa INSIDE THE FUME EXHAUST PIPES, CLASS "H1” FLUES
MUST BE USED.
Important
The unit is “type C” with sealed chamber and forced draught; the air inlet and fume outlet must be connected to one of
the following extraction/suction systems. Before installation, check and carefully observe the above prescriptions. Also,
comply with the provisions concerning the positioning of wall and/or roof terminals and the minimum distances from win-
dows, walls, vents, etc.
Connection with coaxial pipes
fig. 22 - 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. 23- Starting accessories for coaxial ducts
Table. 3- 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
041006X0 041084X0041083X0
Ø 80
Ø 127
120
147
Ø 100
Ø 60
Ø 60
Ø 100
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