Ferroli BLUEHELIX TECH RRT 30 H Instructions For Use & Installation page 172

Connection to collective flues
C
fig. 28- Examples of connection to collective flues (
Table. 8 - Typology
Type Description
C2X Intake and exhaust in common flue (intake and exhaust in same flue)
C4X Intake and exhaust in common and separate flues, but undergoing similar wind conditions
C8X Exhaust in single or common flue and wall intake
B3X Intake from installation room by means of concentric duct (that encloses the exhaust) and exhaust in common flue with natural draught
IMPORTANT- THE ROOM MUST BE PROVIDED WITH APPROPRIATE VENTILATION
C93 Exhaust to a vertical terminal and intake from existing flue.
If the boiler is to be connected BLUEHELIX TECH RRT 30 H to a collective flue or to a single flue with natural draught,
the flue or chimney must be expressly designed by professionally qualified technical personnel in conformity with the
current regulations and be suitable for sealed chamber units equipped with fan.
Backflow preventer valve
The boiler BLUEHELIX TECH RRT 30 H is equipped as standard with a backflow preventer valve (anti-backflow sys-
tem), therefore it can be connected to a positivepressure collective flue system, only if using G20 gas.
172
C
8X
93
cod. 3541C670 - Rev. 00 - 05/2018
BLUEHELIX TECH RRT 30 H
C
2X
C
93
= Air /
C
4X
= Fumes)
EN