IHL_UDARA_2016_11_04_BEGB
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4.2.4 Concentric systems (C12/C32)
The fl ue gas outlet (FGO) pipe is surrounded by the
combustion air supply (CAS) pipe with regard to a
concentric fl ue gas outlet system. Multicalor carries a
full range of concentric pipes.
The Y-pipe supplied with the fl ue gas outlet terminal
must be positioned on top of the appliance with regard
to a concentric connection.
Always position a measuring point in the concentric
piping, by preference, immediately after the Y-pipe or,
if this is not possible, as close as possible to the
appliance.
L
L1
L2
1
Legend
Number Meaning
1 Measuring point
The length of the fl ue gas outlet plus the equivalent
length of the bends must not exceed the maximum
value specifi ed in item 4.2.7.
4.2.5 Chimney renovation (C92)
It is sometimes interesting to install a special fl exible
fl ue gas outlet pipe with a diameter of 80 mm in an
existing fl ue gas outlet (conventional) fi replace. The
combustion air can then be supplied through the air
cavity between the fl ue gas outlet pipe and the existing
chimney or in the room itself. The connection between
the fl exible pipe in the old fl ue gas duct and the
appliance can then take place in parallel or
concentrically.
L1L3
L2
1
Legend
Number Meaning
1 Measuring point
The length of the fl ue gas outlet plus the equivalent
length of the bends must not exceed the maximum
value specifi ed in item 4.2.7.
Warning!
Do not use the old fl ues as combustion air supply if
they have been used in the past as the FGO for fuel
oil appliances, coal or wood burners or fi replaces.
If you want to use this system, the existing fi replace
must at least measure 150 mm x 150 mm when using
a discharge pipe with a diameter of 80 mm.
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