19
3.2.9 Flue system with split pipes 80 mm
diameter (type B accessories)
NB: Maximum flue system load loss,
according to installation, must
correspond to values indicated below.
For flue system with a load loss value
not exceeding 40 Pa, the 44mm
diaphragm in BTFS 28 model and the 46
mm diaphragm in BTFS 24 model must
be installed as shown in pic. 11
(diaphragms are supplied with boiler).
IMPORTANT
Should flue system cross walls and/or
infrastructure or if it easily accessible, it
is mandatory to install an appropriate
thermal insulation.
During the boiler functioning the duct
can reach very high temperatures (more
than 120 °C).
pic. 11
Diaphragm
Diaphragm
Neoprene
seal
∆
P max = 40 Pa
SPLIT DUCTS FLUE SYSTEM INSTALLATION SAMPLE
pic. 12
DIMENSIONS FOR CONNECTION OF THE FLUE
GAS OUTLET WITH SPLIT DUCTS
Summary of Contents for NIAS BTN 28
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