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MODENA 80 E
13
3.02 Restrictor
For boiler operation, the restrictor supplied with the unit must be mounted following the instructions below.
Determine the correct size of flue restrictor required. Before inserting the flue gas duct in the boiler, check that the
restrictor fitted is correct and that it is correctly positioned (see fig. 18).
N.B.: the diameter of the hole is stamped
on the restrictor
Boiler is fitted with Ø45 restrictor as
standard
Holes Ø : 45 47 50
Ø
Fig. 18
Choice of restrictor:
With concentric pipes: - up to 1m long + one bend, use the 50 mm restrictor.
- for flue lengths over 1 meter, use no restrictor.
With separate pipes: - Calculate the total flow resistance of the air and flue pipes in metres
(cap. 3.08.2)
- utilise the table shown above to choose the more suitable restrictor for
the flow resistance calculated
METSYSEPIPOWTROFROTCIRTSER
E08ANEDOMNO
ecnatsiserwolflatoT
metsyseulffo
esU
rotcirtser
ezis
muminimmumixammm
m0m3154
m31m3274
m32m8305
m83m84rotcirtseron