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Page 28 / 146 00BNO9061-J
VARMAX - Installation, Use and Maintenance
Height of ue-gas duct H in linear metres (lm)
(operating at 50/30°C)
ø
connection
150 mm 180 mm 200 mm
ø
duct
180 mm 200 mm 250 mm 250 mm 300 mm
Type of gas G20 G31 G20 G31 G20 G31 G20 G31 G20 G31
MODELS
120 2 to 52 -- -- 3 to 39 -- -- -- -- -- --
140 7
to 39 -- 3 to 94 4 to 38 -- -- -- -- -- --
180 -- -- 10
to 29 -- 1 to 100 4 to 73 -- -- -- --
225 -- -- -- -- 1
to 100 3 to 65 -- -- -- --
275 -- -- -- -- -- -- 4
to 99 4 to 61 -- --
320 -- -- -- -- -- -- 5
to 81 6 to 53 -- --
390 -- -- -- -- -- -- -- -- 2
to 100 --
450 -- -- -- -- -- -- -- -- 2
to 100 --
!
IMPORTANT:
The above values are provided for information purposes only. It is
important to check them with a calculation.
!
IMPORTANT:
The weight of ue-gas ducts must not be supported by the part
connecting to the boiler.
4.10.2. Connection to a B23P chimney
Type B23P connection:
Air coming from the boiler premises, extraction of gases through the roof via
a pressurised duct.
!
IMPORTANT:
For the B23P type connection, it is MANDATORY to use ducts which
have pressurised duct certi cation, such as CONDENSOR (Poujoulat)
or rigid or exible CHEMILUX CONDENSATION (Ubbink).
!
IMPORTANT:
The duct extracting combustion products must be sized using the
parameters provided in the table in paragraph 3.3.
Depending on the duct's actual con guration, a calculation is
necessary to check that the pressures at the boiler outlet do not
exceed the maximum normative values authorised (200 Pa).
Values corresponding to the 50/30°C regime are to be used for this
calculation.
!
WARNING:
Check that there are top and bottom ventilations in the boiler premises,
that they comply with applicable regulations and that they are not
obstructed.
28


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