14.09.2020
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VARMAX -
Installation, Use and Maintenance
IMPORTANT:
The above values are provided for information purposes only. It is
important to check them with a calculation.
IMPORTANT:
The weight of flue-gas ducts must not be supported by the part
connecting to the boiler.
4.11.2.
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 certification, such as CONDENSOR (Poujoulat)
or rigid or flexible CHEMILUX CONDENSATION (Ubbink).
IMPORTANT:
The duct extracting combustion products must be sized using the
parameters provided in the table in paragraph 3.4.
Depending on the duct's actual configuration, 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.
IMPORTANT:
If several boilers are connected to the same flue, check the following
by calculation:
• One boiler at Qmin and the others at Qn
: The outlet pressure of
the boiler at Qmin must be lower than the permissible pressure
specified in the table in Chapter 3.4.
• One boiler at Qall and the others at Qn
: The outlet pressure of the
boiler at Qall must be lower than the permissible pressure specified
in the table in Chapter 3.4.
• All the boilers at Qn
: The outlet pressure of the boilers must be lower
than the permissible pressure specified in the table in Chapter 3.4.