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With low outside temperatures, the water
vapour contained in the flue gas may condense
and freeze on the balanced flue.
This ice
may fall from the roof causing injuries or
material losses.
Prevent ice from falling by
taking on-site measures, e.g. installing a snow
guard.
Secure the balanced flue or flue outside ducts
with spacer brackets with a minimum clearance
of 50 cm from the flue outlet or upstream/
downstream of diverters to prevent the pipe
joints being pulled apart. If this is not done, there
is a danger of poisoning caused by escaping
flue gas. Furthermore, boiler damage may
result.
General notes
Where necessary, adapt the installation examples to the
relevant building regulations and requirements in your
country/region. Discuss any questions relating to the
installation of inspection covers and ventilation apertures
with your local flue gas inspector.
Flues inside chimney ducts must have secondary
ventilation along their entire length and must terminate
above the roof.
Flue gas cascades must be sized in accordance with
EN 13384-2.
The requirements for installation rooms are specified
in the building regulations or combustion equipment
ordinances of the relevant countries. Also observe
DVGW-TRGI 1986 regarding the room ventilation.
Flues outside ducts must not be routed
through other installation rooms, otherwise
there would be a risk of the transfer of
fire and there would be no mechanical
protection.
The combustion air must not be drawn from
chimneys previously used to carry flue gases
from oil or solid fuel boilers.
Caution
Original Wolf components have been optimised
over many years and are designed for use with Wolf
condensing boilers. If using third party equipment that
is only CE-approved, the installer will be responsible for
the correct sizing and perfect functioning of the system.
Faults, material losses and injuries resulting from incorrect
pipe lengths, excessive pressure drop, premature wear
with escaping flue gas and condensate or incorrect
functioning, e.g. through components working loose, are
excluded from our warranty if CE-approved third-party
equipment is used.
If the combustion air is drawn from the duct,
the duct must be free from contamination.
Connection to a type C63 combustion air and flue
system that has not been tested together with the
gas combustion equipment
The unobstructed cross-section of flues must be able to
be inspected. Therefore, install an appropriate cleaning
and/or inspection aperture inside the boiler room; agree
suitable arrangements with your local flue gas inspector.
Flue connections are created using couplings and
gaskets. Always arrange couplings against the direction
of the condensate flow.
Install the ventilation air system / flue
with a slope of at least 3° towards the gas
condensing boiler. Spacer brackets should
be fitted to secure the equipment in position.
In the worst case scenario, a lesser slope of
the balanced flue may lead to corrosion or
operating faults.
Connection to the ventilation air system and the
flue
Always bevel or deburr trimmed flues to ensure
gas-tight installation of pipe joints. Ensure
that gaskets are correctly fitted. Remove all
contamination prior to installation - never fit
damaged parts.
Caution
To prevent flue gas escaping, a positive
pressure flue cascade is only permitted with
a tested flue gas damper (part no. 2484637).
When sizing flue systems in accordance
with DIN EN 13384-2 (cascade), maintain a
maximum overpressure of up to 50 Pa in the
connection to the header line; this should also
not be exceeded.
Caution
33. Design information
Air/flue gas routing
Caution
As protection against contamination during
the building phase, we recommend using
the ventilation air filter part no. 8751390. The
ventilation air filter is plugged onto the air intake.
Keep the door of the condensing boiler shut
during the building phase. After completing the
building phase, remove the filter.
Caution
