Wolf MGK-130 Technical Manual And Installation Instructions page 44

General information
Where necessary, adapt the installation examples to the
relevant Building Regulations and requirements of 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 13384-1.
The requirements for installation rooms are specified
in Building Regulations or Combustion Equipment
Ordinances of the relevant countries. Observe all
local regulations regarding the room ventilation.
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. Use on-site measures to
prevent ice from falling, e.g. the installation of
a snow guard.
Flues must not be routed through other
installation rooms without ducts, 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
NB
chimneys that used to carry flue gases from
oil or solid fuel boilers.
Secure the balanced flue or flue that is 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.
To prevent flue gas escaping, a positive
pressure flue cascade is only permitted with
a tested flue gas damper (part no. 2482896).
For the MGK-130, this is already integrated.
44
Engineering information,
combustion air / flue gas routing
Connection to a combustion air and flue system
type C63 that has not been tested together with
the gas combustion equipment.
Original Wolf components have been optimised over many
years and are matched to the use with Wolf condensing
boilers. When using third party equipment that is only
CE-designated, the installer will be responsible for the
correct sizing and perfect function of such systems. Faults,
material losses and injuries resulting from incorrect pipe
lengths, excessive pressure drop, premature wear with
escaping flue gas and condensate or incorrect function,
e.g. through components working themselves loose, are
excluded from our warranty if non-CE-approved third
party equipment is used.
In addition to the boiler connection bend, a maximum of
two 90° diverters may be installed.
The duct must be free from contamination, if the
combustion air is drawn from it.
Connection to the ventilation air system and the flue
The unobstructed cross-section of flues must be able
to be inspected. Therefore, install an inspection and/
or test 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.
As protection against contamination during the building
phase, we recommend the use of the complete ventilation
air filter for MGK-130 to 300 (part no. 9751390). The
ventilation air filter is plugged into the air intake.
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.
Generally bevel or deburr trimmed flues to
NB
ensure a gas tight installation of pipe joints.
Ensure that gaskets are correctly fitted.
Remove all contamination prior to installation
- never fit damaged parts.
When sizing flue gas systems in accordance
NB
with EN 13384-1, maintain a maximum back
pressure of up to 130Pa in to header line; this
should also not be exceeded.
Keep the door of the condensing boiler shut
NB
during the building phase. After completing the
building phase, remove the filter.
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