Never close or obstruct combustion air apertures or pipes. Use spe-
cial safety measures to ensure that the combustion equipment can
only be operated when the aperture is open.
The required cross-section must be free.
Safety precautions
For gas combustion equipment installed in rooms, fuel lines
must
be
equipped with the following safety equipment immediately upstream
of the gas combustion equipment:
■ In the event of an external thermal load in excess of 100 °C, the
fuel supply must automatically shut off.
■ Up to a temperature of 650 °C and over a period of at least 30 min,
no more than 30 l/h (measured as air flow rate) must be able to
flow through or out of the fuel line.
Combustion equipment must be installed at a sufficient distance
from combustible materials and fitted furniture, or be shielded from
them, to ensure that the temperature on such materials/furniture
does not exceed 85 °C when the combustion equipment is delivering
the rated heating output.
Room ventilation
Note
Means for adequate ventilation of the boiler room must be provided
with all automatic heating systems.
Minimum clearances
> 880
>
800
> a
>
500
Design information
(cont.)
VITOFLEX 300-UF
Viesmann
87
5682428
9
