250
< 400
< 400
a
b
250
< 400
250
e
d
c
250
Hatched area
Floor of a heat-resistant design
Grey central area Boiler supporting surface
Foundation properties
Trade name
Vitoflex 300-UF
Rated heating output
kW
390
530
720
950
1250
a
mm
1026
1026
1112
1360
1360
b
mm
1826
1826
1912
2160
2160
c
mm
4221
4721
4912
5096
5641
d
mm
1260
1260
1400
1630
1630
e
mm
2561
3061
3112
3066
3611
Requirements of the Muster-Feuerungsverordnung [M-FeuVo Sample Combustion Ordinance - Germany]
Observe the specific building regulations and fire regulations in your
country. The installation room must meet the standards laid down by
the "Muster-Feuerungsverordnung".
Combustion appliances for solid fuels with a total rated heating out-
put of more than 50 kW and which are to be operated simultane-
ously, may only be installed in special rooms (boiler rooms).
Recommendation
Consult your local flue gas inspector.
Emergency stop switch
On combustion equipment for solid fuels with a rated heating output
above 50 kW, it must be possible to switch off the burner, fuel supply
equipment and burner control units at any time by means of an
emergency stop switch located outside the installation room. Provide
a sign adjacent to the emergency stop switch that reads "EMER-
GENCY STOP SWITCH – COMBUSTION EQUIPMENT".
Combustion air supply
For open flue combustion equipment with a total rated heating output
in excess of 35 kW, the combustion air supply is deemed to have
been verified if the combustion equipment is located in areas which
provide an aperture or duct leading outdoors.
At 35 kW rated heating output, the cross-section of the aperture
must be at least 150 cm
2
. For every kilowatt rated heating output in
excess of 35 kW, the aperture must be 2 cm
2
larger than stated
above.
Pipes must be sized to provide equivalent flow rates. The required
cross-section may be split over up to 2 apertures or pipes.
A
A = 150 cm² + 2 kW
cm² x (Σ
²
n – 35 kW)
Σ
²
n
= sum of all rated heating outputs in kW
Design information
(cont.)
86
Viesmann
VITOFLEX 300-UF
9
5682428
