9
■
The equipment must be
installed in such a way that it
does not cause any hazards or
unacceptable nuisances, e.g.
due to vibrations, oscillations or
noise
■
The units must be set up and
installed in such a way that they
are easily accessible for repair
and maintenance work
■
Operating elements whose
improper operation can lead to
dangerous operating conditions
must be protected against
unauthorised operation if they
are generally accessible
■
Direct intake of outside air is
not recommended with the
standard combustion chamber.
When installing mixed air
dampers (accessories), they
must be coupled in opposite
directions.
The proportion of fresh air
supplied should not exceed
30%
■
The units may not be installed
or operated in potentially
flammable or explosive
environments or areas
if the units are installed in
rooms that have an opening or
pipe leading into the open air.
The cross-section of the
opening must be at least
150 cm
2
and 2 cm
2
more for
each kW of nominal heat
output exceeding 50 kW.
The pipes must be dimensioned
to be equivalent in terms of
flow.
The required cross-section may
be divided between a maximum
of two openings or lines.
(4) Combustion air openings
and lines must not be closed
or blocked unless special
safety devices ensure that the
combustion appliance can only
be operated when the closure
is open. The required cross-
section must not be narrowed
by the closure or grille.
(5) By way of derogation from
paragraphs 1 to 3, a sufficient
combustion air supply may
be demonstrated in another
way for room-air-dependent
combustion appliances.
For example through:
A continuous pipe of sufficient
cross-section connected to
the burner or its casing to
the outside. This cross-section
must be adapted to the
available suction power of the
burner and the line resistances
(including the intake guard)
so that proper combustion is
ensured.
Set-up
■
The units must then only be
installed and operated in areas
where the units can be supplied
with an adequate amount of
air for the combustion and the
exhaust gases can be routed
to the outside via a suitable
exhaust gas system
■
Room-air dependent units
may only be installed in rooms
or buildings from which air is
extracted by means of fans,
such as ventilation or exhaust air
systems, etc., if:
1. Simultaneous operation of
the unit and the air extracting
system(s) is prevented by safety
devices,
2. The exhaust gas routing is
monitored by special safety
devices,
3. The exhaust gases from
the unit are discharged via the
air extraction system(s) or
4. The design or dimensioning
of the system ensures that no
dangerous negative pressure
can occur
■
The units must be set down
stably on a non-combustible
surface away from traffic zones
- also by crane, for example
■
The units must be installed and
operated in such a way that
personnel are not endangered
by exhaust gases and radiant
heat and no fires may occur
CAUTION
The standard version of
the units is not suitable for
exclusive use as supply air
units.
NOTE
The units are suitable for use
with accessories on the intake/
outlet side.
