6
The units must be set up and operated in such a
way that people are not exposed to exhaust or radi-
ant heat and fires cannot occur.
The units must be set up in such a way that they do
not cause any hazards or unreasonable annoy-
ances, e.g. tremors, vibrations or noise.
The units must be set up and installed in such a way
that they are easily accessible for monitoring, repair
and maintenance work.
Operating elements which can result in dangerous
operating conditions when used improperly must be
protected from unauthorised operation if they are
generally accessible.
We do not recommend suctioning in outside air di-
rectly with the standard combustion chamber. When
mounting the mixed air flaps (accessories), they
must be attached in the opposite direction. The per-
centage of fresh air supplied may not exceed 30%.
The units may not be set up or operated in rooms or
areas susceptible to fire or explosions.
The units are not suitable exclusively for use
as air supply units.
Heating Rooms
The units only may be operated in closed rooms or
warehouses if they have been equipped with a suitable
room temperature control thermostat (room thermostat).
Fuel Supply
Particularly for heating oil lines, make sure that the
cross-section of the lines corresponds to the suction
height, the total line resistance and increased viscosity
at lower temperatures and, if necessary, it is possible to
connect an oil transport device.
The lines must be placed in such a way that they are
easily ventilated and are protected from corrosion and
mechanical damage.
The measured pressure of the suction line should
not exceed -0.3 bar. It may be a maximum of -0.4 bar.
Power Supply
Prior to performing the electrical installation in line with
local requirements, check whether it is possible for even
a temporary power overload to cause an impermissible
undervoltage.
An easily accessible emergency switch must be at-
tached in the setup room, but not close to hazardous
areas.
Air Supply for Combustion
An adequate supply of air for combustion must be en-
sured by meeting the relevant building requirements.
Excerpts from the German fire ordinance:
For furnaces with a total rated heat output of up to 35
kW that are dependent on the air in the room, evidence
of an adequate air supply for combustion has been pro-
vided if the furnaces are set up in a room that has:
1. A minimum of one door to the outside or a window
that can be opened (rooms with a connection to the
outside) and a room capacity of at least 4 m
3
per
kW of total rated hear output or
2. An opening leading to the outside with a cross-
section of at least 150 cm
2
or two openings which
are each 75 cm
2
or lines to the outside with equiva-
lent cross-sections for air flow.
Combustion air openings and lines may not be closed
or blocked unless the safety mechanisms can ensure
that the furnace can only be operated when the flap is
closed. The required cross-section may not be con-
stricted by the flap or the grille.
As an exception to Paras. 1 and 2, for furnaces de-
pendent on air in the room, evidence of an adequate air
supply for combustion can be provided other ways.
For example by:
A continuous line to the outside with a sufficient
cross-section that is attached to the burner or its lin-
ing. This must be adjusted to the suction capacity of
the burner and the line resistances (including the
protective air suction grille) so that combustion is
assured.
Setup on the Ground
The units must be placed firmly on non-flammable sur-
face outside of traffic zones, e.g. away from cranes.
A safety zone of 1 m must be maintained around the
units to protect them from damage in commercial
rooms, to ensure unhindered access for maintenance
and repair work on the unit and burner and, if neces-
sary, to prevent air intakes and outlets from blockage.
This safety zone is to be identified with a warning sign
that says:
Maintain a Safety Zone of 1 m
We recommend clearly marking heavily trafficked ar-
eas.
These units have not been designed for heating
private residences or similar spaces.
