5
Selecting the Setup Location
When selecting a location to set up the units, the re-
quirements must be adjusted with respect to:
◊
Fire protection and operating hazards.
◊
Function.
When the units are used to heat rooms, when it is
necessary to adjust to the amount of pressure in the
room, etc.
◊
Operating needs.
Heating requirements, rated air output, need for cir-
culation or outside air, humidity, room temperature,
air distribution, space needs, etc.
◊
How the unit is connected to the exhaust system.
◊
Access for monitoring, assembly, repair and mainte-
nance work.
◊
Ratio of room volume to total rated air capacity espe-
cially for naturally ventilated rooms.
Prior to Assembly
When setting up the units, the relevant regional building
and fire protection codes of the respective region must
be observed.
Operation
After switching on the unit by setting the operating
switch to “Heizen” (heating), the forced-air burner turns
on automatically. The combustion chamber with heat-
exchanger now heats up until the target temperature is
reached.
After the set target temperature is reached, the air sup-
ply fan switches on automatically. Warm air is blown
out.
If heating mode is controlled via a room thermostat or
other temperature regulating device (operating switch
set to “Heizen” (heating), the units function fully-
automatically based on amount of heat required.
All of the unit functions are performed automatically and
monitored by the automatic burner relay (part of the
forced-air burner) and the integrated temperature con-
trol thermostat.
After the device is switched off with the operating switch
or the room thermostat, the air supply fan runs for a cer-
tain amount of time to cool the combustion chamber
with heat-exchanger and then switches off. This proc-
ess can be repeated several times.
Units with a rated heat output of up to 50 kW may usu-
ally be set up outside of heating rooms when the Ger-
man ordinance on heating systems is observed. Units
with a rated heat output of more than 50 kW must be
set up in heating rooms.
As an exception to this, heating appliances for solid, liq-
uid or gaseous fuels with a total rated heat output of
more than 50 kW may also be set up in other rooms if
their use requires this (e.g. single heating appliances
such as fan heaters) and these heating appliances can
be safely operated.
Here, the German state building authorities’ “Guidelines
for setting up furnaces with a total rated heat output of
more than 50 kW in rooms other than heating rooms”
must be observed.
The guidelines prohibit erecting furnaces when poten-
tially dangerous concentrations of hazardous sub-
stances are present in accordance with the substance
ordinance.
The dangerous concentration must be checked in the
setup room and any accessible adjacent rooms to see
whether the prohibition applies.
In rooms where highly flammable materials or mixtures
are being processed, stored or produced in quantities
that are hazardous should they ignite, exceptions may
be made if appropriate measures are taken to ensure
that the heating appliances cannot cause the materials
or mixtures to catch fire.
Safety Facility
If the flame burns irregularly or goes out, the unit is
switched off by the automatic burner relay. The unit may
only be restarted after the automatic burner has been
manually released.
The temperature monitor (TW) regulates the tempera-
ture of the unit as well as the outgoing air current via the
burner in heating mode. The temperature control ther-
mostat (TR) regulates the fan.
The safety temperature limiter (STB) interrupts opera-
tion of the unit or burner when extreme overheating oc-
curs or if the TW ceases functioning. The STB can only
be manually released after the unit has cooled.
G
Before the STB is released (to restart operation),
the reason the STB was activated must be deter-
mined.
For units in the 400 V series, the fan motor is also moni-
tored by a thermal overcurrent relay. If the motor be-
comes overloaded, operation is interrupted by the relay
and the red malfunction lamp “Ventilator” (fan) on the
control box lights up. Release is only possible after the
control box has been opened.
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Never interrupt (except in emergency situations)
the power supply until the cool-down phase is
completely finished.
Our guarantee does not cover damages caused to
the unit by overheating.
G
It is not necessary to limit the capacity in single-
stage burner operation for the warm air generator.
G
The unit must be set up and assembled in such a
way that it is easily accessible for monitoring, re-
pair and maintenance work.
