m
In V+H operating mode, the fan runs continuously. This
also applies when the burner switches off after reaching
the predefined room temperature.
m
In H operating mode, the fan only operates when the
combustion chamber is sufficiently heated. When the
predefined room temperature is reached, the burner
switches off and the fan keeps running until the combustion
chamber has cooled down completely.
In case of a failure of the air heater during start-up or operation,
please refer to the "FAULTS AND TROUBLESHOOTING" chapter to
find the cause for the malfunction.
m
After a safety shutdown of the burner, the lamp/button
(m) lights up and the burner reset button (m) must be
pressed and held for three seconds to be able to restart
the air heater.
m
After a safety shutdown caused by the safety thermostat
(indicator light h), you have to press the reset button (i) to
be able to restart the air heater.
m
Never carry out more than two consecutive restarts.
Unburned fuel oil can accumulate in the combustion
chamber and might suddenly ignite during the
subsequent restart.
4.2 SWITCH-OFF
To switch the device off in case of manual operation, set the main
switch (a) to "0". For automatically operated devices, the room
thermostat must be used.
The burner stops (indicator light h goes out) while the fan keeps
running. The fan switches on and off several times until the combustion
chamber has cooled down completely.
m
The air heater's operation must not be stopped by simply
removing the plug from the supply control panel. The
electrical supply may only be interrupted after the fan has
come to a standstill.
4.3 VENTILATION
If you want to use the air heater for continuous ventilation only, set
the switch (a) to "V".
4.4 TEMPERATURE CONTROLLER
The air heater is equipped with a temperature controller (g) with
LCD display that can be used to display and control the following
parameters:
• Detection of the air outlet temperature
• Recording of the operating hours
• Control of the trigger temperature of the fan thermostat
• Control of the trigger temperature of the burner thermostat
Detection of the air outlet temperature
The detected temperature [°C] is shown on the display:
Recording of the operating hours
If you press the button (a) twice, the operating time in hours [h] will
be displayed:
m
The indicated time is not the effective heating time but
the time during which the device has been supplied with
current and switched on.
Proceed as follows to reset the counter:
• Turn the device's main switch to "0" (OFF).
• Press and hold the P button of the temperature controller for at
least three seconds. The word "PASS" flashes for five seconds.
• Enter the code "-481". To do so, repeatedly press the button (b)
until the desired character appears. Then press the P button to
confirm and move to the next character.
• Finally, press the U button: The air outlet temperature is displayed
again.
4.5 CONTROL OF THE TRIGGER TEMPERATURE OF THE FAN
THERMOSTAT
Control of the trigger temperature of the fan thermostat
The temperature controller is programmed in a way that it
automatically switches the main fan on or off depending on the
temperature set for the combustion chamber. This prevents cold air
from being blown out when the burner starts and the combustion
chamber is not yet sufficiently heated.
It also guarantees a discharge of the internal residual heat upon
switch-off.
The default temperature setting is 35 °C with a hysteresis of 5 °C.
A -
5
Operating manual – IDS 900
EN
