41
Bentone B40 MF/B45-2 MF
For installers
4
3
2
1
5
The burner is equipped with a preheater to allow the combustion of oil with a
higher viscosity.
The preheater is provided with an operating thermostat that has two cut-off
temperatures. The lower of the cut-off temperatures is preset to around 30
°C lower than the second cut-off temperature, which is adjustable.
The adjustable cut-off temperature is the desired temperature of the oil in
order to ensure good operation of the burner.
The lower cut-off temperature is used as a condition to enable the burner
to start its motor and to start pre-ventilation and oil priming. This feature
enables the burner to stop during pre-ventilation/fl ushing without trying to
establish a fl ame. This sequence occurs because the temperature of the
preheater has fallen below the cut-off temperature. When this occurs, the
burner stops and waits for the temperature in the preheater to be suffi ciently
high again.
The lower cut-off temperature also has the function that, if the temperature in
the preheater drops below the lower cut-off temperature when the burner is
in its operational phase, the burner stops. This is a safety feature to prevent
poor combustion when the preheater, for any reason, is unable to keep the
oil at a suffi ciently high temperature. If the burner stops during operation
because the temperature in the preheater is too low, preheater function
should be checked. Check, for example, safety thermostats, power to the
immersion heater(s), function immersion heater(s), etc.
6. Preheater
6.1 Technical data preheater
Connected output 3x2 kW
Voltage
3N ~ 400 V
Current 3x10 A
Resistance 3x22.5 Ω
Oil fl ow at 80 °C
100 kg/h
Overheating protector
240°C cut-off temperature
1. Contactor
2. Operating thermostat
3. Immersion heaters
4. Connection points oil
5. Overheat protection
To Next Page
Loading...