How a Webasto Airtop Heater Works
- Heating Air Inlet
- Hot Air Fan
- Motor
- Combustion Air Fan
- Glowpin/Flame Detector
- Heat Exchanger
- Burner Chamber
- Heater Body
- Hot Air Outlet
- Overheating Sensor
- Exhaust
- Fuel Line
- Combustion Air Intake
- Control Unit
When the unit is switched on, the dosing pump feeds fuel from the vessel fuel tank to the heater. Here the fuel is automatically ignited by means of a glow plug. If combustion does not occur immediately, the unit automatically repeats the start-up procedure.
In the combustion chamber, a flame is lit which heats up the heat exchanger. The unit takes air in from the outside for combustion purposes and the combusted exhaust air is discharged to the outside.
During heating, the integrated fan takes in the air to be heated through the inlet and feeds it through the unit. As the air flows through the heat exchanger, it heats up and is then blown out. The connected hot air pipes now spread the air evenly throughout the vessel interior.
Due to the unit’s own separation of the combustion cycle from the heat cycle, there is no impairment of the quality of the hot air. A temperature sensor (not HL90) constantly measures the interior temperature and adapts the heating level by automatically adjusting the amount of air passing
After the unit has been switched off, the combustion process is terminated in a controlled manner. For this purpose, the unit briefly goes into shut-down mode to cool itself down. It is then immediately ready for restarting.
How a Webasto Thermo Heater Works
When the unit is switched on, the dosing pump feeds fuel from the vessel fuel tank to the heater. Here the fuel is ignited automatically. If combustion does not occur immediately, the unit automatically repeats the start-up procedure.
In the combustion chamber, a flame is lit which heats up the heat exchanger. The unit takes air in from the outside for combustion purposes and the combusted exhaust air is discharged to the outside.
During heating, an internal circulation pump feeds the water-glycol mixture through the unit. As the water flows across the heat exchanger it heats up. In the connected water circulation system, heat exchangers then transfer the energy to the interior. Once the vessel interior has warmed up, the heat requirement is reduced and the water temperature continues to rise.
At a pre-set temperature threshold, the unit reduces output at this moment or goes into standby mode. The heating procedure automatically restarts when the water temperature drops below a certain level. The unit thus adapts the heat output automatically to the heat requirement.
After the unit has been switched off, the combustion process is terminated in a controlled manner. For this purpose, the unit briefly goes into shut-down mode to cool itself down. It is then immediately ready for restarting.