Water heaters Application concept
Water heaters Advantages
The advantages of a Webasto water heater Supply of warmth via the air outlets in the dash board (Thermo Top Evo) Cabin heating and optional pre-heating of the engine Heating power from 2 kW up to 9 kW Less emissions due to engine pre-heating Very fast heat-up phase Quiet-running, low noise operation Diesel-operated, directly fed from the vehicle tank or electrically driven via 230 V power socket
How Webasto water heaters work When the unit is switched on, the fuel pump feeds fuel from the vehicle fuel tank to the heater. Here the fuel is automatically ignited by a glow plug. If combustion does not occur immediately, the unit automatically repeats the start-up procedure. A flame is ignited in the combustion chamber which heats up the heat and the coolant exchanger. The unit takes air 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 glycol mixture flows through the heat exchanger, it heats up. In the connected water circulation system, heat exchangers then transfer the energy to the interior and the engine. Once the vehicle interior or engine 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 re-run mode to cool itself down. It is then immediately ready for restarting.
The water heater saves space by being installed in the engine compartment
Check valve Combustion air intake Intake silencer Water pump and water inlet Exhaust pipe Fuel pipe to vehicle fuel tank
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The Thermo Top Evo can also be integrated into the existing water heating system.
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Exhaust silencer Hot water outlet
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