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Description
Heat exchanger
Heating coil: 34 m long - Content: 5 l of water – Heating capacity: 70 k W
The heat exchanger is heated by a high pressure fan heater.
A ventilator (1) draws in the cold, fresh air from the bottom end of the machine and forces
it upwards between the outer mantle (2) and the inner mantle (3). In the process, the
fresh air is pre-heated and the outer mantle of the heat exchanger is cooled.
The pre-heated air is pressed through a mixing unit (4). Here finely atomised fuel is
injected via a nozzle (5) and mixed with the air. The electrodes (6) located below then
ignite the fuel-air mixture.
The flame burns from top to bottom, turns round and the hot gas flows past the heating
coil (7) on its way back up. The burned gases collect in the exhaust chamber and are
emitted from the chimney (8).
The water is forced through a heating coil by the high pressure pump. Hot air flows
around the coil, as described above.
The fuel pump (9) draws the oil through a filter (10) and pumps it to the injector nozzle (5).
The surplus quantity of fuel flows straight back into the tank. The oil pressure (approx. 10
bar) is shown on the fuel manometer (11).
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