Webasto Air Top 2000 S D Manual de servicio descargar pdf (Pagina 12)

General description Air Top 2000 ST

202

2.2 Heat exchanger

The heat generated by the combustion process is

transferred to the air transported by the combustion and

hot air blowers in the heat exchanger.

Fig. 204 Heat exchanger

2.3 Burner insert with combustion

chamber

The fuel is distributed over the burner cross-section in the

combustion chamber in the burner insert. The mixture of

fuel and air burns in the combustion chamber, thus causing

the heat exchanger to become hot.

Fig. 205 Burner insert with combustion chamber

2.4 Control unit

The control unit is the central component for ensuring the

function is maintained and for monitoring the heater’s

operation. A temperature sensor in the control unit is

designed to control the room temperature. An external

temperature may also be connected to all the heaters.

If a fault occurs, an error code will be output in the display

of the combination timer.

If the heater has a control element, the ON control light will

flash.

In addition the heater can be checked using a personal

computer (see PC heater diagnostic operating manual).

Fig. 206 Control unit

2.5 Flame monitor (only petrol heater)

The flame monitor is a low-ohm PTC resistor, which changes

its resistance depending on the heat emitted by the flame.

This change in resistance is analysed by the control unit so

that the flame status is monitored whenever the heater is

operating.

Fig. 207 Flame monitor

Combustion

chamber

Burner insert

Wiring

harness

Internal temperature

sensor

Component

plug

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 69 70

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Webasto Air Top 2000 S D Manual de servicio Pagina 12