Eberspracher Airtronic D5 Service Manual download pdf (Page 10)

10 | PRODUCT INFORMATION

2 | HYDRONIC: TECHNICAL ASPECTS

DESCRIPTION OF FUNCTIONS FOR HYDRONIC L:

Combustion air is conveyed into the combustion chamber by fan motor and impeller.

Fuel is pumped by a gear pump from the vehicle tank and pressure is built up against the closed solenoid valve.

The solenoid valve is opened and the fuel is atomised through the fuel nozzle into the combustion chamber / flame tube.

The fuel/air mixture is ignited by the ignition spark transducer.

Once the flame has been detected by an optical flame sensor, the ignition spark transducer is turned off, the heat transferred via the heat exchanger to

the cooling water and the exhaust is discharged through the exhaust silencer.

The cooling water circulation pump conveys cool water into the heater which is heated by the heat exchanger and subsequently conveyed to the vehicle

heat exchanger and combustion engine.

Electric

motor

Control box

with integrated

flame sensor

Combustion

air inlet

Fuel

connection

Water outletWater inlet

Heat exchanger

Combustion

chamberFuel nozzle

Ignition spark transducer

with ignition

electrodes

Exhaust

outlet

Integrated

fuel pump with

solenoid valve

Maintenance-

optimised

burner head

Combustion

air impeller

Temperature

sensor

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 147 148

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Eberspracher Airtronic D5 Service Manual Page 10

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