Dantherm VA-M40 MKII Service-Handbuch - Seite 13

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Combustion system

Introduction

This system consists of an oil burner , combustion chamber with heat exchanger ,

and the flue stack .

Illustration

This illustrates the combustion system:



Combustion sys-

This system consists of an oil burner , combustion chamber with heat exchanger ,

tem

and the flue stack .

The oil burner includes an electrically driven combustion air fan and a fuel pump, which

delivers diesel fuel to the nozzle where it is atomized. A certain mixture rate of com-

bustion air and atomized fuel will create a sort of gas which gives high efficiency com-

bustion without soot.

An electric transformer supplies high voltage for ignition across two electrodes upon

start up. When the flame is established the ignition ceases. The operation cycle is con-

trolled by a solid-state electronic device. During start up a 15 second pre-purge is fol-

lowed by the opening of the solenoid valve for oil atomizing and ignition. Safety shut-

down will occur after five seconds if a flame is not detected via the photo cell unit.

The burner flame is confined within a combustion chamber and heat exchanger of

sealed construction which prevents the combustion gases from escaping into the air cir-

culation system. The flame can be inspected through a small glass window  in the

warm air discharge compartment.

An insulated flue stack is extended to discharge the exhaust gases upwards approxi-

mately 2 m above ground.







Fig. 2

No.

Part



Flue stack



Heat exchanger



Inspection glass



Oil burner