andrews R18 Series, Technical Documentation Manual

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18IP22B
8
Fig. 9 Burner
Fig. 10 Combustion air damper
Burner
The burner is mounted under the combustion chamber in the
chassis. The burner bars, mounted in the burner trolley are
manufactured from stainless steel. Each burner bar is supplied
by its own injector nozzle mounted on the gas manifold.
Combustion air damper
A combustion air damper is situated underneath the burners.
Gas train
The principal components of the gas train are a main governor
and two main gas valves or combined main governor and main
gas valve. The quantity of gas is adjusted in proportion of the
quantity of air being supplied by the air damper opening. The
pilot flame has a separate pilot line with pilot governor and gas
valve.