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4.9
Test boiler
The firing rates were set in relation to special test boilers, accord-
ing to EN 676 regulations.
Fig. 4 indicates the diameter and length of the test combustion
chamber.
Example:
output 650 Mcal/h: diameter 60 cm - length 2 m.
4.9.1
Commercial boilers
The burners are suitable for operation on either flame-inversion
boilers* or boilers with combustion chambers featuring flow from
the base (three flue passes) on which the best results are ob-
tained in terms of low NOx emissions.
The maximum thickness of the boiler's front door must not ex-
ceed 250 mm (Fig. 5).
The burner-boiler match is assured where the boiler is EC type-
approved; for boilers and furnaces with combustion chambers
featuring dimensions differing considerably from those given in
the diagram (Fig. 4), it is advisable to perform preliminary tests.
(*) For flame inversion boilers, a kit is available to reduce CO
emissions if required.
20035573
Technical description of the burner
12
GB
250 mm MAX
D1079
D715
Fig. 4
Fig. 5
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