The firing rates were obtained in special
test boilers, according to EN 676 regula-
tions.
Fig. 4 indicates the diameter and length
of the test combustion chamber.
Example
Output 756 kW (650 Mcal/h):
diameter 60 cm,
length 2m.
The coupling is ensured when the boiler is
EC type-approved; for boilers or ovens
with combustion chambers of very differ-
ent dimensions compared to those shown
in the diagram of Fig. 4, preliminary
checks are recommended.
Fig. 4
Length of combustion
chamber - m
D715
Fig. 3
The maximum output is chosen within area A of the diagram.
The minimum output must not be lower than the minimum limit of the diagram.
Warning
The firing rate was obtained considering an ambient temperature of 20°C and an atmospheric pressure of 1013 mbar (approx. 0 m
above sea level), with the combustion head adjusted as shown in Ch. 4.6.
Pressure in combustion
chamber - mbar
D9755
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