5
FIRING RATES (A)
During operation, burner output varies between:
• MAXIMUM OUTPUT
, selected within area A,
•
and
MINIMUM OUTPUT
, which must not be lower than
the minimum limit in the diagram.
RS 190 /M = 1781 MBTU/h = 522 kW
Important:
The FIRING RATE value range has been obtained con-
sidering an ambient temperature of 68 °F (20 °C), and
an atmospheric pressure of 394” WC and with the com-
bustion head adjusted as shown on page 8.
Note:
The FIRING RATE areas given in figure (A) have been
reduced by 10% with respect to the maximum range that
can be reached.
Consult Appendix on page 18 for operation at different
surrounding temperatures and/or altitudes.
MINIMUM FURNACE DIMENSIONS (B)
The firing rates were set in relation to certified test boil-
ers.
Figure (B) indicates the diameter and length of the test
combustion chamber.
Example:
Output 6400 MBtu/hr:
diameter = 31.5 inch; length 10.4 ft
(A)
RS 190/M
D2431
Combustion chamber pressure
“WC
(B)
D2920
Diameter (inches)
Length (ft)
Furnace dimensions
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