Firing Rates; Test Boiler - Riello RL 28/1 Installation, Use And Maintenance Manual

(A)
(B)
FIRING RATES (A)
The burner delivery must be selected within area
of the adjacent diagram.
This area is called firing rate and provides the
delivery of the burner in relation to the pressure
in the combustion chamber.
The work point may be found by plotting a verti-
cal line from the desired delivery and a horizontal
line from the pressure in the combustion cham-
ber. The intersection of these two lines is the
work point which must lie within firing rate.
Important
The FIRING RATE area values have been ob-
tained considering a surrounding temperature of
20 °C, and an atmospheric pressure of 1000
mbar (approx. 100 m above sea level) and with
the combustion head adjusted as shown on page
D585
6.
TEST BOILER (B)
The firing rate was set in relation to special test
boilers in accordance with the methods defined
in EN 267 standards.
Figure (B) indicates the diameter and length of
the test combustion chamber.
Example:
delivery 25 kg/hour:
diameter = 50 cm; length = 1,25 m.
Whenever the burner is operated in a much
smaller
chamber, a preliminary test should be per-
formed.
D586
4
commercially-available combustion