Firing Rates; Test Boiler - Riello RL 70 Manuel D'entretien

(A)
(B)
FIRING RATES (A)
The RL 70 - 100 - 130 Model burners can work in
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two ways: one-stage and two-stage.
1st stage DELIVERY must be selected within
area A of the adjacent diagrams.
2nd stage DELIVERY must be selected within
area B (and C for model RL 130). This area pro-
vides the maximum delivery of the burner in rela-
tion 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 area B. In order
to utilize also area C (RL 130) it is necessary to
perform the calibration of the combustion head
as explained on page 5.
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
6.
TEST BOILER (B)
The firing rates were 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 65 kg/hour:
diameter = 60 cm; length = 2 m.
Whenever the burner is operated in a much
smaller
chamber, a preliminary test should be per-
formed.
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commercially-available combustion