Firing Rates; Minimum Furnace Dimensions - Riello RLS 70 Installation Instruction

3.8

Firing rates

MAXIMUM OUTPUT must be selected in area A.
In order to increase to area B (RLS 130) it is necessary to perform
the calibration of the combustion head as explained on page 12.
MINIMUM OUTPUT must not be lower than the minimum limit
shown in the diagram:
RLS 70 = 854 MBtu/hr
RLS 100 = 1330 MBtu/hr
RLS 130 = 1750 MBtu/hr
The FIRING RATE area values have been obtained
considering an ambient temperature of 68 °F, and
an atmospheric pressure of 394" WC and with the
combustion head adjusted as shown on page 14.
WARNING
NOTE:
The firing rates areas given in (Fig. 5) have been reduced by 10%
with respect to the maximum range that can be reached.
Consult Procedure on page 10 to refer burner operating condition
in high altitude plants.
3.8.1

Minimum furnace dimensions

The firing rates were set in relation to certified test boilers.
Figure (Fig. 4) indicates the diameter and length of the test com-
bustion chamber.
Example
Output 2579 MBtu/hr:
diameter 24 inch - length 6.6 ft.
Diameter (inches)
D2919
Technical description of the burner
= 6.1 GPH
= 9.5 GPH
= 12.5 GPH
Fig. 4
9
RLS 70
RLS 100
RLS 130
A
A
A
B
Fig. 5
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