Riello RLS 28 Installation, Use And Maintenance Instructions page 28

Example RLS 28 with natural gas G20:
2nd stage operation
Gas pressure at test point 1) (Fig. 29)
Pressure in combustion chamber
A pressure of 7.3 mbar, column 1, corresponds in the table Tab.
K to an output of 210 kW.
This value serves as a rough guide; the effective output must be
measured at the gas meter.
To calculate the required gas pressure at test point 1)(Fig. 29),
with the output fixed at that required for the burner in the 2nd
stage:
– find the nearest output value in the table Tab. K for the burner
in question.
– Read, on the right (column 1), the pressure at the test point
1)(Fig. 29).
– Add this value to the estimated pressure in combustion
chamber.
Example RLS 28 with natural gas G20:
Desired output in 2nd stage: 210 kW
Gas pressure at an output of 210 kW
Pressure in combustion chamber
pressure required at test point 1)(Fig. 29).
20165123
= 9.3 mbar
= 2 mbar
9.3 - 2 = 7.3 mbar
= 7.3 mbar
= 2 mbar
7.3 + 2 = 9.2 mbar
Installation
+
26 GB
S9689
Fig. 29