Riello RS 310/EV O2 ULX Installation, Use And Maintenance Instructions page 28

To calculate the required gas pressure at test point P1)(Fig. 22),
set the MAX output required from the burner operation:
– find the nearest output value.
– Read the pressure at the test point P1)(Fig. 21).
– Add this value to the estimated pressure in the combustion
chamber.
Example for RS 510/EV O2 ULX with G20 natural gas:
Required burner maximum output operation: 3000 kW
Gas pressure at an output of 3000 kW
Pressure in combustion chamber
Pressure required at test point P1)(Fig. 21).
The output and gas pressure data refer to op-
eration with gas butterfly valve fully open (90°)
on the whole firing rate.
WARNING
20205511
Installation
= 90 mbar
= 10 mbar
90 + 10 = 100 mbar
26 GB
P1
20198299
P4
Fig. 22