Riello RS 64/M MZ Installation, Use And Maintenance Instructions page 24

Example with G 20 natural gas:
Maximum output operation
Gas pressure at test point 1)(Fig. 24)
Pressure in combustion chamber
9.4 - 2.0
A pressure of 7.4 mbar, column 1, corresponds in the table Tab.
J to an output of 700 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. 24),
set the maximum modulating output required from the burner
operation:
– find the nearest output value in Tab. J for the burner in
question.
– Read, on the right (column 1), the pressure at the test point
1)(Fig. 24).
– Add this value to the estimated pressure in combustion
chamber.
Example with G 20 natural gas:
Operating at the desired maximum output: 700 kW
Gas pressure at an output of 700 kW
Pressure in combustion chamber
7.4 + 2.0
pressure required at test point 1)(Fig. 24).
20169372
Installation
= 9.4 mbar
= 2.0 mbar
= 7.4 mbar
= 7.4 mbar
= 2.0 mbar
= 9.4 mbar
22 GB
S8738
1
2
Fig. 24