Riello ER Series Installation, Use And Maintenance Instructions page 37

4
CHAPTER Burner supply
4.2 Gas supply connections to the burner
Burner connection
The connection of the burner to the gas train is made through a positionable (horizontal/vertical) flange attachment on the gas
butterfly valve.
Paragraph 2.4
The size of the flange is given in .
Use the relative adapters to connect the gas flange to the train, supplied as accessories.
Pilot burner connection
The burner has a special gas train that is fixed to the side of the air box. It should be connected to the main train downstream from
the filter or pressure regulator (depending on the configuration).
The diagrams below show the natural gas version.
Pilot train configuration
for gas burners
D3772
Supply pressure 50 - 500 mbar
Fig. 12
11