Riello 46662X Installation, Use And Maintenance Instructions page 33

4
Fuel supply
4.1 General gas supply layout (example)
D7543
Key
C Anti-vibration joint
GF Gas filter
HPG High gas pressure regulator
LPG Low gas pressure regulator
MM Pressure gauge
PA Minimum air pressure switch
PGM Maximum gas pressure switch
PGm Minimum gas pressure switch
RG Gas butterfly valve
SRV Pressure limiting valve with outlet into the environment
VE Fan
VPS Leak detection control device
VR Gas pressure regulator solenoid valve
VS Gas safety solenoid valve
max. 500 mbar
0.5 ÷ 4 bar
Fig. 12
11