Riello DB 6 LSM C13 Installation, Use And Maintenance Instructions page 70

4.15.2 Wiring diagram (SQM 10)
D9812
Key (Fig. 30)
MB Burner terminal strip
PA Air pressure switch
PGM Maximum gas pressure switch
PO Minimum oil pressure switch
SM Servomotor
TA Ignition transformer
TB Burner earth
20114504
Installation
UV UV sensor
UV1 UV sensor for continuous service (version FS2)
VF Working valve
VR Oil return valve
VRS Oil return valve
VS Oil safety valve
VP1-2 Pilot gas safety valve
After carrying out maintenance, cleaning or
checking operations, refit the cover and all the
safety and protection devices of the burner.
27 GB
Fig. 30