Riello DB 3 LSM C13 Installation, Use And Maintenance Instructions page 60

All the installation, maintenance and disassembly operations must be carried out with the electricity supply
disconnected.
Wiring diagram (SQM 40)
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ASZ Servomotor potentiometer (optional)
XT1 Burner terminal strip
PA Air pressure switch
PGM Max. gas pressure switch
PO Maximum oil pressure switch
SM Servomotor
TA Ignition transformer
XTB Burner earth
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UV UV sensor
VF Operation valve
VR Oil return valve
VRS Oil return valve
VS Oil safety valve
X1-X2-X3 Servomotor terminal board
XS1-XP1 Servomotor connection plug-socket
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Wiring diagrams
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