6.2
Electrical wiring factory-set
Key (Fig. 19)
MB
Wiring terminal block
MV
Fan motor
F1
Protection against radio interference
PO
Oil pressure switch
TA
Ignition transformer
SM
Servomotor
FR
Photocell
VF
Solenoid valve on supply line
CN
Connector
VS
Safety solenoid valve
VR
Solenoid valve on return line
VR1
Solenoid valve on return line
TB
Burner ground (earth) connection
Electrical system
GB
23
D2703
Fig. 19
20036074