Installation and operating instruction
Oil burner WL20/1-C Z
3 Product description
83307602 1/2019-04 La
10-84
3.3.2 Oil supply
Oil pump
The pump draws the oil through the supply line and carries it under pressure to the
oil nozzle. The pressure regulating valve keeps the oil pressure constant.
Solenoid valves
The solenoid valves open and close the oil supply.
For ignition, the combustion manager opens stage 1 solenoid valve. Stage 2 solen-
oid valve opens or closes depending on heat demand.
Sequence diagram
1
2
4
3
1
Oil pump on burner, with two solenoid valves fitted
2
Stage 1 solenoid valve (normally closed)
3
Nozzle head with nozzle
4
Stage 2 solenoid valve (normally open)