Operation - Unigas RG91 Manual

PART III: OPERATION

OPERATION

ATTENTION: before starting the burner up, be sure that the manual cutoff valves are open. Be sure that the mains
switch is closed.
Light oil operation
The fan motor starts and the pre-purge phase as well. Since the pre-purge phase must be carried out at the maximum air rate, the

control box drives the actuator opening and when the maximum opening position is reached, the pre-purge time counting starts.
At the end of the pre-purge time, the actuator is in the light oil ignition position: the ignition transformer is energised (lamp B4 on);

the ignitor gas valves (if provided) and the light oil valves open. Few seconds after the valves opening, the transformer is de-ener-
gised and lamp B4 turns off.
The burner is now operating, meanwhile the actuator goes to the high flame position; after some seconds, the two-stage operation

begins; the burner is driven automatically to high flame or low flame, according to the plant requirements.Operation in high or low
flame is signalled by LED B2 on the burner control panel.
Keys
B1 Lock-out LED
B2 Hi-flame operation LED
B3 Lo-flame operation LED
B4 Ignition transformer operation LED
B5 Fan motor overload tripped LED
S1 Main switch
S7 CMF switch (0=stop, 1=high flame,2=low flame, 3=automatic) - fully modulating burners only
N1 Pre-heating oil tank
N2 Pre-heating resistors safety thermostat
N3 Oil solenoid valve operation
O1 EVG1 solenoid valve operation LED
O4 Oil pump in operation LED
A1 Burner Modulator (only on fully modulating burners)
A2 AZL..
B2 B3 B4
B5
D O1
O4
S7
B1
A1
A2
RWF50.X
S1
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