Unigas RN510, Installation, Use & Maintenance Manual

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PART III: MAINTENANCE
34
Checking the detection current
To check the flame itensity signal, follow the diagram shown on the next picture. If the measured value is lower than the suggested one,
check the photoresistor position, the electrical contacts. Replace the photoresistor if necessary.
Cleaning and replacing the detection photoresistor
To clean/replace the photoresistive detector, remove it from its slot. To clean the photoresistor, use a clean cloth, not cleaning sprays.
Seasonal stop
To stop the burner in the seasonal stop, proceed as follows:
1
turn the burner main switch to 0 (Off position)
2 disconnect the power mains
3 close the fuel valve of the supply line
Burner disposal
In case of disposal, follow the instructions according to the laws in force in your country about the “Disposal of materials”.
WIRING DIAGRAMS
Refer to the attached wiring diagrams.
WARNING
1 - Electrical supply 230V 50Hz 1 a.c./400V 50Hz 3N a.c.
2 - Do not reverse phase with neutral
3 - Ensure burner is properly earthed
Fig. 27
Siemens LAL2.. control box
Minimum detection current @ 230V 8 µA
Maximum detection current without flame
0.8 µA
Maximum detection current
35 µA
34 35
SCALE µA DC
MA
Control box
Flame sen-
sor
Minimum detec-
tion signal
LMO44 QRB4 45 μ A
LAL2.. QRB1 95 μ A
34 35
+
MC TERMINAL BLOCK
-