Unigas HR92A, Manual Of Installation - Use - Maintenance

Page: 51 / 140

PART IV: MAINTENANCE
51
Ignition pilot electrode positions
(Dptional)
Checking the detection current
To check the detection signal follow the scheme in the picture below. If the signal is less than the value indicated, check the position of
the detection electrode or detector, the electrical contacts and, if necessary, replace the electrode or the detector.
Flame detection probe
To clean/replace the detection photocell, proceed as follows:
1
Disconnect the system from the electrical power supply.
2 Shut off the fuel supply;
3 remove the photocell from its slot (see next figure);
4 clean the bulbe if dirty, taking care not to touch it with bare hands;
5 if necessary, replace the bulb;
replace the photocell into its slot.
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
ATTENTION: avoid contact between electrodes and metallic parts (blast tube, head, etc.), otherwise the burner’s operation
would be compromised. Check the electrodes position after any intervention on the combustion head.
Device
Flame detector Minimum detection signal
Siemens LMV2x/3x
QRA 70 µA (intensity of flame >24%)
QRA... (-)
QRA... (+)
1
2
X10-06
+