Unigas RX63, Manual Of Installation - Use - Maintenance

Page: 38 / 127

PART IV: MAINTENANCE
38
Electrodes Adjustment
Important Note: Check the ignition and detection electrodes after removing/adjusting the combustion head.
Adjust the electrodes position according to the electrodes type installed on the burner. Follow the quotes shown on the next picture.
Checking the detection current (natural gas)
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.
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”.
ATTENTION: avoid the ignition and detection electrodes to contact metallic parts (blast tube, head, etc.), other-
wise the boiler’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
Ionization probe 4 µA (values on display: 30%)
the gap between ignition electrode E and grounded electrode M must be 3 ÷ 4 mm . Ignition electrod must be positioned over
the G hole.
E
M
G
E
3÷4
ER
E
M
G
Protective earth PE
Ionization probe (ION)
QRB.../ QRC... signal voltage
QRB... GND
1
2
3
4
5
L
X10-05