Unigas K990A, Installation Manual

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PART IV: MAINTENANCE
39
Checking the detection current with electrode (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.
Burner service term
- In optimal operating conditions, and with preventive maintenance, the burner can last up to 20 years.
- Upon expiry of the burner service term, it is necessary to carry out a technical diagnosis and, if necessary, an overall repair.
- The burner status is considered to be at its limit if it is technically impossible to continue using it due to non-compliance with safety
requirements or a decrease in performance.
- The owner makes the decision whether to finish using the burner, or replacing and disposing of it based on the actual state of the
appliance and any repair costs.
- The use of the burner for other purposes after the expiry of the terms of use is strictly prohibited.
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 / 400V 50Hz 3N a.c.
2 - Do not reverse phase with neutral
3 - Ensure burner is properly earthed
Device
Flame detector Minimum detection signal
Siemens LMV2x/3x
Ionization probe 3 µA (values on display: 30%)
Protective earth PE
Ionization probe (ION)
QRB.../ QRC... signal voltage
QRB... GND
1
2
3
4
5
L
X10-05