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3.4
ELECTRICAL WIRING
All the installation, maintenance and disassembly operations must be carried out with the electricity
supply disconnected.
WARNING
The burner requires periodic maintenance carried out by a qualified and authorised technician in con-
formity with legislation and local standards.
DANGER
ATTENTION:
Do not swap neutral and phase over, follow the diagram shown carefully and carry out a good earth
connection.
The section of the conductors must be at least 1 mm
legislation).
The electrical wiring carried out by the installer must be in compliance with the rules in force in the country.
Verify that the burner stops by operating the boiler control thermostats and that the burner locks out by sepa-
rating the red ionisation probe lead connector.
NOTES
The burners have been type-approved for intermittent operation. This means they must stop at least once every
24 hours in order to allow the electrical control box to check its efficiency on start-up.
The boiler limit thermostat (TL) normally ensures the burner halts. If this does not happen a time switch (IN)
halting the burner at least once every 24 hours must be applied in series to limit thermostat (TL).
STANDARD ELECTRICAL WIRING (see page 13).
3.4.1 ELECTRICAL WIRING WITH GAS LEAK CONTROL DEVICE (DUNGS VPS 504)
TO BE DONE BY
THE INSTALLER
KEY TO LAY-OUT
X6 - 6 pin plug
X7 - 7 pin plug
B4 - Working signal
h1 - Hour counter
PG - Minimum gas pressure switch
S3 - Remote lock-out signal
(230V - 0.5 A max.)
20033828
2
. (Unless requested otherwise by local standards and
D4199
T6A- Fuse
TL - Limit thermostat
TS - Safety thermostat
V10 - Safety valve
V11 - Adjustment valve
5
GB
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