2737
5
GB
3.4
ELECTRICAL WIRING
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 1mm².
(Unless requested
otherwise by local standards and legislation).
The electrical wiring carried out by the installer must be in compli-
ance with the rules in force in the country.
Verify that the burner stops by operating the boiler control thermo-
stats and that the burner locks out by separating 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 ther-
mostat (
TL
) normally ensures the burner halts. If this does not happen a
time switch halting the burner at least once every 24 hours must be applied
in series to limit thermostat (
TL
).
KEY TO LAY-OUT
PG
– Minimum gas pressure switch
S3
– Remote lock-out signal
(230V - 0.5 A max.)
T6A
– Fuse
TL
– Limit thermostat
TS
– Safety thermostat
V10
– Safety valve
V11
– Adjustment valve
Ionization probe
Ignition transformer
Electrode
Motor
Ca
pa
ci
to
r
Burner
230V
~
50Hz
Terminal board
Suppressor
Air pressure switch
Blue
White
Black
VERSION
FOR GAS LEAK CONTROL DEVICE
(DUNGS VPS 504)
Control box
RMG 88.620A2
D4258
Connector
earth
In the case of phase-phase feed,
a bridge must be fitted on the
control box terminal board be-
tween terminal 6 and the earth
terminal.
ATTENTION
TO BE DONE BY
THE INSTALLER
CARRIED-OUT
IN THE FACTORY
