20016967
8
GB
3.7
ELECTRICAL WIRING
Main switch
230V ~ 50Hz
D4626
ATTENTION:
³
Do not swap neutral and phase over, follow the diagram shown
carefully and carry out a good earth connection.
³
The section of the conductors must be at least 1mm².
(Unless requested
otherwise by local standards and legislation).
³
The electrical wiring carried out by the installer must be in compli-
ance with the rules in force in the country.
TESTING
³
Check the burner has stopped by opening the thermostats.
³
Check that the burner is blocked while is working by opening the connector
(
CN1
) inserted in the probe red wire and located outside the control box.
CONTROL BOX,
(see fig. 8)
To remove the control box from the burner it is necessary to:
³
disconnect all the connectors, the 7-pin plug, the high voltage cables and the
earth wire (
TB
);
³
unscrew the bolt (
A
, fig. 8) and pull the control box in the direction of the ar-
row.
To install the control box it is necessary to:
³
screw the bolt (
A
) in at a torque of 1 - 1.2 Nm;
³
reconnect all the connectors previously disconnected.
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 en-
sures 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
C
– Capacitor
CN1
– Ionisation probe connector
E
– Electrode
h1
– Hour counter
MV
– Motor
PA
– Min. air pressure switch
PG
– Min. gas pressure svitch
RS
– Remote reset
SO
– Ionisation probe
S3
– Lock-out signal (230V - 0.5A max.)
T6A
– Fuse
TB
– Burner-earth
TL
– Limit thermostat
TS
– Safety thermostat
V10
– Safety valve
V11
– Adjustment valve
X..
– Plug
XP..
– Socket
MG569
CONTROL BOX
TO BE DONE BY
THE INSTALLER
CARRIED-OUT
IN THE FACTORY
A
Fig. 8
E9250
