3387
9
GB
3.7
ELECTRICAL WIRING
D7198
220/230V ~ 50/60Hz
C
O
NTROL BOX
MG569
Main switch
KEY TO LAY-OUT
B5
– 2nd stage working signal
C
– Capacitor
CN1
– Connector ionization probe
E
– Electrode
h1
– 1st stage hour counter
h2
– 2nd stage hour counter
M
– Motor
PA
– Air pressure switch
PG
– Min. gas pressure switch
RS
– Remote reset
SM
– Servomotor
SO
– Ionization probe
3.7.1 STANDARD ELECTRICAL WIRING
TO BE DONE BY
THE INSTALLER
CARRIED-OUT
IN THE FACTORY
ATTENTION:
Do not swap neutral and phase over, fol-
low the diagram shown carefully and
carry out a good earth connection.
The section of the conductors must be at
S3
– Remote lock-out signal
(230V - 0.5 A max.)
T6A
– Fuse
TB
– Burner earth
TL
– Limit thermostat
TR
– 2nd stage thermostat
TS
– Safety thermostat
V10
– Safety valve
V11
– 1st stage valve
V12
– 2nd stage valve
X..
– Plug
XP..
– Socket
least 1mm .
(Unless requested otherwise by local standards and legislation).
The electrical wiring carried out by the installer must be in compliance with the rules in force in the country
Connect the 2
nd
stage thermostat (TR) to terminals T6 - T8 and remove the bridge.
TESTING
Check the burner has stopped by opening the thermostats.
Check that the burner is blocked by opening the connector (
CN1
) inserted in the probe red wire and located
outside the control box.
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 halting the burner at least once
every 24 hours must be applied in series to limit thermostat (
TL
).
