Riello 576T1 Installation, Use And Maintenance Instructions page 35

Verify that the burner stops by operating the boiler control thermostats 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 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 se-
ries to limit thermostat (TL).
3.4.1 STANDARD ELECTRICAL WIRING
Ionization probe
Electrode
ATTENTION
In the case of phase-
phase feed, a bridge
must be fitted on the
control box terminal
board between termi-
nal 6 and the earth ter-
minal.
Capacitor
KEY TO LAY-OUT
XP4 – 4 pole socket
XP6 – 6 pole socket
XP7 – 7 pole socket
X4 – 4 pin plug
X6 – 6 pin plug
X7 – 7 pin plug
st
B4 – 1 stage working signal
nd
B5 – 2 stage working signal
st
h1 – 1 stage hour counter
nd
h2 – 2 stage hour counter
PG – Min. gas pressure switch
S3 – Remote lock-out signal
(230V - 0.5 A max.)
T6A – Fuse
TL – Limit thermostat
nd
TR – 2 stage thermostat
TS – Safety thermostat
V10 – Safety valve
V11 – 1 st stage valve
nd
V12 – 2 stage valve
2744
Ignition
transformer
Air pressure
switch
Blue
White
Black
Motor
Connect 2
removing the bridge
Air damper actuator
Connector
Control box
RMG 88.620A2
D4147
~
230V 50Hz
nd
stage thermostat between clamps T6 and T8
5 GB
Burner earth