3367
6
GB
3.5
ELECTRICAL WIRING
A
E9275
TO BE DONE BY
THE INSTALLER
CA
RR
IE
D-
OU
T
IN
T
H
E F
A
C
T
O
R
Y
CONTR
O
L BOX
MO550
D4685
Main switch
230V ~ 50Hz
³
Do not swap neutral and phase
over, follow the diagram shown
carefully and carry out a good
earth connection.
³
The cross section of the wires
must be at least 1 sq. mm.
(Un-
less requested otherwise by local
standards and legislation).
³
The electrical wiring carried out
by the installer must comply with
the rules in force in the country.
*
(See “Hydraulic systems” on
page 5).
If any of the hydraulic sys-
tems feature the automatic shutoff
device (230V - max. 0.5A), it must
be connected to terminals
N - T2
in
the 7-pin plug.
WARNING:
CONTROL BOX
(see fig.11)
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)
and pull the control box in the direction of the arrow.
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.
NOTE:
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 se-
ries to limit thermostat
(TL)
.
KEY TO LAYOUT:
B5
– 2nd stage working si-
gnal
(230V
~
- 0.1A max.)
C
– Capacitor
E
– Electrode
F
– Flame detector
h..
– Hours counter
(230V
~
- 0.1A max.)
MV
– Motor
P
– Bridge socket
RS
– Remote reset
S3
– Remote lockout signal
(230V
~
- 0.5A max.)
SER
– Safety lockout device
T6A
– Fuse
TB
– Burner earth
TL
– Limit thermostat
TR
– Adjustment thermostat
TS
– Safety thermostat
V1
– Oil valve 1
st
stage
V2
– Oil valve 2
nd
stage
X..
– Plug
XP..
– Socket
Fig. 11
TESTING
³
Check the burner has stopped by opening
the thermostats.
³
Check the burner's lockout during opera-
tion by interrupting the flame detector.
