A
CB wood screws diameter 4 + dowels
4.10 Electrical connections
4.10.1.
Control unit
The boiler is fully pre-wired. The mains supply is made via the cable
C
connected to the mains. All other external connections can be made
to the connection connectors (low voltage). The main characteristics
of the control unit are described in the table below.
Power supply voltage
230 VAC/50Hz
Rating of the main fuse F1 (230 VAC) 6.3 AT
Fuse rating F2 (230 VAC)
2 AT
Fan-DC
27 VDC
CAUTION
Keep to the polarity shown on the terminals: phase (L),
neutral (N) and earth
*
.
A
Routing of the 230 V cables
B
Routing of the sensor cables
C
Power supply cable
D
6,3 AT fuse
E
2 AT fuse
CAUTION
The following components of the appliance are at a
voltage of 230 V:
4
Boiler pump.
4
Combined venturi and gas valve unit.
4
Inverter valve.
4
The majority of components in the control panel and
the terminal box.
4
Power supply cable.
8800N003-B
C002336-E
C
A
B
E
D
MCA 15 - MCA 25 MCA 25/28 MI
4. Installation
29/04/2010 - 300022146-001-B
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