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5.
Electrical connection
Boilers are delivered with electrical connections and electrical power
supply cable.
Electrical safety of the appliance is guaranteed only by correct grounding,
in compliance with the applicable laws and regulations.
Connect the boiler to a 230 V mono-phase + ground power supply by
means of three-pin cable supplied with it and make sure you connect
polarities L (live) and N (neutral) correctly.
Use a double-pole switch with a contact separation of at least 3mm in
both poles.
In case you replace the power supply cable, fi t a "HAR H05-VV-F"3x0.75
mm
cable with a diameter of 8 mm max.
2
5.1.
Access to the power supply terminal block
•
Isolate the electrical supply to the boiler by means of the double-pole
switch:
•
Remove the cover pulling it up;
•
Open the upper panel pulling on the upper corners of the boiler;
•
Unscrew the two screws securing the control board to the boiler;
•
Rotate the control board;
•
Unscrew the screws securing the control board to the boiler;
•
A 2A fast -blowing fuse is incorporated in the power supply terminal
block (fi g. 2).
(L) = LIVE WIRE brown
(N) = NEUTRAL WIRE blue
( ) = EARTH yellow-green
(1) (2) = Room thermostat contacts
Fusibile
Fusible
Figure 2: Main terminal block
5.2.
Pump connection
(FiN models only)
These models are sold without a circulation pump. If you want to oper-
ate the system pump directly from the boiler, the connection operations
are the following:
• Cut off power to the boiler with the two-pole switch.
• Open and remove the front door of the boiler and the cap.
• Pass the pump supply cable through the cable glands (use a har-
monized cable "HAR H05 VV-F" 3x0.75 mm
diameter of 8 mm). Access the wiring board as described in the
paragraph: "Electrical connection Accessing the supply terminal
block."
• Make the electrical connection following the diagram in the fi gure.
Figure 2a: pump connection
16
with a maximum
2
post circulation
3 min
post circulation
4h
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