12. making the electrical connections
Electrical safety of the appliance is only guaranteed by correct grounding, in accordance with the rules in for-
ce.
Connect the boiler to a 230V monophase + ground power supply by means of the three-pin cable supplied with
it and make sure you connect polarities 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 fit a HAR H05 VV-F' 3x0.75mm
cable with an 8mm diameter
2
max.
IMPORTANT: Check that the overall current drawn by accessories connected to the appliance is less
than 2 A. If the value is greater, a relay must be wired between the boiler control circuit board and the
accessories drawing the higher current.
Cover
Terminal Block
Terminal Block
Cover
Facia panel
Terminal Block
Figure 8
12.1 terminal blocks access
• Cut off power to the boiler with the two-pole switch.
• Remove the top facia panel cover (which is held by magnets).
• Unscrew the two screws holding the facia panel in place.
• Swing the facia panel forwards.
Main terminal block M1
• Remove the clip-on cover from terminal strip M1.
• The main terminal block incorporates a fast blow 3.15 A fuse (figure 8). Remove the black fuse holder to
check and/or replace the fuse.
Terminal block M2
• Unscrew the fixing screw and remove the cover from terminal block M2.
Terminal block M3
• Unscrew the fixing screws and remove the main cover.
IstructIons pErtaInIng to thE InstallEr
912.403.1 - IE
52