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INSTRUCTIONS PERTAINING TO THE INSTALLER
15. CONNECTING THE MAINS SUPPLY
CAUTION: If the appliance is directly connected to a underfloor system, the fitter must install a safety thermostat
to prevent it from overheating.
Electrical safety of the appliance is only guaranteed by correct grounding, in compliance with the applicable laws and
regulations.
Connect the boiler to a 230V mon 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
2
cable with an 8mm diameter max.
…Access to the power supply terminal block
• isolate the electrical supply to the boiler by the double-pole switch;
• unscrew the two screws securing the control board to the boiler;
• rotate the control board;
• unscrew the lid and gain access to the wiring (Figure 7).
The 2A fast-blowing fuses are in cor po rated in the
power supply terminal block (to check or replace
the fuse, pull out the black fuse carrier).
IMPORTANT:
be sure to connect polarities cor-
rectly
L
(LIVE) -
N
(NEUTRAL).
(L) =
Live
(brown)
(N) =
Neutral
(blue)
=
Ground
(yellow/green)
(1) (2) =
Room thermostat terminal
Figure 7
CG_1770 / 0904_0707
