Electrical Connections - Ferroli MACH Instrucciones De Uso

MACH

2.5 Electrical connections

Connection to the power supply
Electrical safety of the unit is obtained only when it is correctly connected to an
B
effective grounding system as required by current safety standards. Have the effi-
ciency and suitability of the grounding system checked by professionally qualified
personnel; the Manufacturer declines any liability for damage caused by failure to
ground the system. Also make sure the electrical system is adequate for the maxi-
mum power absorbed by the unit, as specified on the boiler data plate.
The boiler is pre-wired and equipped with a "Y" type connection cable to the electric line without plug. The connections
to the mains must be made with a fixed connection and equipped with a double-pole switch with contact opening gap
of at least 3 mm, interposing 16 A fuses max. between boiler and line. It is important to respect the polarity (LINE: brown
wire / NEUTRAL: blue wire / GROUND: yellow-green wire) in the connections to the power line. When installing or re-
placing the power cable, the ground wire must be left 2 cm longer than the others.
The unit's power cable must not be replaced by the user. If the cable gets dama-
B
ged, turn the unit off and have the cable replaced only by professionally qualified
personnel. In case of power supply cable replacement, use only cable "HAR
H05VV-F" 3 x 1.5 mm
Room thermostat (optional)
CAUTION: The room thermostat must have clean contacts. CONNECTING 230 V.
B
TO THE TERMINALS OF THE ROOM THERMOSTAT WILL IRREPARABLY DA-
MAGE THE ELECTRONIC CARD.
When connecting a remote timer control or a timer switch, do not take the power
supply for these devices from their cut-out contacts. Their power supply must be
taken with a direct connection from the mains or with batteries, depending on the
kind of device.
External probe (optional)
Connect the probe to its respective terminals. The maximum permissible length of the boiler – external probe connection
electric cable is 50 m. A common 2-core cable can be used. The external probe should preferably be installed on the
North, North-West wall or on the wall with most of the main living room. The probe must never be exposed to the sun
in the early morning, and in general, as far as possible, it must not receive direct solar radiation; if necessary, it must
be protected. In any case, the probe must never be mounted near windows, doors, ventilation openings, flues or heat
sources that could affect the reading.
EN
2
with a maximum external diameter of 8 mm.
fig. 53- Positioning of external probe not recommended
cod. 3541V120 - Rev 00 - 09/2021
323