42VMC
GB - 9
E N G L I S H
Electrical connections
Jumper positioning:
Units are equipped with a jumper inside the electric control box, to
make them suitable for the two installation typologies:
Wall vertical installation: jumper inserted.
Ceiling horizontal installation: jumper removed.
To reset incorrect jumper positioning, proceed as follows:
• Disconnect the power supply.
• Reposition the jumper correctly.
• Connect the power supply.
IMPORTANT:
• Make refrigerant connections before electrical
connections.
When disconnecting, disconnect electrical connections before
refrigerant connections.
• Make ground connection prior to any other electrical
connections.
The mains supply must be connected as follows:
Models 42VMC 009, 012, 014: to the indoor unit.
Models 42VMC 018, 024: to the outdoor unit.
• Make electrical connections between units prior to proceeding
to mains supply unit connection.
• Before proceeding with the unit connection to the mains supply
locate live L and neutral N, then make connections as shown
in the wiring diagram.
• Ensure that mains supply connection is made through a switch
that disconnects all poles, with contact gap of a least 3 mm.
• The indoor - outdoor unit connecting wires must be A07 RN-F type
(or higher), with synthetic rubber insulation with Neoprene coating,
according to EN 60335-2-40 and HD277.S1 codes.
• The mains supply connecting cable for 42VMC 009, 012, 014
units, must be H07 RN-F type (or higher), with synthetic rubber
insulation with Neoprene coating, according to EN 60335-2-40
and HD277.S1 codes.
• Ground connection between indoor and outdoor unit is made
via the refrigerant pipes.
• With the cable clamp supplied, secure the connecting cable
between the two units.
• Fasten the electric connecting wires with refrigerant tubes together.
Allow an additional length to the electric wires for easy connection
to the unit connectors.
Notes:
• For sizing of power supply wires and delay type fuses, refer
to the outdoor unit installation instructions.
• All field electrical connections are the responsibility of the
installer.
IMPORTANT:
The units are provided with electronic control.
A time-delay device provides a 3 minute starting delay of the
compressor every time the unit is stopped or when it is initially
switched on.
Control and safety devices
The following control and safety devices are built into the indoor
units (see wiring diagrams):
• Room air thermostat adjustable from 18°C to 32°C.
• Motor with overheat/overcurrent protection.
