Nimbus Compact M NET R32 Installation Manual UK

Electrical connections
5. Electrical connections
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Carry out the electrical connections after having
completed all the hydraulic connections.
After the outdoor unit is switched off, it is necessary
to wait at least 5 minutes to switch it on
again.
The indoor and outdoor units must be powered separately by
observing the indications of the table.
Moreover, a ATG BUS-type connection must be made between
the indoor and outdoor units.
This connection can be made using a cable with reduced
cross-sectional size (0.75 mm 2 recommended cross-sectional
size).
Electrical circuit
– The electrical system must satisfy all the requirements
of the law in force.
– Check that the mains power supply voltage and frequency
are in line with the data indicated on the system’s
data plate (see table).
– For greater safety, ask a qualified technician to perform
a thorough check of the electrical system.
– We recommend verifying the presence of surge protection
devices (SPDs) on the power supply line, in order to
comply with the IEC 60364 standard and the national
standards in force, and the presence of safety switches
and residual-current circuit breakers in the electrical
panels that power the indoor and outdoor units separately.
– For the machine’s power supply we recommend using
properly sized disconnection devices in compliance
with the applicable regulations.
– The power supply connection is a type-Y system and
the connection cable should only be replaced by a
qualified technical support centre, in order to avoid any
damages.
– Check that the electrical installation is adequate for supporting
the power consumption of the installed units,
as indicated on the appliances’ data plate.
– The electrical connections must be made with the help
of a fixed support (do not use portable socket-outlets)
and fitted with a double pole switch, with a contact gap
of at least 3 mm.
– The system must be connected to an electrical system
with an earthing device capable of ensuring the safety
of the installation.
– It is forbidden to use hydraulic connection pipes and
pipes of the space heating system to earth the system.
– The manufacturer is not liable for any damage caused
by a system with inadequate earthing or electrical system
anomalies.
– Connect the power supply cable to a 230 V- 50 Hz (1
ph) or 400 V - 50 Hz (3 ph) network, while verifying
that the pole markings match and the connections to
earth (see table).
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