MCAC-TSM-2008-02 Electrical Connection
Installation 71
5. Electrical Connection
The MGC chillers leave the factory already wired, and require the installation of an omnipolar thermal
overload switch, a lockable mains disconnecting switch for the connection to the mains power supply, and
the connection of the flow switch to the corresponding terminals. All the above operations must be carried
out by qualified personnel in compliance with the legislation in force.
For all electrical work, refer to the electrical wiring diagrams in this manual. You are also recommended to
check that the characteristics of the mains electricity supply are adequate for the absorptions indicated in the
electrical characteristics table below, also bearing in mind the possible use of other equipment at the same
time.
Important
Power to the unit must be turned on only after installation work (hydraulic and electrical) has been
completed.
All electrical connections must be carried out by qualified personnel in accordance with legislation
in force in the country concerned.
Respect instructions for connecting phase, neutral and earth conductors.
The power line should be fitted upstream with a suitable device to protect against short-circuits and
leakage to earth, isolating the installation from other equipment.
Voltage must be within a tolerance of ±10% of the rated power supply voltage for the unit (for three
phase units, the unbalance between the phases must not exceed 3%).If these parameters are not
respected, contact the electricity supply company.
For electrical connections, use double insulation cable in conformity with current legislation in the
country concerned
An omnipolar thermal overload switch and a lockable mains disconnecting switch, in compliance
with the CEI-EN standards (contact opening of at least 3mm), with adequate switching and residual
current protection capacity based on the electrical data table shown below, must be installed as
near as possible to the appliance
The devices on the unit must be lockable. An efficient earth connection is obligatory. Failure to
earth the appliance absolves the manufacturer of all liability for damage.
In the case of three phase units, ensure the phases are connected correctly.
Do not use water pipes to earth the unit.
Electrical Panel
The electrical panel is located inside the unit at the top of the technical compartment where the various
components of the refrigerant circuit are also to be found.
To access the electrical panel, remove the front panel of the unit by undoing the screws.
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