AERMEC HMG - Wiring; Power Cable and Grounding

47
ATTENTION
The use of copper conductors only is permitted.
ATTENTION
• Make sure the power supply has been cut off before
proceeding with electrical connections and wiring.
• Make sure that the wiring is carried out in compliance with
the laws and regulations in force and with this manual.
• The installation and electrical connections of the units and
their accessories must only be carried out by persons in
possession of the technical-professional requirements to
qualify for the installation, transformation, expansion and
maintenance of the systems and able to verify the same. for
the purposes of safety and functionality. In this manual they
will be generically referred to as "Personnel with specific
technical competence".
• Any damage caused by improper external wiring will be the
responsibility of the installer.
• Verify that the wiring is not subject to wear, corrosion,
excessive pressure, vibration, sharp edges or other negative
environmental effects. The control must also take into account
the effects of aging or continuous vibrations from sources
such as compressors or fans.
WIRING
How to wire power lines to the electrical box
• The cables of the power supply line, inside the unit, must be
grouped in protective conduits.
• The power supply cable must be protected, at the entrance
to the electrical box, by a rubber or plastic sheath to avoid
damage caused by the sharp edges of the sheet.
• Make sure that the electrical box and electrical wiring are
securely fixed to the unit to prevent damage caused by
loosening and dropping of components.
POWER CABLE AND GROUNDING
• The power cable supplied at the installation site of the unit
must be at least 1 mm.
• From the electrical box comes power (220 AC, 5A) to power
the water pumps, however, do not connect the pumps
directly in the electrical box but only via their AC contactor.
• The switching signals (220VAC, 2A) of the unit function and
unit error indicators are available in the electrical box.
• The remote switch control signal is available for the electrical
box, and please pay attention to the input passive dry contact.
• Leave some margin for electrical cables outside the unit
before bundling them with suitable cable ties.
• The communication cables between the control panel and the
main board must be connected to the earth line.
EARTHING
Make sure that the grounding cable is connected to the
building's ground connection system. Make sure that a
suitable differential switch is installed for earth leakage. Do
not connect the ground cable to gas or water pipes, to the
lightning rod or to the telephone ground cable.
ATTENTION
Gas piping: if there is an accidental leakage of electricity
from the unit, it could easily cause a fire or even an explosion.