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Heating cables are part of the standard supply of outdoor-installation no-gylcol units, to protect: pump volutes, mixing
manifolds, pipes inside the machine. WARNING: it is the installer's responsibility to protect the sections of machine infeed
and outfeed pipes that lead to the chilled beam circuit and chiller, including the inertial tank.
3.5 ELECTRICAL CONNECTIONS
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The electrical connections must comply with the information provided in the wiring diagram attached to the unit, and
the regulations in force in the place of installation.
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The ground connection is required by law. The installer must connect the earth cable using the relevant PE clamp
on the earth bar located in the electric control board.
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Check that the power supply voltage corresponds to the rated data of the unit (voltage, number of phases,
frequency) specified on the plate on the machine.
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The power supply voltage must not vary more than ±5% and the imbalance between phases must always be less
than 2%. If this does not happen, contact our technical department in order to select the relevant protections.
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Check that the line is connected with the correct sequence of phases.
The power cables should be connected to the unit through a hole provided on the upper part of the electric control board
(comply with the directions given in the dimensional diagram).
The control circuit power supply is derived from the power line via a transformer located in the electric control board. The
control circuit is protected by specific automatic switches.
The unit is equipped with devices (condensers) on the inverters that remain powered even after the electric power supply
has been disconnected from the unit. It is necessary to wait until they are discharged to prevent electric shocks.
3.6 CHECKS
AQUA Link is not equipped with a completely independent control but is provided with a control module (IQ-nomic)
controlled by a signal from the module (IQ-nomic) connected to the Gold and from the (All Year Comfort) module that
manages the secondary distribution circuit to the chilled beams.
Equip the section of connection piping between the plate heat exchanger and the secondary circuit
with protections against low temperatures.
Before performing any maintenance, disconnect the power supply and control circuitry with a
specific isolating switch, then wait at least 5 minutes before removing the wires.
Make sure that the motors of the pumps have completely stopped: motors in free rotation can result
in hazardous voltages for the inverter terminals even when not powered.
The section of the cable and the line protections must comply with that specified in the wiring
diagram and the relevant table attached to the unit.
T
he electric power supply must take place within the above mentioned values: otherwise, the
warranty is immediately rendered null and void.
To attach the power cord: Use user cable fastening systems that resist to traction and torsion.
Make sure there is no voltage before performing any operation on electric parts.
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