Reduction Of Unit's Noise Level; Electrical Connections - Hitecsa ADVANCE EWMIM 120 Mode D'emploi

II.5.3

REDUCTION OF UNIT'S NOISE LEVEL

Correct installation envisions taking measures aimed at reducing the
noise inconvenience from the unit's standard operation.
IMPORTANT!
Incorrect positioning or installation of the unit may
amplify noise levels and vibrations generated
during operation.
The following accessories are available to reduce noise and vibration:
KSA - Anti-vibration mountings.
When installing the unit, bear the following in mind:
 If, after installation and start-up of the unit, structural vibrations are
observed in the building which provoke such strong resonance that
noise is generated in other parts of the building, refer to a qualified
acoustic technician for a complete analysis of the problem.
II.6

ELECTRICAL CONNECTIONS

DANGER!
Always install a general circuit breaker in a
protected area close to the machine (this switch
must have a delayed characteristic curve, suitable
flow rate and interruption power and be equipped
with protection devices against short-circuits and
earth leakage in order to disconnect the system
from other utilities) and with 3 mm minimum
contact opening distance. Earth connection is
compulsory by law to ensure user safety while the
machine is in use.
DANGER!
The electrical connection of the unit must be
carried out by qualified personnel, in compliance
with the regulations applicable in the country where
the unit is installed. Non-conforming electrical
connections releases HITECSA from liability
concerning damage to objects and persons. In
making the electrical connections to the board,
cables must be routed so that they do not touch the
hot parts of the machine (compressor, flow pipe
and liquid line). Protect the wires from any burrs.
DANGER!
Check the tightness of the screws that secure the
conductors to the electrical components on the
board (vibrations during handling and transport
could have caused them to come loose).
IMPORTANT!
For the electrical connections of the unit and
accessories, refer to the relative wiring diagram.
Check the value of the mains voltage and frequency that must fall within
the 400 V ± 10% (360-440V) limit for the voltage and 50 Hz ± 1% for the
frequency. Check the phase unbalance: it must be less than 2%.
IOM_EWMIM-EWMIMH_120a262_207984_200601_ES-EN-FR-DE-IT
Example:
L1-L2 = 388V, L2-L3 = 379V, L3-L1 = 377V
Average of values measured = (388+379+377) / 3 = 381V
Maximum deviation from the average = 388-381 = 7V
Unbalance = (7 / 381) x 100 = 1.83 % (acceptable as it is within the
envisaged limit).
The safety door interlock automatically prevents electric power being
fed to the unit if the cover panel over the electrical panel is opened.
After opening the front panel of the unit, feed the power supply cables
through the cable clamps in the external panelling and then through the
ducts at the base of the electric board.
The electrical power supplied by the three-phase line, must be taken to
The indicated supply sections (cable type FG16) are approximate. The
installer is responsible to suitably size the electrical supply line switch -
including the earth cable - according to: line length, distribution system,
type of cable, type of layout, maximum absorption of the unit
The earth conductor must be longer than the other conductors in order
to ensure that if the cable fastening device should become loose, it will
be the last to be stretched.
II.6.1.1 Remote management through connections
prepared by the installer
The connections between board and remote controls must be made
with shielded cable (make sure the shield is continuous throughout the
length of the cable) consisting of 2 twisted 0.5 mm² wires and the
shield. The shield must be connected to the earth screw on the panel
(on one side only). The maximum distance allowed is 30 m. Lay the
cables far from the power cables or cables with a different voltage and
cables that emit electromagnetic disturbance. Do not lay the cables
close to equipment that could create electromagnetic interference.
SCR - Remote control selector (control with clean contact)
SEI - Summer/winter selector (control with clean contact)
DSP - Double set-point selector (DSP accessory) (control with clean
contact)
FDL - Forced download compressors (FDL accessory) (control with
clean contact)
CACS - Domestic hot water diverter valve consent or RC100 / DS
recovery activation consent (control with potential free contact or
temperature probe)
CS - Shifting Set-point (CS accessory) (4÷20 mA signal)
LFC1 - Compressor 1 operation light (230 Vac voltage consent)
LFC2 - Compressor 2 operation light (230 Vac voltage consent)
LBG - Machine general lock light (consensus in voltage 230 Vac)
VACS - DHW deviator valve control (voltage consent 230 Vac,
maximum load 0.5A AC1)
57
ADVANCE