Access To Electric Panel; Power Supply - Trane Picco R32-140 User& Installer's Manual

CAUTION: Any devices placed nearby can cause / suffer electromagnetic disturbances to / from the unit. Be aware of this
risk at the installation site. It is recommended to electrically power the unit with an adequate line and protections and use
an independent cable duct.
CAUTION: The remote control panel is connected to the chiller by 4 cables with a cross-section of 1.5 mm2. The power cables
must be separate from the remote control cables. Maximum distance 50 metres.
CAUTION: The remote control panel must not be installed in an area with strong vibrations, corrosive gases, excessive dirt or
high humidity. Leave the area near the cooling system clear.
5.9.1 Access to electric panel
The electrical panel is accessible even when the machine is closed and is located on the compressor side. In order to open the panel door, it is
necessary to set the disconnecting switch to OFF and use a double-finned key in both locks.
5.9.2 Power supply
The electrical wiring to the terminal blocks has to be done only by qualified personnel.
Make sure to install an adequate ground connection, incomplete grounding can cause electric shock. The manufacturer can-
not be held responsible for any damage caused by failure or ineffective earthing.
The power cables, electrical protections and line fuses must be sized in accordance with what is reported in the unit's wiring diagram and in the
electrical data contained in the technical characteristics table.
Use a dedicated power line, do not power the appliance through a line to which other users are connected. Fasten the power cables securely and
make sure they do not come into contact with sharp corners. Use double insulated cables with copper wires.
The ground connection must be carried out first during the connection phase, vice versa it must be removed last when the unit is disconnected.
In the event of any loosening of the power cable, it must be ensured that the tension of the active conductors takes place before that of the
ground wire.
A main switch or a disconnection device with adequate breaking capacity must be installed on the power supply line, which has a separation of
the contacts in all the poles. The differential protection switch must be compatible with inverter appliances, it is recommended to install a type
B differential switch, the installation of a different type switch could give rise to untimely trips.
The following table shows the recommended cable sections for a maximum length of 30 m. In any case, depending on type of installation, the
location and the length of the cables (be it less than or greater than 30 m), the electrical system designer will make an appropriate choice.

Power supply

50Hz 400V / 3ph + N +PE
50Hz 400V / 3ph + N +PE
(*) FG16 cable fixed in air at 30°C
The units conform to the specifications for electromagnetic compatibility, however, the designer of the electrical system must make appropriate
assessments to ensure the absence of interference.
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Recommended cable section
Model
140
250 / 260 / 270
Picco R32
Inverter air/water heat pumps with axial fan
Recommended tightening torque
(max length 30m)
*5G10 L1/L2/L3: 3,4 Nm – N/PE: 1 Nm
*5G16 L1/L2/L3: 3,4 Nm – N/PE: 1 Nm