Electrical Panel - Trane Flex II Series Installation Operation & Maintenance

ELECTRICAL PANEL

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When reviewing this manual keep in mind.
• All field-installed wiring must be in accordance with local regulations, CE directives and guidelines. Be sure to satisfy
proper equipment grounding requirements according CE
• The following standardized values - Maximum Amps –Maximum kWatts are displayed on unit nameplate.
• All field-installed wiring must be checked for proper terminations, and for possible shorts or grounds.
Ensure total protection against the possible penetration of water into the connection point.
The electrical panel is housed in watertight box, the opening system of the box needs the use of a retractable handle or
dedicated tools, in each case the opening is allowed only after disconnection of the power supply through the main
switch with door lock handle lockable in OFF position.
In order to reduce the electromagnetic interference, the connection between the VSD compressors and the electrical
panel consists out of shielded cables. All the cables and the terminals are univocally numbered according to the
electrical scheme in order to avoid possible misinterpretation. The identification system of the cables connected to the
components allow also an easy and intuitive recognition of the component. Each component of the electrical panel is
provided with an identification plate according to what is shown on the electrical scheme. All the connection to the
electrical panel are made from the bottom and are equipped with cover preventing from break. The electrical panel
supply is 400V/3ph+n/50Hz (TN-S system) and no additional power supply is necessary. The electrical power supply
without neutral 400V/3ph/50Hz is available as option.
The control circuit is powered with 24 VAC. Each unit is provided with auxiliary transformer control circuit 230/24V. It
requires no additional power cable for the control equipment.
Only in the case where it is required to install a separate optional storage tank is necessary to feed separately
antifreeze heater.
The unit has an antifreeze heater installed directly into the evaporator. Each circuit also has an electric resistance
installed in the compressor in order to keep warm the oil and thus avoid the transmigration of the refrigerant in its
interior. Obviously the operation of the electrical resistors is guaranteed as long as the unit is power supplied.
The unit is equipped with an alarm relay, which changes state every time an alarm occurs in one of the cooling circuits.
Connect the terminals as per the wiring diagram on the unit - terminal "X" - a visual or audible alarm or any external
supervision system.
BMS to monitor its operation is allowed. See the wiring of the unit for wiring.
WARNING Hazardous Voltage with Capacitor! Disconnect all electric power, including remote disconnects and discharge
all motor start/run and capacitors before servicing. Follow proper lockout/tagout procedures to ensure the power
cannot be inadvertently energized.
For variable frequency drives or other energy storing components provided by Trane or others, refer to the appropriate
manufacturer's literature for allowable waiting periods for discharges capacitors. Verify with an appropriate voltmeter
that all capacitors have discharged.
After disconnecting input power, wait five (5) minutes for units which are equipped with EC fans and wait twenty (20)
minutes for units which are equipped with variable frequency drive (0V DC) before touching any internal components.
Failure to follow these instructions could result death or serious injury.
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