Electrical Panel And Electrical Data - Trane CGWF SE Installation Operation & Maintenance

9 ELECTRICAL PANEL AND ELECTRICAL DATA

• 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 standardized values - Maximum Amps –Maximum kilo Watts are displayed on the 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.
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 connections 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 suitable for TN-S system
and no additional power supply is necessary. If the unit is powered by a TN-C, TT or IT power supply system the Trane
catalogue option "power supply without neutral 400V/3ph/50Hz" must have been ordered and implemented in the unit's
electrical cabinet. The entrance for the power cables is provided on the bottom of the box where a dismountable flange
suitable for the purpose is provided.
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.
The unit has an antifreeze heater installed directly into the evaporator. The 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 ensured 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 diagram of the unit for wiring.
WARNING To avoid corrosion, overheating or general damage, at terminal connections, unit is designed for copper
conductors only. In case of aluminum conductors an intermediate connection box must be added. In case of aluminum
cable bi material connecting device is mandatory. Cable routing inside control panel should be made case by case by installer.
WARNING Hazardous Voltage with Capacitor! Disconnect all electric power, including remote disconnects and discharge
all motor start/run and capacitors before servicing. Follow proper lock out/tag out 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 5 minutes for units that are equipped with variable frequency drive (0V DC) before touching
any internal components. Failure to follow these instructions could result in death or serious injury.
IMPORTANT if the unit is powered by a TT power supply system a differential protection should be suited for industrial machinery
with current leak than can be higher than 500 mA (several motors and frequency drives)
VERY IMPORTANT due to the fact that the unit doesn't mount a refrigerant high pressure safety valve and therefore the safety
device for a high pressure event is the high pressure switch, shunt trip coils are installed on compressors automatic circuit breakers
in order to ensure the compressors stop in case a high pressure event should occur and in the same moment the electronic control
shouldn't work properly. This implies that if a high pressure event should occur a manual reset of the compressors
automatic circuit breakers is needed.
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