Acoustic Protection; Electrical Power Supply - Trane Flex II Series Installation Operation & Maintenance

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ACOUSTIC PROTECTION

When the sound level must be checked in particular, it is necessary to pay maximum WARNING in isolation from
the base of the unit properly applying the anti-vibration mounts (provided optionally). Also, install flexible
joints on water connections.
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ELECTRICAL POWER SUPPLY

The mains power supply characteristics have to match the unit's absorption. The mains power supply tension must
correspond to the nominal value ± 10%, with a maximum difference between the phases of 2%. All power supply wiring
must be sized and selected accordingly by the project engineer in accordance with standard IEC 60364. All wiring must
comply with local code
6.1 POWER CONNECTIONS
Protect the unit electric box power supply circuit with protection devices (not included in the supplied
equipment). Connect the line terminals with a three-core cable of a section which is appropriate to the
machine absorption. The switch and the fuses like all the power connections must comply with the regulations
in force.
6.2 IMBALANCE BETWEEN THE SUPPLY TENSION PHASES
Do not run the electrical motors when the voltage unbalance between the phases is more than 2%.
Use the following formula to check:
% Imbalance = [(Vx – Vave) x 100/Vave]
Vave = (V1 + V2 + V3)/3
Vx = phase with greatest difference from Vave (without regard to the sign)
IMPORTANT: If the mains voltage has an imbalance of above 2%, contact the company, which distributes the electrical
energy. If the unit functions with a unit voltage imbalance between the phases of above 2% the guarantee is invalid.
6.3 UNIT VOLTAGE PHASING
It is important that proper rotation of the compressors be established before the unit is started. Proper motor
rotation requires confirmation of the electrical phase sequence of the power supply. The motor is internally
connected for clockwise rotation with the incoming power supply phases A-B-C.
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