Chiller Unit Control Features For The Afd - Trane Starters Engineering Bulletin

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Chiller Unit Control Features for the AFD

The chiller unit control panel capabilities provide for the control/configuration interface to—and the
retrieval/display of—AFD-related data. AFD standard design features controlled throughTracer
AdaptiView include:
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Digitally-displayed AFD parameters on the AdaptiView panel: output speed in hertz, output speed
in rpm, input frequency, input/output voltage, input/output kW, output/load amps, average input
current, average current in % RLA, load power factor, fault, AFD temperature
In addition, on the AFD enclosure there is a 16-line, 40-character LCD display that can be utilized
by operators as needed. It includes a full comprehensive list of AFD performance parameters. refer
to the Installation, Operation, and Maintenance manual and the AFD manufacturer's
documentation.
The AFD is designed for top entry line power and top or bottom load power exit.The power cable
connections are bolted type. Lugs are not provided. Use copper conductors only for terminal
connections. Failure to do so may cause corrosion or overheating, and AFD damage.
Environmental Ratings
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Design Notes
The AFD should be located within 150 ft of the chiller. If this distance must be exceeded due to
application requirements, contact your localTrane representative.
CTV-PRB004-EN
Displacement power factor is 0.96 at all loads.
Efficiency is 97.7 percent at rated load, 60 Hz.
Soft-start; linear acceleration; coast to stop.
All control circuit voltages are physically and electrically isolated from the power circuit
voltage.
110 percent instantaneous torque available for improved surge control.
Output line-to-line and line-to-ground short circuit protection.
Input protection via surge arrestors.
Kirk key for interlocking the system which prevents unsafe access to doors.
General AFD protection—The AFD includes a comprehensive set of protection features
segmented into the following three categories: 1) Line side level, 2) System level, and 3) Load
side level. For more information, refer to the Installation, Operation, and Maintenance manual.
Near sinusoidal voltage and current waveforms to the motor at all speeds and loads. Output
currentTHD is less than 5 percent.
The control power monitoring system monitors all power.
Power switch device diagnostics detect and protect against device short, over or under gate
voltage loss, of gating, loss of diagnostic feedback, heat sink temperature feedback as well as
overload monitoring and protection.
The drive system shall provide controlled speed over the range from 38 to 60 Hz.
The AFD has a "normal duty" rating of 100 percent continuous current with a short time duty
rating of 110 percent overload for one minute, once every 10 minutes.
Current limited to 100 percent at start, no inrush, true soft start
Motor overload protection
AFD over temperature protection
Phase loss, phase reversal, and phase imbalance protection
Overvoltage and undervoltage protection
-40°F (-40°C) to 158°F (70°C) storage ambient temperature range.
32°F (0°C) to 104°F (40°C) operating ambient temperature range.
Altitude to 3280 ft (1000 m), amperage derate output current above rated altitude up to 9840 ft
(3000 m).
Humidity, 95 percent non-condensing.
Medium-Voltage Starter Types (2,300–6,600 Volts)
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