Trane CITY RTSF Series Manual page 22

Installation - Electrical
Power Supply Wiring
Model RTSF chillers are designed according to European standard EN 60204-1; therefore, all power supply wiring
must be sized and selected accordingly by the project engineer.
Water Pump Power Supply
Provide power supply wiring with fused disconnect for both the chilled water and condenser water pumps.
Electrical Panel Power Supply
Power supply wiring instructions for the starter/control panel are:
Run the line voltage wiring in conduit to the access opening(s) on the starter/control panel. See the product catalog
for wire sizing and selection information and refer to general data that show typical electrical connection sizes and
locations. Always refer to submittal information for your actual unit specifi cations.
Some connections required the user to provide an external source of power. The 110V control power transformer is
not sized for additional load.
CAUTION
Unit with AFD version must not be linked to the neutral wiring of the installation.
Units are compatible with the following neutral operating conditions:
TNS IT
Standard Special
- on request
Differential protection should be suited for industrial machinery with current leak which can be higher than 500 mA
(several motors and frequency drives).
CAUTION! To avoid corrosion, overheating or general damage, at terminal connections, unit is designed for copper
Conductors only. In case of aluminum cable, bi-material connecting devices are mandatory. Cable routing inside
control panel should be made case by case by installer.
Compressor Motor Phase Sequencing
Always verify that proper rotation of the chiller compressor is established before the machine is started. Proper
motor rotation requires confi rmation of the electrical phase sequence of the power supply. The motor is internally
connected for clockwise rotation with the incoming power supply phased A, B, C (L1, L2, L3).
To confi rm the correct phase sequence (ABC), use a phase meter.
Basically, voltages generated in each phase of a polyphase alternator or circuit are called phase voltages.
In a 3-phase circuit, 3 sine wave voltages are generated, differing in phase by 120 electrical degrees. The order in
which the 3 voltages of a 3-phase system succeed one another is called phase sequence or phase rotation. This
is determined by the direction of rotation of the alternator. When rotation is clockwise, phase sequence is usually
called "ABC. "
This direction may be reversed outside the alternator by interchanging any two of the line wires. It is this possible
interchange of wiring that makes a phase sequence indicator necessary if the operator is to quickly determine the
phase rotation of the motor.
Module and Control Panel Connectors
All connectors can be unplugged or the wires can be removed. If an entire plug is removed, make sure the plug and
the associated jack are marked for proper location identifi cation during reinstallation.
All electrical drawings, schematics and control panel layout are included in the documentation package sent with
the chiller.
22
TNC TT
Special Special
- on request - on request
RLC-SVX023B-GB