RTAF-SVX001K-EN
45
Installation Electrical
General Recommendations
As you review this manual, keep in mind that:
•
All field-installed wiring must conform to National
Electric Code (NEC) guidelines, and any applicable
state and local codes. Be sure to satisfy proper
equipment grounding requirements per NEC.
•
Compressor motor and unit electrical data (including
motor kW, voltage utilization range, rated load amps)
is listed on the chiller nameplate.
•
All field-installed wiring must be checked for proper
terminations, and for possible shorts or grounds.
Note:
Always refer to wiring diagrams shipped with
chiller or unit submittal for specific electrical
schematic and connection information.
Important:
To prevent control malfunctions, do not run
low voltage wiring (<30 V) in conduit with
conductors carrying more than 30 volts.
Installer-Supplied Components
Power Supply Wiring
Cut holes into the sides of the control panel for the
appropriately-sized power wiring conduits. The wiring is
passed through these conduits and connected to the
terminal blocks or circuit breakers.
To provide proper phasing of 3-phase input, see field
wiring drawings for correct wiring. Proper equipment
grounds must be provided to each ground connection in
the panel.
Control Power Supply
Chiller is provided with control power transformer. It is not
necessary to provide additional control power voltage to
the unit. No other loads should be connected to the control
power transformer.
All units are factory-connected for appropriate labeled
voltages.
Heater Power Supply
It is required to provide an independent power source
(115V 60Hz, 220V 50Hz) with a fused-disconnect. The
heaters are factory wired back to the unit control panel (at
terminals 1X6-1 and 1X6-2).
The evaporator shell is insulated from ambient air and
protected from freezing for temperatures down to -4°F by
shell trace heaters and two thermostatically-controlled
immersion heaters, combined with evaporator pump
activation through Symbio™ 800. Whenever the ambient
temperature drops below 32°F, the thermostat energizes
the heaters and the Symbio™ 800 activates the pumps. If
ambient temperatures below -4°F are expected, contact
your Trane local office.
WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
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 discharge of
capacitors. Verify with a CAT III or IV voltmeter rated per
NFPA 70E that all capacitors have discharged.
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury.
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements for
field wiring installation and grounding as described in
NEC and your local/state/national electrical codes.
NOTICE
Use Copper Conductors Only!
Failure to use copper conductors could result in
equipment damage as the equipment was not designed
or qualified to accept other types of conductors.
NOTICE
Use Copper Conductors Only!
Failure to use copper conductors could result in
equipment damage as the equipment was not designed
or qualified to accept other types of conductors.
NOTICE
Evaporator Damage!
Failure to follow instructions below could result in
evaporator damage.
A qualified technician must frequently verify power to
the heat tape and confirm operation of the heat tape
thermostat. Control panel main processor does not
check for loss of power to the heat tape, nor does it
verify thermostat operation.