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AC-SVX003A-EN
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.
WARNING
Hazardous Voltage - Pressurized
Flammable Fluid!
Failure to follow all electrical safety precautions could
result in death or serious injury.
Do not operate compressor without terminal box
cover in place.
The motors in the compressors have strong
permanent magnet motors and have the capability to
generate voltage during situations when the
refrigerant charge is being migrated. This potential
will be present at the motor terminals and at the
output of the variable speed drives in the power panel.
Before removing compressor terminal box cover for
servicing, or servicing power side of control panel,
CLOSE COMPRESSOR DISCHARGE SERVICE VALVE
and disconnect all electric power including remote
disconnects. Discharge all motor start/run capacitors.
Follow lockout/tagout procedures to ensure the
power cannot be inadvertently energized. Verify with
an appropriate voltmeter that all capacitors have
discharged.
The compressor contains hot, pressurized refrigerant.
Motor terminals act as a seal against this refrigerant.
Care should be taken when servicing NOT to damage
or loosen motor terminals.
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.
Important: To prevent control malfunctions, do not run low
voltage wiring (30 V) in conduit with
conductors carrying more than 30 volts.
Units with Nitrogen Charge
Option
For units with nitrogen charge
option, the unit must NOT have
shore power, or unit power
applied until the unit has been
charged. Applying power will
drive EXV valves closed, and
will inhibit sufficient vac for unit
charging.
Installer-Supplied Components
Customer wiring interface connections are shown in the
electrical schematics and connection diagrams that are
shipped with the unit. The installer must provide the
following components if not ordered with the unit:
• Power supply wiring (in conduit) for all field-wired
connections.
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