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HDWA-SVX002C-EN
Electrical Requirements
Installation Requirements
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.
Unit-mounted Adaptive Frequency™ Drives (AFDs) are
standard on all units. While this option eliminates most
field-installed wiring requirements, the electrical contractor
must still complete the electrical connection for the
following:
• power supply wiring to the AFD
• other unit control options present
• any field-supplied control devices
• Air-Fi®
• Wi-Fi
As you review this manual along with the wiring instructions
presented in this section, keep in mind that:
• All field-installed wiring must conform to National
Electric Code (NEC) guidelines, and any applicable
local, state, and national 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,
and locked rotor amps) is listed on the chiller
nameplate.
• Use copper conductors to connect the three-phase
power supply to the AFD's Line Potential Main Circuit
Breaker.
• All field-installed wiring must be checked for proper
terminations, and for possible shorts or grounds.
Note: Always refer to the actual wiring diagrams that
shipped with the chiller or the unit submittal for
specific as-built electrical schematic and
connection information.
NOTICE
Adaptive Frequency Drive (AFD)/Starter
Component Damage!
Failure to remove debris from inside the AFD/starter
panel could result in an electrical short and could
cause serious AFD/starter component damage.
Do NOT modify or cut enclosure to provide electrical
access. Removable panels have been provided, and any
modification should be done away from the enclosure. If
the AFD enclosure must be cut to provide electrical access,
exercise care to prevent debris from falling inside the
enclosure. Refer to submittal drawings.
Electrical Requirements
Before wiring begins, observe the following electrical
requirements:
• Follow all lockout/tagout procedures prior to performing
installation and/or service on the unit.
• Always wear appropriate personal protective
equipment.
• Wait the required time to allow the capacitor(s) to
discharge; this could be up to 30 minutes.
• Verify that all capacitors are discharged prior to service
using a properly rated volt meter.
• Use appropriate capacitor discharge tool when
necessary.
• Comply with the safety practices recommended in
PROD-SVB06*-EN.
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.
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