Installation and Maintenance Manual

RTAE-SVX001B-EN 31
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.
• All electrical enclosures on CE marked chillers (unit
model number digit 13 = C) have an environmental
rating of IP53.
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.
WARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including remote
disconnects and discharge all motor start/run and AFD
(Adaptive Frequency™ Drive) 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 byTrane or others, refer to the
appropriate manufacturer’s literature for allowable
waiting periods for discharge of capacitors. Verify
with an appropriate voltmeter that all capacitors
have discharged.
• DC bus capacitors retain hazardous voltages after
input power has been disconnected. Follow proper
lockout/tagout procedures to ensure the power
cannot be inadvertently energized. After
disconnecting input power, wait five (5) minutes for
the DC capacitors to discharge, then check the
voltage with a voltmeter. Make sure DC bus
capacitors are discharged (0 VDC) before touching
any internal components.
Failure to follow these instructions could result in death
or serious injury.
For additional information regarding the safe discharge
of capacitors, see “Adaptive Frequency™ Drive (AFD
3
)
Capacitor Discharge,” p. 32 and PROD-SVB06A-EN.
WARNING
Hazardous Voltage - Pressurized Burning
Fluid!
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.
Do not operate compressor without terminal box cover
in place.
Failure to follow all electrical safety precautions could
result in death or serious injury.
For additional information regarding the safe discharge
of capacitors, see “Adaptive Frequency™ Drive (AFD
3
)
Capacitor Discharge,” p. 32 and PROD-SVB06A-EN.
WARNING
Proper Field Wiring and Grounding
Required!
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 electrical codes. Failure to
follow code could result in death or serious injury.
NOTICE:
Use Copper Conductors Only!
Unit terminals are not designed to accept other types
of conductors. Failure to use copper conductors could
result in equipment damage.