Power Supply Wiring; Three-Phase Power; Circuit Breakers And Fused Disconnects; Power Factor Correction Capacitors (Optional) - Trane CVHE Installation, Operation And Maintenance Manual

Power Supply Wiring

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 electrical codes.

Three-Phase Power

Review and follow the guidelines below to properly install
and connect the power supply wiring to the starter panel:
• Verify that the starter nameplate ratings are
compatible with the power supply characteristics and
with the electrical data on the unit nameplate.
NOTICE:
Starter Component Damage!
Failure to remove debris from inside the starter panel
could result in an electrical short and could cause
serious starter component damage.
NOTICE:
Use Copper Conductors Only!
Failure to use copper conductors could result in
equipment damage as unit terminals are not designed
to accept other types of conductors.
• 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 starter enclosure must be cut to
provide electrical access, exercise care to prevent
debris from falling inside the enclosure.
• Use copper conductors to connect the three-phase
power supply to the remote- or unit-mounted starter
panel.
• Flexible conduit connections are recommended to
enhance serviceability and minimize vibration
transmission.
• Size the power supply wiring in accordance with NEC,
using the RLA value stamped on the chiller nameplate
and transformer load on L1 and L2.
• Confirm that wire size is compatible with lug size stated
in unit submittal.
• Make sure that the incoming power wiring is properly
phased; each power supply conduit run to the starter
must carry the correct number of conductors to ensure
equal phase representation.
CVHE-SVX02H-EN
Note: Connect L1, L2, and L3 (shown below) per
starter diagram provided with chiller.
L3 L2 L1 G L3 L2 L1 G L3 L2 L1 G
G
L3 L2 L1 L3
• When installing the power supply conduit, ensure that
the position of the conduit does not interfere with the
serviceability of any of the unit components, or with
structural members and equipment. Ensure that the
conduit is long enough to simplify any servicing that
may be necessary in the future (e.g., starter).
• Electrical wire torque specifications—follow starter
manufacturer's torque specifications.
Circuit Breakers and Fused
Disconnects
Any field supplied circuit breaker or fused disconnect
installed in power supplied to the chiller must be sized in
compliance with NEC or local guidelines.
Power Factor Correction
Capacitors (Optional)
Power factor correction capacitors (PFCCs) are designed to
provide power factor correction for the compressor motor.
PFCCs are available as an option for unit-mounted starters
and remote mounted starters.
Notes:
• Verify PFCC voltage rating is greater than or equal to
the compressor voltage rating stamped on the unit
nameplate.
• Refer to the wiring diagrams that shipped with the unit
for specific PFCC wiring information.
NOTICE:
Motor Damage!
Failure to wire PFCCs into the starter correctly could
cause misapplication of these capacitors and result in a
loss of motor overload protection and subsequently
cause motor damage.
G
L2 L1
47