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Figure 40. Proper phasing for starter power supply
wiring
Unit-mounted Starters
L3 L2 L1 G
G
L3 L2 L1
Remote-mounted Starters
L1 L2 L3 G
G
L1 L2 L3
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 National Electric Code (NEC) or local
guidelines.
CDHH-SVX003C-EN
L3 L2 L1 G L3 L2 L1 G
G
L3 L2 L1
L1 L2 L3 G L1 L2 L3 G
G
L1 L2 L3
CE for Control Power Transformer
Option
Important: For the Control Power Transformer (CPTR)
option, chiller-mounted/UPS power, the
customer needs to ensure that the supply is
NOT taken from public low voltage supplies,
and that a dedicated clean source of private
power supply is used for chiller-mounted
CPTR option when a CE chiller is selected.
This also includes when CPTR option is
standard such as in customer-supplied
starters and remote-mounted medium-voltage
Adaptive Frequency™ Drives (AFDs).
All customer wiring, including power wiring to starters/
drives/CPTR Option/UPS shore power, needs to be
separated: 24–27 Vdc, 110–120 Vac, and 380–600 Vac
each need to be in separate conduit runs.
For 110/120 V customer wiring, including main power
supply to CPTR option, it is required that the customer
provides some sort of surge protection ahead of it, and all
customer wiring needs to be run in conduit. Any Ethernet
cables being used by customer to interface with the Trane
chiller must be shielded Ethernet cabling.
The customer is required to provide an overcurrent device
upstream of the CPTR option in accordance with
International Electrotechnical Commission (IEC) standards
and/or any applicable local and national codes.
The customer is required to follow all local, national, and/or
IEC codes for installation.
Service personnel must use proper PPE for servicing and
should also use proper lockout/tagout procedures during
servicing. The customer should also disconnect the main
supply disconnecting device upstream of the starter or
drive first before performing any service on any part of the
chiller, including the CPTR option, related controls, and oil
pump motor circuits. In addition, service personnel should
first disconnect the supply disconnecting device upstream
of the CPTR option before performing any service on the
CPTR option or its related circuits. Lock the CPTR option
enclosure panel disconnect handle before servicing to
prevent accidental pulling of the disconnect handle.
Power Supply Wiring
®
59
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