Trane CVHH CenTraVac, Installation, Operation And Maintenance Manual

Page: 59 / 128

CVHH-SVX001G-EN 59
Figure 38. Proper phasing for starter power supply
wiring
L1
L2 L3
G
L1
L2 L3
G L1
L2 L3
G
G G
L1 L2 L3 L1 L2 L3
L3
L2 L1
G
L3
L2 L1
G L3
L2 L1
G
G G
L3 L2 L1 L3 L2 L1
Unit-mounted Starters
Remote-mounted Starters
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.
CE for Control Power Transformer
Option
IIm mp po orrtta an ntt:: 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.
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