Carrier AquaEdge 23XRV Installation Instructions Manual Download Page 49

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NOTES FOR FIG. 56

GENERAL

1.0

Variable frequency drive (VFD) shall be designed and manufac-
tured in accordance with Carrier engineering requirements.

1.1

All field-supplied conductors, devices and the field-installation
wiring, termination of conductors and devices, must be in com-
pliance with all applicable codes and job specifications.

1.2

The routing of field-installed conduit and conductors and the
location of field-installed devices, must not interfere with
equipment access or the reading, adjusting or servicing of
any component.

1.3

Equipment installation and all starting and control devices
must comply with details in equipment submittal drawings and
literature.

1.4

Contacts and switches are shown in the position they would
assume with the circuit de-energized and the chiller shutdown.

POWER WIRING TO VFD

2.0

Provide a means of disconnecting branch feeder power to VFD.
Provide short circuit protection and interrupt capacity for branch
feeder in compliance with all applicable codes.

2.1

If metal conduit is used for the power wires, the last 4 feet or
greater should be flexible to avoid transmitting unit vibration into
the power lines and to aid in serviceability.

2.2

Line side power conductor rating must meet VFD nameplate
voltage and chiller minimum circuit ampacity.

2.3

Lug adapters may be required if installation conditions dictate
that conductors be sized beyond the minimum ampacity
required. Circuit breaker lugs will accommodate the quantity (#)
and size cables (per phase) as follows:

NOTE: If larger lugs are required, it may be possible to purchase them
from the manufacturer of the circuit breaker.

2.4

Compressor motor and controls must be grounded by using
equipment grounding lug provided inside unit mounted VFD
enclosure.

CONTROL WIRING

3.0

Field-supplied control conductors to be at least 18 AWG (Ameri-
can Wire Gauge) or larger.

3.1

Ice build start/terminate device contacts, remote start/stop
device contacts and spare safety device contacts, (devices not
supplied by Carrier), must have 24 VAC rating. Max current is
60 mA, nominal current is 10 mA. Switches with gold plated
bifurcated contacts are recommended.

3.2

Without pilot relays, each integrated contact output can control
loads (VA) for tower fan low, tower fan high alert, alarm is rated
to a maximum of 1 amp AC RMS at 24 VAC. Chilled and con-
denser water pumps outputs are supplied with a pilot relay with
contact rating 8 amp at 250 VAC.

Do not use control transformers in the control center as the
power source for external or field-supplied contactor coils, actu-
ator motors or any other loads.

3.3

Do not route control wiring carrying 30 V or less within a con-
duit or tray which has wires carrying 50 V or higher or along
side wires carrying 50 V or higher. For field wiring use at least
18 AWG (American Wire Gauge).

CAUTION

Do not use aluminum conductors. Contractor/installer assumes all
liability resulting from the use of aluminum conductors within the
VFD enclosure.

LF2 LUG SIZES

VFD

MAX

INPUT

AMPS

STANDARD 65K AIC

LUG CAPACITY

(PER PHASE)

OPTIONAL 100K AIC

LUG CAPACITY