Power Supply Wiring
D
WARNING
Ground Wire!
All field-installed wiring must be completed by quali-
fied personnel. All field-installed wiring must comply
with NEC and applicable local codes. Failure to follow
this instruction could result in death or serious inju-
ries.
To assure that power supply wiring to the starter panel is
properly installed and connected, review and follow the
guidelines outlined below.
3-Phase Power Source
•
Verify that the starter nameplate ratings are compat-
ible with the power supply characteristics and with
the electrical data on the unit nameplate.
D
NOTICE
Starter Damage!
Debris inside the starter panel may cause an elec-
trical short. Failure to follow this instruction could
result in equipment damage.
D
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.
•
Do not modify or cut enclosure to provide electrical
access. Removable panels have been provided, and
any modification should be done away from the en-
closure. If the starter enclosure must be cut to pro-
vide electrical access, exercise care to prevent debris
from falling inside the enclosure.
•
Use copper conductors to connect the 3-phase power
supply to the remote or unit-mounted starter panel.
•
Flexible conduit connections are recommended to
enhance serviceability and minimize vibration trans-
mission.
•
Size the power supply wiring in accordance with
NEC, using the RLA value stamped on the chiller
nameplate and transformer load on U1 and V1.
•
Confirm that wire size is compatible with lug size
stated in unit submittal.
•
Make sure that the incoming power wiring is prop-
erly phased; each power supply conduit run to the
starter must carry the correct number of conductors
to ensure equal phase representation
Note:
Connect U1, V1, and W1 per starter diagram pro
-
vided with chiller.
W 1 V 1U 1
W 1
P E
V 1U 1
W 1 V 1U 1
P E
W 1 V 1U 1
P E
•
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. Assure
that the conduit is long enough to simplify any ser-
vicing that may be necessary in the future (e.g., start-
er removal).
•
Electrical wire torque specifications - follow starter
manufacturer’s torque specifications.
Circuit Breakers and Fused Dis-
connects
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 Capaci-
tors (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-mount-
ed starters and remote mounted starters.
Note:
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.
RELEASED 10/Mar/2020 06:59:20 GMT
W 1 V 1U 1
P E
•
Steady satae voltage: 0.9 to 1.1 of nominal voltage
Frequency: 0.99 to 1.01 nominal frequency continuously
0.98 to 1.02 short time
