LG ACHH017VBAB Installation And Owner's Manual page 94

ELECTRICAL
Wiring / Cable Installation
Communication Cable Installation
1. Use 18 AWG two-conductor, twisted, stranded, shielded cable for communication. Ensure the communication cable shield is properly
grounded to the Chiller chassis only. If one-conductor cable is used, it will result in poor communication quality.
2. Use only the regulated communication cable.
• Do not use multiple lines. It can cause communication errors.
• Do not install the communication cable parallel to the power wiring. It can cause communication errors.
Power Wiring / Installation
WARNING
• Power must be completely shut off during chiller installation. There is a risk of fire, electric shock, physical injury and / or death.
• .Because there may be more than one (1) cutoff switch, attach warning labels to all cutoff switch locations so that power is not turned on
until all installation work is complete. There is a risk of fire, electric shock, physical injury and / or death.
• Power supplied to the chiller must fall within the voltage minimum to maximum range listed in the Electrical Data tables, and on the product
nameplates. Refer to the electrical data tables, and the wiring diagrams for information. Improper power supply can cause fire, electric
shock, physical injury and / or death.
1. Power.
The power supply must be within the specifications of the chiller's nameplate. Supplied voltage must fall within listed minimum and maximum
limits.
2. Power Wiring and Connections.
• For information on how to connect the power wiring, refer to the
wiring diagrams in the technical manuals, or on the chiller access
covers.
• Connect R, S, T, and N of the power wiring separately to the circuit
breaker if installing one (1) chiller.
• All power wiring must comply with applicable federal, state, and
local regulations.
• Do not shut off the power unless the chiller will not be used or
will not be operating for an extended period. Power must be turned
on approximately six (6) hours before operating the chiller. If power
is not provided to warm the oil on the bottom of the compressor, it
can result in a damaged and / or an inoperable system.
3. Control Power.
Table 14: Power Wiring Specifications.
Model No. Tons
ACAH020HETB 20
All control power used as a part of potential operation and approved internal bus wiring is provided inside the unit.
4. Additional Wiring / Cable Connections.
94
Power Wiring Specifications
(AWG x No.)
460V
10 × 4
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Figure 38: R, S, T, and N Power Wiring and Connections.