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ELECTRICAL CONNECTIONS
General Power Wiring / Communications Cable Guidelines
• Follow manufacturer's circuit diagrams displayed on the inside of
the control box cover.
• Confirm power source specifications.
• Properly ground the ODU and the IDU per National Electrical Code
(NEC) and local codes.
• Connect the wiring firmly so that the wires cannot be easily pulled
out.
• Confirm that the electrical capacity is sufficient.
• Power supply to the outdoor unit must be selected based on NEC
and local codes. Maximum allowable voltage fluctuation ±10% or
nameplate rated value.
• It is recommended that a circuit breaker is installed, especially if
conditions could become wet or moist.
• Include a disconnect in the power wiring system. Add an air gap
contact separation of at least 1/8 inch in each active (phase)
conductor.
• Any openings where the field wiring enters the cabinet must be
completely sealed.
Power Supply / Power Wiring
• LG Single Zone Four-Way Cassette systems operate at 1Ø, 208-230V, 60Hz.
• Power wiring / power wiring gauge to the outdoor unit(s) must be solid or stranded, and must comply with all National Electrical Code
(NEC), UL, and local electrical codes.
• The indoor unit is powered by the outdoor unit. See below and the next page for communication / connection (power) cable specifications
from the outdoor unit to the indoor unit.
• Ground wire must be longer than the common power / communication wires.
• Connect the wiring firmly so the wires cannot be easily pulled out.
• Always match color codes of each wire and follow wiring diagram.
•
Do not install power wiring to the outdoor unit and the communication / connection (power) cable to the indoor unit in the same conduit.
Use separate conduits.
WARNING
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NOTE
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40 | PRODUCT DATA
©
Figure 29: General Four-Way Ceiling Cassette System Power / Communica-
tions System Schematic (Appearances May Vary).
L
N
Power Supply
Main Switch
G
L
N
Circuit Breaker
Fuse
Power Wiring
(Including Ground)
Outdoor Unit
Terminal Block Outdoor
Terminal Block Outdoor
1(L1) 2(L2)
1(L1) 2(L2) 3
Power
Communication
Wiring
Cable
1(L1) 2(L2)
3
Terminal Block Indoor
Indoor Unit
-
-
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