LG LC187HV, Engineering Manual, Page: 69 / 76

• The circuit diagram is subject to change without notice.
• Connect the wiring following the wiring diagram and the color codes.
• Firmly attach the wiring so the wires cannot be pulled out easily.
• Comply with local codes while running wire from the indoor unit to the outdoor unit.
• Be sure to firmly connect the wiring.
• Separately wire the high and low voltage lines.
• Use heat-proof electrical wiring capable of withstanding temperatures up to 167 ° F.
• Use outdoor and waterproof connection cable rated up to 300V for the connection
between indoor and outdoor unit.
• Do not allow wire to touch refrigerant tubing, the compressor or any moving parts.
eleCtriCal ConneCtionS
Always use a circuit breaker or time delay fuse when connecting electrical wiring to the unit.
Figure 66: Circuit Breaker/Time Delay Fuse
Connection.
Air
Conditioner
Main Power Source
Circuit Breaker
Use a circuit breaker
Or time delay fuse
Connecting the Power Wiring / Communications Cable to the indoor unit
Lock Nut
Conduit
Mounting
Plate
Conduit
Wiring / Cable Connections
Power Wiring
Wired
Controller
Cable
Control Box Cover Control Box
Cover Screws
1. To access the terminal block, open the control box cover.
2. Insert the power wiring / communications cable from the outdoor unit through the
sides of the indoor unit and control box. Pass the wiring through the designated
access holes to prevent damage. To prevent electromagnetic interference and prod-
uct malfunction, leave a space between the power wiring and communications cable
outside of the indoor unit.
3. Connect each wire to its appropriate terminal on the indoor unit control board. Verify
that the color and terminal numbers from the outdoor unit wiring match the color and
terminal numbers on the indoor unit.
4. Neatly arrange power wiring / communications cable and secure with the appropriate
cable restraint. When clamping, do not apply force to the wiring connections.
5. Firmly reattach the control box cover, do not catch the wiring in the electric box
cover and make sure the cover firmly closes.
6. Fill in any gaps around the wiring access holes with sealant to prevent foreign parti-
cles from entering the indoor unit.
Figure 67: Power Wiring and Communications
Cable Connection Access.
Using a Conduit
1. Remove the rubber stopper on the indoor unit.
Pass the power wiring / communications cable
through the conduit, the conduit mounting
plate, and to / through the control panel of the
indoor unit.
2. Connect the power wiring / communications
cable to the indoor unit terminal block.
3. Screw the conduit mounting plate to the
indoor unit.
4. Tighten the conduit and the conduit mounting
plate together.
Figure 68: Indoor Unit Terminal Block
Location / Using a Conduit.
Wiring connections
Due to our policy of continuous product innovation, some specifications may change without notification.
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Electrical Connections and Mechanical Specs