LG LH247HV Engineering Manual page 65

Always use a circuit breaker or time delay fuse when connecting electrical wiring to the unit.
• 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.
Connecting the Power Wiring / Communications Cable to the indoor unit
1. To access the terminal block, first unscrew the cover from the control box.
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 ac-
cess holes to prevent damage. To prevent electromagnetic interference and product
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. Ver-
ify that the color and terminal numbers from the outdoor unit wiring match the color
and terminal numbers on the indoor unit.
4. Secure the power wiring / communications cable with the cable restraint.
5. Screw the steel clamp to the inside of the control panel.
• Place the wiring / cables in the clamp and tighten the plastic clamp to an open
surface of the control panel.
• When clamping, do not apply force to the wiring connections.
• Neatly arrange the wiring, do not catch the wiring in the electric box cover, and ensure the cover firmly closes.
6. Fill in any gaps around the wiring access holes with sealant to prevent foreign particles from entering the indoor unit.
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 66: Indoor Unit Terminal Block Location / Using a Conduit.
1(L1) 2(L2)
3(A)
Power Supply
Communication
(208-230V)
Due to our policy of continuous product innovation, some specifications may change without notification.
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eleCtriCal ConneCtionS
Figure 64: Circuit Breaker/Time Delay Fuse
Connection.
Main Power Source
Conditioner
Figure 65: Accessing the Indoor Unit Terminal Block.
Control Box Cover
4(B)
Wiring connections
Air
Circuit Breaker
Use a circuit breaker
Or time delay fuse
Terminal Block
Control Box
Lock nut
Conduit
1(L1) 2(L2)
Power Wiring Connections
Lock Nut
Conduit
duct (HIgH StatIc) | 65
A
Conduit
mounting
plate
3
Conduit
Mounting
Plate