LG LD097HV4 Engineering Manual page 43

Ducted Indoor Unit Power Wiring / Communications Cable Connections
1. To access the terminal block, first detach 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
access 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. (For power wiring / communications cable between
the single zone outdoor unit and the indoor unit, use a four-conductor, stranded,
shielded or unshielded wire. If shielded, the wire must be grounded to the chassis
at the outdoor unit only.)
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. Secure the power wiring / communications cable with the cable restraint.
5. Reattach 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.
Do not apply force to the wiring connections when clamping.
•
• Neatly arrange the wiring.
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.
Always use a circuit breaker or time delay fuse when connecting electrical wiring to the unit.
• Separately wire the high and low voltage lines. There is a risk of electric shock, physical
injury, or death.
• Use heat-proof electrical wire capable of withstanding temperatures up to 167°F to avoid
wiring malfunction and electrical shock, which may cause physical injury or death.
• Ensure you connect the wire firmly. Loose wiring may cause unit malfunction, the wires to
burnout or the terminal to overheat and catch fire. There is a risk of electric shock, physical
injury or death.
• Use outdoor and waterproof connection cable rated up to 300V for the connection between
the indoor and outdoor unit to avoid electrical shock, which may cause physical injury or death.
• Separately wire the high and low voltage lines to avoid damage to unit.
• Use heat-proof electrical wire capable of withstanding temperatures up to 167°F to avoid damage to unit.
• Always use a circuit breaker or time delay fuse when connecting electrical wiring to the unit.
• Connect the wire firmly. Loose wiring may cause unit malfunction, the wires to burnout or the terminal to overheat and catch fire. There is
a risk of equipment malfunction or property damage.
• Use outdoor and waterproof connection cable rated up to 300V for the connection between the indoor and outdoor unit to avoid damage
to the unit.
• Comply with local codes while running wire from the indoor unit to the outdoor unit.
• Do not allow wire to touch refrigerant tubing, the compressor or any moving parts since it can lead to mechanical failure.
ELECTRICAL CONNECTIONS
Do not catch the wiring in the electric box cover. Ensure the cover firmly closes.
Figure 36: Ducted Indoor Unit Terminal Block Location / Using a Conduit.
1(L1) 2(L2)
Power Supply
(208-230V)
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 35: Accessing the Indoor Unit Terminal Block.
Control Box Cover
3(A) 4(B)
Communication
Figure 34: Circuit Breaker/Time Delay Fuse Con-
nection.
Terminal Block
Control Box
Conduit
1(L1) 2(L2)
Conduit
Power Wiring
Connections
Main Power Source
Air
Circuit Breaker
Conditioner
Use a circuit breaker
Or time delay fuse
A
Lock nut
Conduit
mounting
plate
3
Lock Nut
Conduit
Mounting
Plate
DUCTED | 43