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Due to our policy of continuous product innovation, some specications may change without notication.
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LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG ” is a registered trademark of LG Corp.
64 | REFRIGERANT DESIGN
Single Zone Mega Wall Mounted Engineering Manual
Figure 46: LSU90-120HEV1, LSU90-120HXV
Outdoor Unit Electrical Connection.
ELECTRICAL CONNECTIONS
Figure 47: LSU180HEV1 Outdoor Unit
Electrical Connection.
Figure 48: LSU240HEV1 Outdoor Unit
Electrical Connection.
Terminal Block
Connecting
Cable
Power
Supply
Cord
Conduit Panel
Tubing Cover
Over 0.2”
Terminal Block
Over 0.2”
Terminal Cover
Conduit Panel
Connecting
Cable
Power Supply
Cord
1(L1) 2(L2) 1(L1) 2(L2)
3
Outdoor Electrical Connection
1. Remove the control cover from the unit by loosening the fastening screw (Figures 46 to 48).
2. Take off the caps on the conduit panel.
3. Connect both the power supply and low voltage lines to the corresponding terminals on the terminal block (terminals block may be differ-
ent depending on model).
4. Be sure to ground the unit by following local codes.
5. Allow for enough length (add several inches) for each wiring.
6. Secure the cable with a cord clamp.
7. Secure conduit tubes with lock nuts.
8. Reattach the control cover to the original position with the fastening screw.
Conduit cover
Piping connection
Tubing cover
Terminal Block
1(L1) 2(L2)1(L1) 2(L2)
3
Power
connecting
cable
Power
cord
Cord clamp
90-120HEV1
1(L) 2(N)L N
3
90-120HXV
Figure 49: Circuit Breaker.
• 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 connec-
tion between the indoor and outdoor unit to avoid electrical shock, which may
cause physical injury or death.
Air
Conditioner
Main Power Source
Circuit Breaker
Use a circuit breaker
or time delay fuse
• 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.
• 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 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.
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