Outdoor Unit Electrical Connections - LG LA090HYV3 Installation Manual

ELECTRICAL SYSTEM INSTALLATION
Connecting Outdoor Unit Wiring
• Verify that main power is completely off and that no power is going through the Single Zone system before proceeding with these steps. Failure
to do so will cause electric shock, bodily injury and / or death
• Follow all safety and warning information outlined at the beginning of this manual. Failure to do so will cause electric shock, bodily injury and
/ or death.
• Per code, install a main indoor breaker, and an outdoor service disconnect that interrupts all power sources simultaneously. There is risk of
fire, electric shock, explosion, physical injury or death.
• Verify that the circuit breaker or some other emergency power cutoff device is in place before any power wiring is done to the system. Failure
to do so will cause electric shock, bodily injury and / or death.
• Review the "Electrical Specifications" in the "Product Data" section of this manual, or the outdoor unit nameplate for the correct electrical
requirements. Failure to do so will cause fire, electric shock, bodily injury and / or death.
• Never touch any power lines or live cables before all power is cutoff to the system. To do so will cause bodily injury or death.
• Follow all safety and warning information outlined at the beginning and throughout this manual. Failure to do so will cause unit failure.
• Connect the communication / connection (power) cable to the outdoor unit by matching the terminals on the outdoor unit control board. Verify
the color of the wires at the indoor unit, along with the terminal numbers, match those for the outdoor unit.
• Images are representative; actual appearance will vary.
• Refer to the circuit diagram on the outdoor unit panel.
Connecting Outdoor Unit Power Wiring and
Communication / Connection (Power) Cable
1. Confirm that electrical power supply capacity will be sufficient to run the unit. Verify
that a circuit breaker and service disconnect are installed. See the "Electrical
Specifications" in the "Product Data" section for details on electrical requirements.
Per code, install a main indoor breaker, and an outdoor service disconnect that interrupts
explosion, physical injury or death.
2. Confirm that the right gauge size is used for all wiring. Follow
all federal, state, and local codes related to power wiring to the
outdoor unit. For specifications related to communication / connec-
tion (power) cable from the outdoor unit to the indoor unit, see the
information detailed in this section.
3. LAU090HYV3 / LAU120HYV3 outdoor units have a piping cover
that protects the piping and electrical connections. Using a Phillips
head screwdriver, remove the one (1) screw, and guide the piping
cover out as shown.
4. LAU150HYV3 / LAU180HYV3 / LAU240HYV3 outdoor units have a side panel to protect the electrical
components. Using a Phillips head screwdriver, remove the four (4) screws, and guide the side panel
down and out as shown.
5. Inspect all interior wiring to be sure they are secure and have not loosen during transportation and out-
door unit installation. Also, inspect wires for damage or cracks.
Loose, damaged, or cracked wires will cause electric shock, bodily injury and / or death.
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Due to our policy of continuous product innovation, some specifications may change without notification.
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Figure 100: Circuit Breaker.
Main Power Source
Air
Conditioner
Figure 101: Accessing the
LAU090HYV3 / LAU120HYV3
Outdoor Unit Terminal Block.
Circuit Breaker
Use a circuit breaker
or time delay fuse
Figure 102: Accessing the
LAU150HYV3 / LAU180HYV3
/ LAU240HYV3 Outdoor Unit
Terminal Block.