Wall Mounted Installation Manual

41
Installation Manual
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.
MAX
MULTI
F
MULTI
F
LG Terminal Connections
LG uses a “JIS” type of screw for all terminals; use a JIS screwdriver to tighten and
loosen these screws and avoid damaging the terminal. Do not over tighten the
connections — over tightening will damage the terminals — but firmly and securely at-
tach the wiring in a way to prevent external forces from being imparted to the terminal
block.
• The terminals labeled “GND” are NOT ground terminals. The terminals labeled
ARE ground terminals.
• Polarity matters. Always connect “A” to “A” and “B” to “B.”
• Always create a wiring diagram that contains the exact sequence in which all the indoor units and branch distribution units (Multi F MAX with
LGRED systems only) are wired in relation to the outdoor unit.
•
Do not include splices or wire nuts in the communication cable.
Figure 60: JIS Screws.
WIRING
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• Always have a trained service provider properly ground the outdoor unit. If the outdoor unit is not properly grounded, there is a risk of electric
shock, physical injury, or death.
• Provide a circuit breaker between the power source and the outdoor unit. Failure to do so will cause bodily injury or death.
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• Multi F and Multi F MAX with LGRED systems operate at 1Ø, 208-230V, 60Hz, and power is wired to the outdoor unit only. The outdoor unit
will supply power to the indoor units and the branch distribution units (Multi F MAX with LGRED systems only) through the communication /
connection (power) cable (indoor units and branch distribution units draw minimum power). See the Multi F Outdoor Unit Installation Manual
for information.
• Select power supply wire type and size based on NEC and local codes. Maximum voltage fluctuation ±10% of the nameplate rated value.
• Properly ground the outdoor unit / indoor units / branch distribution units per NEC and local codes.
• Ground wire must be longer than the common power / communication wires.
• Connect the wiring firmly so the wires cannot be easily pulled out.
• Refer to the inside of the chassis cover or control cover for circuit and terminal block diagrams.
• Always match color codes of each wire and follow wiring diagram.
•
Do not install power wiring to the outdoor unit and the communication / connection (power) cable to the indoor unit in the same conduit.
Use separate conduits.