LG MULTI F Installation Manual page 35

F
MULTI
F
MULTI MAX
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.
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
systems with or without LGRED only) are wired in relation to the outdoor unit.
• Do not include splices or wire nuts in the communication cable.
Power Supply / Power Wiring Specifications
• Multi F and Multi F MAX (with or without 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 or without LGRED] systems only)
through the communication / connection (power) cable (indoor units and branch distribution units draw minimum power). See the Multi F /
Multi F MAX Outdoor Unit Installation Manual or the Multi F / Multi F MAX with LGRED 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.
• 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.
Do not over tighten the
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 45: JIS Screws.
Figure 46: Power Wiring
Conduit.
WIRING
35