Multi F Outdoor Condenser Installation Manual

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MULTI F / MULTI F MAX Outdoor Unit 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.
ELECTRICAL
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.
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ARE ground terminals.
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• Always create a wiring diagram that contains the exact sequence in which all the indoor units and branch distribution units (Multi F MAX
systems only) are wired in relation to the outdoor unit.
•
Do not include splices or wire nuts in the communication cable.
Figure 73: JIS Screws.
• 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.
• Multi F and Multi F MAX 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 systems only) through the communication / con-
nection (power) cable.
• Power supply to the outdoor unit must be selected based on NEC and local codes. Maxi-
mum allowable voltage fluctuation ±10% or nameplate rated value.
• Power wiring to the outdoor unit(s) must be solid or stranded, and must comply with all
local and national electrical codes.
• Properly ground the outdoor unit and indoor unit 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.
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Air
Conditioner
Main Power Source
Circuit Breaker
Use a circuit breaker
or time delay fuse
Figure 74: Circuit BreakerTable 32: Circuit Breaker / Fuse Size.
7/16" ± 1/8"
13/16
"
GN/YL
Power Wiring, Ground
to Outdoor Unit
Figure 75: Multi F / Multi F MAX Outdoor Unit
Power Wiring.
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Outdoor Unit Model Power Source
Fuse or Breaker
Capacity
LMU18CHV, LMU24CHV 1Ø, 208-230V 20A
LMU30CHV, LMU36CHV 1Ø, 208-230V 25A
LMU480HV, LMU540HV 1Ø,208-230V 40A
LMU600HV 1Ø, 208-230V 45A