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Power Wiring / Communication Cable Connections
Best practice dictates using solderless ring or fork terminals at all power wiring and communication cable terminations. Use copper bearing
ring or fork terminals;
do not use galvanized or nickle plate over steel. Use appropriate crimping tool to attach the ring or fork terminals
at all power wiring and control cable terminations. To install:
• Firmly attach the wire; secure in a way to prevent external forces from being imparted to the
terminal block.
• Use an appropriately sized screwdriver for tightening the terminals.
•
Do not overtighten the connections; overtightening will damage the terminals.
If ring terminals or fork terminals are not available, then:
•
Do not terminate different gauge wires to the power terminal block. (Slack in the wiring
will generate heat.)
• When terminating wires of the same thickness, follow the instructions demonstrated in the figures below.
Figure 31: Proper and Improper Power Wiring Connections.
Terminate multiple power wires of
the same gauge to both sides.
•
Never apply line voltage power to the communications cable terminal block. If contact is made, the PCBs will be damaged.
• Always include some allowance in the wiring length when terminating. Firmly attach the wiring or cable, but provide some slack to facilitate
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 — overtightening 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."
•
wired in relation to the outdoor unit.
•
Do not include splices or wire nuts in the communication cable.
Power Wiring / Communication Cable / Terminal Connections
Do not terminate two wires on
one side.
Do not overtighten 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 Life's Good" is a registered trademark of LG Corp.
Figure 30: Close up of a Typical Ring Terminal.
Ring Terminal
:Copper Wire
Do not terminate different gauge
wires to a terminal block.
Figure 32: JIS Screws.
WIRING
Wiring / Cable
49
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