LG LH247HV Engineering Manual page 63

Connecting the Power Wiring / Communications Cable
Best practice dictates using ring or spade terminals to terminate power wiring at the power
terminal block. If ring terminals or spade clips are not available, then:
• Do not terminate different gauge wires to the power terminal block. (Slack in the wiring may
generate heat.)
• When terminating wires of the same thickness, follow the instructions demonstrated in the
figures below.
• Firmly attach the wire; secure in a way to prevent external forces from being imparted on the
terminal block.
• Use an appropriately sized screwdriver for tightening the terminals.
• Do not overtighten the connections; over-tightening may damage the terminals.
Figure 59: Proper and Improper Power Wiring Connections.
Terminate multiple power wires of
the same gauge to both sides.
If power wires are not properly terminated and / or firmly attached, there is a risk of fire, electric shock, and / or physical injury or death.
• Never apply line voltage power to the communications cable terminal block. If contact is made, the PCBs may be damaged.
• Always include some allowance in the wiring length when terminating. Provide some slack to facilitate removing the electrical panels
while servicing.
Figure 60: General Power / Communications System Schematic.
Power Supply
Circuit Breaker
Ground Wire
Do not terminate two wires on
one side.
Outdoor unit
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 ConneCtionS
Figure 58: Close up of a Typical Ring Terminal.
Ring Terminal
Do not terminate different gauge
• Secure the separate wires in the control
• Secure wiring with accessory clamps so
• Use a conduit for the cable
• Outside the unit, make sure the commu-
Wiring connections
Power Wiring
:Copper Wire
wires to a terminal block.
box panel using zip ties.
that it does not touch piping.
nications cable and the power wiring are
shielded separately, otherwise, the out-
door unit operation may be affected by
electrical noise and will malfunction or
fail.
duct (HIgH StatIc) | 63