Power Wiring/Communication Cable Connections; To Install A Ring Or Fork Terminal; To Connect The Wiring To The Terminals; Proper And Improper Power Wiring Connections - LG MULTI F Series Installation Manual
Multi-zone heat pump systems with lgred 1.5 to 3.5 tons
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Also See for MULTI F Series:
- Engineering manual (392 pages) ,
- Installation manual (104 pages) ,
- Owner's manual (234 pages)
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Best practice dictates using solderless ring or fork terminals at all power wiring and com-
munication cable terminations. Use copper bearing ring or fork terminals;
galvanized or nickel plate over steel. Use appropriate crimping tool to attach the ring or fork
terminals at all power wiring and control cable terminations.
To Install a Ring or Fork Terminal:
1. Trim the wiring with wire cutters or pliers, then strip the insulation to expose the strand
wiring to about 3/8 inches.
2. Using a ring terminal fastener or pliers, securely clamp a ring terminal to each stripped
wire end.
To Connect the Wiring to the Terminals:
1. Remove the JIS terminal screws from the (outdoor unit, branch distribution unit, or indoor
unit) terminal plate with a JIS screwdriver. (See information about LG terminal connec-
tions on the next page.)
2. Position the ring terminal around the terminal, place the terminal screw in the ring, and
tighten to the terminal plate using a JIS screwdriver.
• Firmly attach the wire; secure in a way to prevent external forces from being imparted to
the terminal block.
• Use an appropriately sized JIS screwdriver for tightening the terminals.
•
Do not over tighten the connections; over tightening 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 74: Proper and Improper Power Wiring Connections.
Terminate multiple power wires of
the same gauge to both sides.
WARNING
•
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
removing the electrical panels while servicing, and to prevent external forces from damaging the terminal block.
Do not terminate two wires on
one side.
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
Figure 71: Close up of a Typical Ring Terminal.
Ring Terminal
do not use
Figure 72: Adding a Ring Terminal to the
Wiring.
Figure 73: Tightening the Ring Terminal to the
Terminal Plate.
Loosening the
terminal block
screw
Connecting cable
:Copper Wire
Do not terminate different gauge
wires to a terminal block.
Wiring / Cable
Ring
Terminal
Connecting Cable
Fastening the
wiring tightly
59
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