LG LC098HV4 Engineering Manual page 78

ELECTRICAL CONNECTIONS
Cassette Indoor Unit Power Wiring / Communications Cable Connections
1. To access the terminal block, open the control box cover.
2. Insert the power wiring / communications cable from the outdoor unit through the
sides of the indoor unit and control box. Pass the wiring through the designated
access holes to prevent damage. To prevent electromagnetic interference and
product malfunction, leave a space between the power wiring and communications
cable outside of the indoor unit. (For power wiring / communications cable between
the single zone outdoor unit and the indoor unit, use a four-conductor, stranded,
shielded or unshielded wire. If shielded, the wire must be grounded to the chassis at
the outdoor unit only.)
3. Connect each wire to its appropriate terminal on the indoor unit control board. Verify
that the color and terminal numbers from the outdoor unit wiring match the color and
terminal numbers on the indoor unit.
4. Neatly arrange power wiring / communications cable and secure with the appropriate
cable restraint. Do not apply force to the wiring connections when clamping.
5. Firmly reattach the control box cover.
cover. Make sure the cover firmly closes.
6. Fill in any gaps around the wiring access holes with sealant to prevent foreign parti-
cles from entering the indoor unit.
Using a Conduit
1. Remove the rubber stopper on the indoor unit.
Pass the power wiring / communications cable
through the conduit, the conduit mounting
plate, and to / through the control panel of the
indoor unit.
2. Connect the power wiring / communications
cable to the indoor unit terminal block.
3. Screw the conduit mounting plate to the
indoor unit.
4. Tighten the conduit and the conduit mounting
plate together.
Always use a circuit breaker or time delay fuse when connecting electrical wiring to the unit.
• Separately wire the high and low voltage lines. There is a risk of electric shock, physical
injury, or death.
• Use heat-proof electrical wire capable of withstanding temperatures up to 167°F to avoid
wiring malfunction and electrical shock, which may cause physical injury or death.
• Ensure you connect the wire firmly. Loose wiring may cause unit malfunction, the wires to
burnout or the terminal to overheat and catch fire. There is a risk of electric shock, physical
injury or death.
• Use outdoor and waterproof connection cable rated up to 300V for the connection between the indoor and outdoor unit to avoid electrical
shock, which may cause physical injury or death.
• Separately wire the high and low voltage lines to avoid damage to unit.
• Use heat-proof electrical wire capable of withstanding temperatures up to 167°F to avoid damage to unit.
• Always use a circuit breaker or time delay fuse when connecting electrical wiring to the unit.
• Connect the wire firmly. Loose wiring may cause unit malfunction, the wires to burnout or the terminal to overheat and catch fire. There is
a risk of equipment malfunction or property damage.
• Use outdoor and waterproof connection cable rated up to 300V for the connection between the indoor and outdoor unit to avoid damage
to the unit.
• Comply with local codes while running wire from the indoor unit to the outdoor unit.
• Do not allow wire to touch refrigerant piping, the compressor or any moving parts since it can lead to mechanical failure.
78 | INTRODUCTION
Do not catch the wiring in the electric box
Figure 71: Cassette Indoor Unit Terminal
Block Location / Using a Conduit.
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 70: Power Wiring and Communications
Cable Connection Access.
Control Box Cover
Lock Nut
Conduit
Conduit
Mounting
Plate
Figure 69: Circuit Breaker/Time Delay Fuse
Connection.
Main Power Source
Air
Conditioner
Power Wiring
Wired
Controller
Cabl e
Control Box
Cover Screws
Wiring / Cable Connections
Circuit Breaker
Use a circuit breaker
or time delay fuse