Indoor Unit Electrical Connections - LG MULTI F Installation Manual

Ceiling cassette indoor unit

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Table Of Contents

Table of Contents

MULTI

MAX

Connecting the Power Wiring / Communication Cable

The general guidelines for connecting electrical and communication cables are similar for all ceiling cassette indoor units. The electrical

connections procedure includes a wiring diagram for the ceiling cassette indoor unit. It is required that power wiring / communications cable

installation be performed before decorative grille kit (required; sold separately) installation.

WARNING

• Verify that main power to the unit is completely off before proceeding with these steps as there is a risk of electrical shock, bodily injury, and /

or death.

• Follow all safety and warning information outlined at the beginning and throughout this manual. Failure to do so will cause electrical shock,

bodily injury, and / or death.

• Loose wiring will cause unit malfunction, or the terminal to overheat and catch fire, causing physical injury.

• Follow all safety and warning information outlined at the beginning and throughout this manual. Failure to do so will cause unit failure.

• Connect the communication / connection (power) cable to the indoor unit by matching the terminals on the outdoor unit control board. Verify

the color of the wires at the outdoor unit, along with the terminal numbers, match those for the indoor unit.

• Images are representative; actual appearance will vary.

• Refer to the circuit diagram on the indoor unit bottom cover.

• Ceiling cassette units require removing the control cover from the terminal block area. Control covers are attached with two (2) Phillips

screw head screws.

• Terminal screws will become loose during transport. Properly tighten the terminal connections during installation.

Connecting the Power Wiring and Communications Cable

1. If the decoration grille (required; sold separately) has been installed, remove it

for easier access to the control box. For information on decoration grille instal-

lation, see the Final Procedures section.

2. To access the terminal block, remove the metal control box cover by unscrew-

ing the two (2) screws that hold it in place. Set aside the control box cover and

screws for reattachment.

3. Insert the power wiring / communications cable from the outdoor unit or

branch distribution unit (Multi F MAX [with or without LGRED] systems only)

through its designated access holes in the sides of the indoor unit and control

box 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. If using a conduit, attach it to the conduit

mounting plate at the access hole, and secure with a lock nut.

4. Using a JIS screwdriver, connect each wire to its appropriate terminal on the

indoor unit control board. Verify that the color and terminal numbers from the

outdoor unit or branch distribution unit (Multi F MAX [with or without LGRED]

systems only) wiring match the color and terminal numbers on the indoor unit.

Refer to the wiring diagram on the indoor unit.

5. If installing a wired remote controller (optional, sold separately), insert the

controller wiring through its designated access hole opposite of the outdoor to

indoor cable. Refer to the wiring diagram on the indoor unit.

Due to our policy of continuous product innovation, some specifications may change without notification.