Indoor Unit Electrical Connections Procedure - LG LMCN077HV Installation Manual
Multi f;
multi f max
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Also See for LMCN077HV:
- Service manual (113 pages) ,
- Installation manual (61 pages) ,
- Owner's manual (60 pages)
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F
MULTI
F
MULTI
MAX
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 recommended that power wiring / communications
cable installation be performed before decorative grille kit (required; sold separately) installation.
• Be sure that main power to the unit is completely off before beginning this procedure. Electric shock can cause severe physical injury or
death.
• Follow all safety and warning information outlined at the beginning and throughout this manual. Failure to do so may cause bodily injury or
death.
• Loose wiring may cause unit malfunction, or the terminal to overheat and catch fire, causing physical injury.
Note:
• Follow all safety and warning information outlined at the beginning and throughout this manual. Failure to do so, may cause unit failure.
• Ceiling cassette units require removing the control cover from the terminal block area. Control covers are attached with a phillips screw
head.
• Connect the electrical cable to the indoor unit by connecting the wires to the terminals on the control board individually according to the
outdoor unit connection. Be sure that the color of the wires at the outdoor unit / BD unit (Multi F MAX systems only) along with the terminal
numbers are the same as those for the indoor unit. If wiring is not performed correctly, the system will malfunction.
• Terminal screws may become loose during transport. Properly tighten the terminal connections during installation.
Connecting the Power Wiring and Communications Cable
1. To access the terminal block, unscrew the control box cover and
set it aside.
2. Insert the power wiring / communications cable from the out-
door unit or branch distribution unit (Multi F MAX systems only)
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.
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 or branch distribution unit (Multi F MAX systems
only) 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. When clamping, do not apply
force to the wiring connections.
5. Firmly reattach the control box cover, do not catch the wiring in
the electric box cover and make sure the cover firmly closes.
6. Fill in any gaps around the wiring access holes with sealant to
prevent foreign particles from entering the indoor unit.
Indoor Unit Power Wiring / Communications Cable Installation
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 WIRING
Figure 52: Power Wiring and Communications Cable Connection
Access.
Control Box Cover
Wiring / Cable Connections
Power Wiring
Wired
Controller
Cabl e
Control Box
Cover Screws
41
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