LG MULTI F Engineering Manual page 149

F
MULTI
FOUR-WAY CEILING CASSETTE INDOOR UNITS
F
MULTI MAX
Connecting the Power Wiring and
Communications Cable
1. To access the terminal block, open the control box cover.
2. Insert the power wiring / communications cable from the outdoor 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 dam-
age. 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.
Figure 208:Simplified View of Indoor Unit to Outdoor Unit / Branch
Distribution Unit Terminal Connections.
GND
Indoor Unit Terminal Block
1(L1) 2(L2) 3(C)
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. Tighten the conduit and the conduit mounting plate together.
3. Connect the power wiring / communications cable to the indoor unit terminal block.
4. Screw the conduit mounting plate to the indoor unit.
If the distance between the outdoor unit and indoor unit is greater than 131 feet, connect the power
wiring and communications cable separately (i.e., a conduit cannot be used).
Outdoor Unit Terminal Block or
Branch Distribution Unit Terminal Block
(Multi F MAX Systems Only)
3 or S
GND
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.
Installation and Best Layout Practices
Figure 207:Power Wiring and Communications
Cable Connection Access.
Control Box Cover
Figure 209:Using a Conduit.
Power Wiring
Wired
Controller
Cabl e
Control Box
Cover Screws
Wiring / Cable Connections
Rubber Stopper
Cable
Conduit Bracket
Screws
Conduit
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Ceiling cassette 4-way
CEILING-CASSETTE | 149