LMCN078HV Engineering Manual

MULTI
F
MAX
MULTI
F
Installation and Best Layout Practices
DUCT (HIGH STATIC) INDOOR UNITS
Using a Conduit
1. Remove the rubber stopper on the indoor unit. Pass the power wiring / communica-
tions 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.
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).
Figure 172:PZCWRC1 LG Wired Remote Extension Cable.
Controller Options
Ceiling-concealed duct (high static) indoor units can be used with many LG-supplied wired controllers (sold separately). The wireless hand-
held controller (Model No. PQWRHQ0FDB) is also an optional accessory with use of the wired controller.
Figure 171:Exterior View of Conduit Installation.
Indoor Unit Terminal Block
1(L1 )2(L2)
GND
3
Outdoor Unit Terminal Block or
Branch Distribution Unit Terminal Block
(Multi F MAX Systems Only)
GND
GRN /
YLW
BR
BL
RD
3 or S
CN-REMO
YL
RD BK
Comm.
12V
Power
Ground
Wired Controller Connections
Controllers can connect to the indoor unit in one of two different
ways.
1. LG Wired Remote Extension Cable with Molex plug (PZCWRC1;
sold separately) that connects to the CN-REMO terminal on the
indoor unit PCB.
2. Field-supplied controller cable that connects to the indoor unit
terminal block (must be at least UL2547 or UL1007, 22 AWG,
two-core, one-shield core, at least FT-6 rated if local electric and
building codes require plenum cable usage).
Verify the connectors are properly inserted.
C/BOX Cable (Plug type)
Extension cable
To Indoor Unit
CN-REMO
Terminal
TEMP
FAN
SPEED
OPER
MODE
Figure 173:Wired Controller Connections on the Indoor Unit Terminal
Block.
When using eld-supplied controller cable, make sure to connect the yellow to
yellow (communications wire), red to red (12V power wire), and black to black
(ground wire) terminals from the remote controller to the indoor unit terminal
blocks.
Indoor power cable
Remote controller cable and
transmission cable between
the indoor unit and the
outdoor unit
Conduit Hole
GN/YL
Power Supply
High Voltage
(208/230 V)
Wired Remote
Controller
DUCT (HIGH STATIC) | 131
Ceiling-Concealed Duct (High Static)
Due to our policy of continuous product innovation, some specications may change without notication.
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