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 176:PZCWRC1 LG Wired Remote Extension Cable.
A
Control Box
Terminal Block
Control Box Cover
1(L1)2(L2) 3
Power Wiring Connections
Lock nut
Conduit
mounting
plate
Conduit
Controller Options
Ceiling-concealed duct (high static) indoor units include an LG-supplied wired control-
ler (AKB72955816)
1
, but other optional LG-supplied wired controllers are available
(see Controls and Options overview on pages 9 to 12 in this manual’s Introduction
section). The wireless handheld controller (Model No. PQWRHQ0FDB) is also an
optional accessory with use of the wired controller.
1
Simple Mode Controllers for the ceiling-concealed duct (high static) indoor units are also referenced by Model No. PQRCVCL0QW.
Wired Controller
• Operation Display Panel: Displays operation conditions.
• Temperature Control Button: Sets desired temperature.
• Fan Speed Button: Sets desired fan speed.
• On / Off Button: Turns system operation on and off.
• Mode Selection Check Button: Selects the operation mode: Cooling, Heating, Auto,
Dry (Dehumidification), or Fan.
Each function will display on the LED for about three (3) seconds when the power is rst
cycled on.
TEMP
FA N
SPEED
OPER
MODE
Operation Display
Panel
Temperature Control
Button
Fan Speed Button
On/Off Button
Mode Selection
Check Button
Figure 174: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
Figure 175:AKB72955816
1
Wired Controller.
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 177: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.
DUCT (HIGH STATIC) | 125
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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