LG Electronics LUU360HHV User Manual

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36 | PRODUCT DATA

Single-Zone LGRED° Four-Way Ceiling-Cassette System Engineering Manual

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ELECTRICAL CONNECTIONS

Figure 29: General Four-Way Ceiling Cassette System Power / Communications System Schematic (Appearances May Vary).

Controller Options

Single Zone LGRED Four-Way Ceiling Cassette systems include a wireless handheld remote controller

(18,000 Btu/h models Model No. PQWRHQ0FDB; Part No. AKB73757604 for 18,000 Btu/h cassette

indoor units; Part No. AKB75735404 for 24,000 to 48,000 Btu/h cassette indoor units). Optional

LG-suppled wired controllers are available. See “Functions, Controls, Options”, or contact an LG

representative for more information.

Wireless Handheld Remote Controller features:

• Display Panel: Displays operation conditions.

• On / Off Buttons: Turns system operation on and off.

• Mode Button: Selects the operation mode: Cooling, Heating, Auto, Dry (Dehumidification), or Fan.

• Temp Up / Down Buttons: Adjusts the desired room temperature in the different modes.

• Fan Speed Button: Sets desired fan speed.

• Reset: Initializes the handheld remote control settings.

Wired Controller Connections

Optional controllers (see “Functions, Controls, Options”, or contact an LG representative for more

information) can connect to the Four-Way Ceiling Cassette 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, and at least FT-6 rated if local electric and building codes require plenum cable

usage). Communication cable from indoor unit to remote controller(s) is to be 22 AWG, 3-conductor,

twisted, stranded, unshielded. Wiring must comply with all applicable local and national codes.

• Use a conduit for the communications cable / power wiring from the outdoor unit to the indoor units.

• Make sure the communications cable / power wiring from the outdoor units to the indoor units, and the power wiring to the outdoor unit are

separate, otherwise, the outdoor unit operation will be affected by electrical noise and will malfunction or fail.

Figure 30: PQWRHQ0FDB

(AKB73757604) Wireless Hand-

held Remote Controller for 18,000

Btu/h Cassette Indoor Units.

Power Supply

Main Switch

Circuit Breaker

Fuse

Power Wiring

(Including Ground)

Outdoor Unit

1(L1)

L(L1)

2(L2)

N(L2)

Terminal Block Outdoor

Communication

Cable

Terminal Block Indoor

Power

Wiring

Indoor Unit

1(L1)

L(L1)

2(L2)

N(L2)

1(L1) or

L(L1)

2(L2) or

N(L2)

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LG Electronics LUU360HHV LG Air Conditioner Cooling Area,

User Manual - Page 36