LG Electronics LSU120HXV2 User Manual

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Single Zone Mega and Mega 115V Wall Mounted Installation Manual

Due to our policy of continuous product innovation, some specifications may change without notification.

REFRIGERANT PIPING CONNECTIONS

Accessing and Positioning the Indoor Unit Piping / Connections (HEV2 and HXV2), continued.

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1. Prop indoor unit away from wall bracket.

2. Guide communication / connection (power) cable insulation into the conduit.

• Check local, state, and federal codes when choosing a conduit size.

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3. Attach conduit using the liquidtight 3/4 inch elbow connector.

4. Reassemble the indoor unit properly onto the wall bracket.

5. If conduit is not used, see pages in this section for refrigerant piping, condensate drain, power wiring / communica-

tion cable bundling information.

6. To protect the piping, condensate drain, and conduit from the elements, add a lineset cover from the indoor access

hole to the outdoor unit.

Indoor Unit Piping Flare Nut Field-

Installed

Piping

Pipe Size (in. O.D.) Outside Diameter (mm) Torque (ft-lbs.)

1/4 6.35 13.0 - 18.0

3/8 9.52 24.6 - 30.4

1/2 12.7 39.8 - 47.7

5/8 15.88 45.4 - 59.3

3/4 19.05 71.5 - 87.5

Table 19: Torque Wrench Tightening.

Figure 52: Piping Installation When Piping is on the Right Side.

Piping Installation When Piping is on the Right Side (HEV2

and HXV2)

See the Electrical System Installation section for information on how to connect

the communication / connection (power) wiring from the outdoor unit.

1. Align the center of the refrigerant piping and corresponding connection

as shown.

2. Place a couple of drops of refrigerant oil on outside of the flare before

assembling.

Do not add any contaminants. Tighten the flare nut

initially by hand.

3. Finish tightening the flare nut with a torque wrench until the wrench

clicks. Follow torque guidelines in the table below.

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tightening follows the arrow on the wrench.

4. Bundle the refrigerant piping, drain hose, and communication / con-

nection (power) cable together. Ensure that the drain hose is located

at the bottom of the bundle.

• If using a conduit for the power wiring / communications cable, see

below.

Positioning the drain hose at the top of the bundle can cause condensate to

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Figure 53: Indoor Unit Connection.

Figure 54: Liquidtight 3/4 Inch Elbow Connector

Attached to Flexible Conduit.

Indoor Unit Connections

Right Side Piping

Piping

Connection

Cable

Tape

Drain Hose

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LG LSU120HXV2 Air Condition

User Manual - Page 40