Outdoor Unit Connections - LG LV181HV4 Installation Manual

Outdoor Unit Connections

1. Remove the ODU front panel by loosening the fastening screws.
2. Align the center of the refrigerant piping and corresponding
connection as shown.
3. Refer to the figures at right for liquid and gas piping attachments
onto the outdoor unit.
4. Place a couple of drops of PVE refrigerant oil on outside of the
flare before assembling.
Tighten the flare nut initially by hand.
5. Finish tightening the flare nut with a torque wrench until the
wrench clicks. Follow torque guidelines in the table below. See
figures for correct connection points.
When tightening the flare nut with a torque wrench, ensure the direction
for tightening follows the arrow on the wrench.
Figure 45: Pipe Attachment.
Table 15: Torque Wrench Tightening.
Pipe Size (in. OD) Outside Diameter (mm)
1/4
3/8
1/2
5/8
3/4
REFRIGERANT PIPING CONNECTIONS
Do not add any contaminants.
Torque (lbs-ft)
6.35 13.0 - 18.0
9.52 24.6 - 30.4
12.7 39.8 - 47.7
15.88 45.4 - 59.3
19.05 71.5 - 87.5
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.
Outdoor Unit Connections
Figure 43: LUU369HV, LUU428HV, LUU488HV Outdoor Unit Piping
Connection
Figure 44: LUU189HV, LUU249HV Outdoor Unit Piping Connection
Liquid Vapor
Piping can be installed
in one of four different
layouts.
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