48 | reFrIGerant deSIGn
Single Zone High Efficiency W
all Mount Engineering Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG ” is a registered trademark of LG Corp.
inSTAllATion & lAyoUT beST PrAcTiceS
Single zone Wall Mount outdoor Unit connections
1. Remove the tubing cover by loosening the fastening screws. See
Figure 26.
2. Align the center of the refrigerant pipe and corresponding
connection as shown in Figure 27.
3. Place a couple of drops of refrigerant oil on the opening rim of the
flare before assembling. Ensure you do not add any
contaminants. Tighten the flare nut initially by hand.
4. Finish tightening the flare nut with a torque wrench until the
wrench clicks. See Figure 28.
Figure 26: outdoor Unit Connection Cover Removal.
Tubing Cover
When tightening the flare nut with a torque wrench, ensure the direc-
tion for tightening follows the arrow on the wrench.
Table 23: Torque Wrench Tightening.
outside Diameter (inches)
Torque (lbs-ft)
1/4
13-18
3/8
24.6-30.4
1/2
39.8-47.7
5/8
45.6-59.3
3/4
71.6-87.5
Figure 27: Pipe Attachment.
Figure 28: Heat Pump outdoor Unit Piping Connection.
Outdoor Unit
Vapor Side Piping
(larger diameter)
Liquid Side Piping
(smaller diameter)
Torque Wrench
refrigerant Piping System Layout
