LG LA090HYV1 Engineering Manual page 42

inSTAllATion & lAyouT beST PrACTiCeS
refrigerant Piping System Layout
Single zone Art Cool Premier outdoor unit Connections
1. Remove the tubing cover from the unit by loosening the fastening screws (Figure 24).
2. Align the center of the refrigerant pipe and corresponding connection as shown in Figures 25 and 26.
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 Figures 25 and 26.
When tightening the flare nut with a torque wrench, ensure the direction for tightening
follows the arrow on the wrench.
Figure 25: Pipe Attachment.
Table 20: Torque Wrench Tightening.
outside Diameter (Inches)
1/4
3/8
1/2
5/8
3/4
42 | reFrIGerant deSIGn
Torque (Lbs.-ft)
13-18
24.6-30.4
39.8-47.7
45.6-59.3
71.6-87.5
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.
Figure 24: LSU090HYV1/LSU120HYV1 outdoor Unit
Connection Cover Removal.
Figure 26: LSU090HYV1/LSU120HYV1 outdoor Unit
Piping Connection.
Outdoor unit
Gas side piping
(Bigger diameter)
Tubing cover
Liquid side piping
(Smaller diameter )
Torque wrench