Piping Connection; Piping Connections - LG Art Cool LA090HSV4 Engineering Manual

inSTAllATion & lAyouT beST PrACTiCeS
refrigerant Piping System Layout
Single zone Art Cool Mirror outdoor unit Connections
1. Remove the tubing cover from the unit by loosening the fastening screws (Figures 26 and 27).
2. Align the center of the refrigerant pipe and corresponding connection as shown in Figures 29 and 30.
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.
When tightening the flare nut with a torque
wrench, ensure the direction for tightening
follows the arrow on the wrench.
Table 25: Torque Wrench Tightening.
outside Diameter
Torque (Lbs.-ft)
(Inches)
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 28: Pipe Attachment.
50 | reFrIGerant deSIGn
Figure 26: LSU090HSV4/LSU120HSV4
outdoor Unit Connection Cover Removal.
Figure 29: LSU090HSV4/LSU120HSV4 out-
door Unit Piping Connection.
Outdoor unit
Gas side piping
(Bigger diameter)
Due to our policy of continuous product innovation, some specifications may change without notification.
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Figure 27: LSU180HSV outdoor Unit Connec-
tion Cover Removal.
Tubing cover
Figure 30: LSU180HSV4 outdoor Unit

Piping Connection.

Liquid side piping
(Smaller diameter )
Torque wrench
Terminal Block
Terminal
Block Cover
Tubing
Cover
Outdoor unit
Gas side piping
(Bigger diameter)
Liquid side piping
(Smaller diameter)
Torque wrench