Art Cool Premier Installation Manual
35
Refrigerant Piping Connections
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.
REFRIGERANT PIPING CONNECTIONS
Outdoor Unit Connections
Outdoor Unit Piping Connections
1. The outdoor unit piping connections are on the side of the unit.
:KHQWLJKWHQLQJWKHÀDUHQXWZLWKDWRUTXHZUHQFKHQVXUHWKHGLUHFWLRQ
for tightening follows the arrow on the wrench.
Table 16: Torque Wrench Tightening.
Pipe Size (in. OD) Outside Diameter (mm) Torque (lbs-ft)
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
Figure 33: LAU090HYV3 /
LAU120HYV3 Outdoor Unit Cover
Removal.
Figure 34: LAU150HYV3
/ LAU180HYV3 /
LAU240HYV3 Outdoor Unit
Piping Connections.
Piping
Connections
Side Panel
Figure 35: Removing the Flare
Nuts on the Outdoor Unit.
• LAU090HYV3 / LAU120HYV3 outdoor units have a side cover that
protects the piping connections and the electrical components. This
side cover must be removed for piping and electrical connections.
• LAU150HYV3 / LAU180HYV3 / LAU240HYV3 outdoor units have
a side panel that covers its electrical components. The side panel
does not have to be removed for piping installation, however, it will
need to be removed for power wiring / communication (connection)
cable installation.
2. Remove the flare nuts attached to the outdoor unit valves.
3. Thread the flare nuts onto the field-supplied piping.
4. Flare the end of the piping following the information in the
“General Refrigerant Piping System” section and industry best
practices.
5. Place a couple of drops of PVE refrigerant oil on outside of the
flare before assembling.
Do not add any contaminants.
6. Align the center of the refrigerant piping to the corresponding
outdoor unit connection.
7. Connect the field piping to the outdoor unit connection. Tighten
the flare nut initially by hand.
8. Finish tightening the flare nut with a torque wrench until the
wrench clicks. Follow torque guidelines in the table.
Figure 36: Connecting the Flared
Field Piping to the Outdoor Unit
Connection.