LG LS303HLV3 - Outdoor Unit Piping Connections

34
Single Zone Extended Piping Wall Mounted Installation Manual
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REFRIGERANT PIPING CONNECTIONS
Outdoor Unit Connections
Outdoor Unit Piping Connections
1. The HLV3 outdoor unit piping connections are on the side of the
unit.
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for tightening follows the arrow on the wrench.
Table 18: 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 35: Outdoor Unit Piping
Connections (HLV3).
Figure 36: Removing the
Flare Nuts on the Outdoor
Unit.
Piping
Connections
Side Panel
Figure 37: Connecting the
Flared Field Piping to the Out-
door Unit Connection.
The HLV3 outdoor unit has a side panel that covers its electrical compo-
nents. 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.