LG LS091HSV3 Installation Manual page 42

REFRIGERANT PIPING CONNECTIONS
Outdoor Unit Connections
Single Zone Wall Mount Outdoor Unit Connections (090HEV, 090HEV1,
120HEV, 120HEV1, 240HEV, 240HEV1, 090HXV, 120HXV)
1. Remove the tubing cover by loosening the fastening screws (Figures 57 to 59).
2. Align the center of the refrigerant pipe and corresponding connection as shown in Figure 60.
3. Refer to Figures 61 to 63 for correct liquid and gas pipe attachment onto outdoor unit.
4. 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.
5. Finish tightening the flare nut with a torque wrench until the wrench clicks. Follow the guidelines as outlined in Table 31 for the amount of
torque to use.
Figure 57: LSU90-120HEV/HEV1, LSU90-
120HXV Outdoor Unit Connection Cover Removal
1(L1) 2(L2)
L
Terminal Block
Piping connection
Figure 60: Pipe Attachment.
Figure 61: LSU90-120HEV/HEV1, LSU90-
120HXV Outdoor Unit Piping Connection.
Outdoor unit
Torque wrench
42
Figure 58: LSU180HEV/HEV1 Outdoor Unit
Connection Cover Removal
1(L1) 2(L2) 3 90-120HEV1
N 1(L) 2(N) 3 90-120HXV
Cord clamp
Power
Power
connecting
cord
cable
Conduit cover
Tubing cover
Outdoor Unit
• Do not thread liquid or gas
piping through bracket used to
hold main power cables.
• When tightening the flare nut
with torque wrench, ensure the
direction for tightening follows
the arrow on the wrench.
Figure 62: LSU180HEV/HEV1 Outdoor Unit
Piping Connection.
Gas side piping
(Bigger diameter)
Liquid side piping
(Smaller diameter)
Bracket for Main
Power Cables
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.
Figure 59: LSU240HEV/HEV1 Outdoor Unit
Connection Cover Removal
Terminal Block
Bracket for
Main Power Cables
Tubing
Cover
Screw
Table 31: Torque Wrench Tightening
Outside Diameter (Inches)
1/4
3/8
1/2
5/8
3/4
Figure 63: LSU240HEV/HEV1 Outdoor Unit
Piping Connection.
Gas Piping
(Larger diameter)
Liquid Piping
(Smaller diameter)
Torque wrench
Terminal Block
Terminal
Block Cover
Tubing
Cover
Torque (Lbs.-ft)
13-18
24.6-30.4
39.8-47.7
45.6-59.3
71.6-87.5
Outdoor unit
Gas side piping
(Bigger diameter)
Liquid side piping
(Smaller diameter)
Torque wrench