LG THERMA V AHNW16606B0, Installation Manual, Page: 49 / 65

Installation Manual 49
ENGLISH
Piping and Wiring for Outdoor Unit
Connecting Pipe to Indoor Unit
Connecting pipe to the indoor unit is shown in the below two steps. Read the following directions
carefully.
Connecting Pipe to Outdoor Unit
Connecting pipe to the outdoor unit is shown in the below five steps including PCB setting.
Step 1. Determine direction of pipes.
• The pipes can be interconnected in four directions
• The directions are indicated in the below figure.
• The pipes cannot be connected in the downward direction.
Step 1. Pre-tightening.
• Align the center of the pipes and sufficiently
tighten the flare nut by hand.
Step 2. Tightening.
• Tighten the flare nut with a wrench.
• Tighten the torque as per the values in the
table:
Torque wrench
Indoor unit tubing
Open-end wrench (fixed)
Connection pipe
Flare nut
Indoor unit tubing Flare nut Pipings
mm inch kgf·m
6.35 1/4 1.8 ~ 2.5
9.52 3/8 3.4 ~ 4.2
12.7 1/2 5.5 ~ 6.6
15.88 5/8 6.6 ~ 8.2
19.05 3/4 9.9 ~ 12.1
Outside diameter Torque
Forward
Sideways
Backward
Forward
Sideways
Backward