Connecting Pipe To Indoor Unit; Connecting Pipe To Outdoor Unit - LG THERMA V Air-to-Water Heat Pump Installation Manual

Connecting Pipe to Indoor Unit

Connecting pipe to the indoor unit is two steps. Read following directions carefully.
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.
• Tightening torque is as following.
Outside diameter
mm
6.35
9.52
12.7
15.88
19.05

Connecting Pipe to Outdoor Unit

(Product Heating Capacity : 9kW(U4 Chassis),12kW,14kW,16kW)
Connecting pipe to the outdoor unit is five steps including PCB setting.
Step 1. Determine direction of pipes.
• The pipes can be connectable in four directions
• The directions are expressed in below figure.
Backward
Forward
Step 2. Determine direction of pipes : in
case of downward
Torque
inch kgf·m
1/4 1.8 ~ 2.5
3/8 3.4 ~ 4.2
1/2 5.5 ~ 6.6
5/8 6.6 ~ 8.2
3/4 9.9 ~ 12.1
Sideways
Piping and Wiring for Outdoor Unit
Indoor unit tubing
Torque wrench
Indoor unit tubing
Backward
Sideways
Forward
Not Available
Flare nut Pipings
Open-end wrench (fixed)
Flare nut
Connection pipe
Installation Manual 43