LG THERMA V AHNW16606B0, Руководство по установке, Страница: 48 / 65

Piping and Wiring for Outdoor Unit
48 Air-to-Water Heat Pump
Step 1. Cut the pipes and the cable.
• Use the accessory piping kit or the pipes
purchased locally.
• Measure the distance between the indoor unit
and the outdoor unit.
• Cut the pipes a little longer than the measured
distance.
Step 2. Burrs removal.
• Remove all burrs completely from cross sectional
cut of the pipe.
• Put the rear end of the pipe in the downward
direction to prevent drop of burrs from entering
the pipe.
Step 3. Insert flare nut.
• Take out flare nuts attached to the indoor unit and
the outdoor unit.
• Insert flare nuts into the burr-removed pipe.
• If flaring work is finished, it is impossible to insert
nuts into the pipe.
Step 4. Flaring work.
• Carry out flaring work using dedicated flaring tool
for R-410A refrigerant as shown below.
• Firmly hold the copper tube in a bar(or die) as per
the dimensions in the table above.
Step 5. Check
• Correspond the flared work to the right figure.
• If the flare seems improper, remove the flared
section and redo the entire flaring work.
Preparation for Piping
Preparation for piping is shown in the below 5 steps. As main cause of refrigerant leakage is due to
defects in flaring work, please carry out the appropriate flaring work as shown below:
Copper
tube
90°
Slanted Uneven Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
Bar
Copper pipe
"A"
<Wing nut type> <Clutch type>
Inclined
Inside is shiny without scratches
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
Pipe diameter
Inch (mm)
A inch (mm)
Wing nut type Clutch type
Ø 1/4 (Ø 6.35) 0.04~0.05 (1.1~1.3)
0~0.02
(0~0.5)
Ø 3/8 (Ø 9.52) 0.06~0.07 (1.5~1.7)
Ø 1/2 (Ø 12.7) 0.06~0.07 (1.6~1.8)
Ø 5/8 (Ø 15.88) 0.06~0.07 (1.6~1.8)
Ø 3/4 (Ø 19.05) 0.07~0.08 (1.9~2.1)