Flare nut
Copper pipe
Pipe
Flare form
Radius
≥
10 cm (4 in)
Indoor unit tubing
Flare nut
Pipe
Page 28
4. Remove PVC tape from ends of pipe when ready to
perform flaring work.
5.
Clamp flare form on the end of the pipe. The end of
the pipe must extend beyond the edge of the flare
form in accordance with the dimensions shown in the
table below.
PIPING EXTENSION BEYOND FLARE
FORM
Outer Diameter of
Pipe (mm)
A (mm)
Min.
Max.
Ø 6,35 (Ø 0,25")
0,7 (0,0275")
1,3 (0,05")
Ø 9,52 (Ø 0,375")
1,0 (0,04")
1,6 (0,063")
Ø 12,7 (Ø 0,5")
1,0 (0,04")
1,8 (0,07")
Ø 16 (Ø 0,63")
2,0 (0,078")
2,2 (0,086")
Ø19 (Ø 0,75")
2,0 (0,078")
2,4 (0,094")
6.
Place flaring tool onto the form.
7.
Turn the handle of the flaring tool clockwise until the
pipe is fully flared.
8.
Remove the flaring tool and flare form, then inspect
the end of the pipe for cracks and even flaring.
Step 4: Connect pipes
When connecting refrigerant pipes, be careful not to use
excessive torque or to deform the piping in any way. You
should first connect the low-pressure pipe, then the high-
pressure pipe.
MINIMUM BEND RADIUS
When bending connective refrigerant piping, the minimum
bending radius is 10cm.
Instructions for Connecting Piping to
Indoor Unit
1. Align the center of the two pipes that you will connect.
2.
Tighten the flare nut as tightly as possible by hand.
1. Using a spanner, grip the nut on the unit tubing.
1.
While firmly gripping the nut on the unit tubing, use
a torque wrench to tighten the flare nut according to
the torque values in the Torque Requirements table
below. Loosen the flaring nut slightly, then tighten
again.
