Flare nut
Copper pipe
Pipe
Flare form
Radius
≥
10 cm (4 in)
Indoor unit tubing
Flare nut
Pipe
Pipe
Reamer
Point down
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Step 2: Remove burrs
Burrs can affect the air-tight seal of refrigerant piping
connection. They must be completely removed.
1. Hold the pipe at a downward angle to prevent
burrs from falling into the pipe.
2. Using a reamer or deburring tool, remove all burrs
from the cut section of the pipe.
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")
Step 3: Flare pipe ends
Proper flaring is essential to achieve an airtight seal.
1. After removing burrs from cut pipe, seal the ends
with PVC tape to prevent foreign materials from
entering the pipe.
2. Sheath the pipe with insulating material.
3. Place flare nuts on both ends of pipe. Make sure
they are facing in the right direction, because you
can't put them on or change their direction after
flaring.
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.
Instructions for Connecting Piping to
Indoor Unit
1. Align the center of the two pipes that you will connect.
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.
