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DO NOT DEFORM PIPE WHILE CUTTING
Be extra careful not to damage, dent, or deform the pipe while cutting. This will drastically
reduce the heating efficiency of the unit.
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.
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.
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”)
Ø12.7 ( Ø 0.5”) 1.0 (0.04”) 1.8 (0.07”)
Ø 16 ( Ø 0.63”) 2.0 (0.078”) 2.2 (0.086”)
Ø 19 (Ø 0.75”) 2.0 (0.078”) 2.4 (0.094”)
Pipe
Point down
Reamer
Flare nut
Copper pipe
Flare form
Pipe
4
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