Remove Burrs; Flare Pipe Ends - Midea Ultimate Comfort Series Installation Manual

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.
Hold the pipe at a downward angle to prevent
1.
burrs from falling into the pipe.
Using a reamer or deburring tool, remove all
2.
burrs from the cut section of the pipe.
Point down
Fig. 5.2
Step 3: Flare pipe ends
Proper flaring is essential to achieve an airtight
seal.
After removing burrs from cut pipe, seal
1.
the ends with PVC tape to prevent foreign
materials from entering the pipe.
Sheath the pipe with insulating material.
2.
Place flare nuts on both ends of pipe. Make
3.
sure they are facing in the right direction,
because you can't put them on or change
their direction after flaring. See Fig. 5.3
 Page 26 
Pipe
Reamer
.
Flare nut
Copper pipe
Fig. 5.3
Remove PVC tape from ends of pipe when
4.
ready to perform flaring work.
Clamp flare form on the end of the pipe.
5.
The end of the pipe must extend beyond the
edge of the flare form in accordance with the
dimensions shown in the table below.
Fig. 5.4
PIPING EXTENSION BEYOND FLARE FORM
Outer Diameter of
Pipe (mm)
1/4
3/8
1/2
5/8
3/4
Flare form
Fig. 5.5
A (mm)
Min. Max.
0.7mm 1.3mm
1.0mm 1.6mm
1.0mm 1.8mm
2.0mm 2.2mm
2.0mm 2.4mm
A
Pipe