Midea MOB01-09HFN8-QRD6GW, Installation Manual

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CAUTION
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.
1. Make sure that the pipe is cut at a perfect 90°
angle. Refer to Fig. 7.2 for examples of bad cuts
Oblique Rough Warped
90°
Fig. 7.2
Step 2: Remove burrs.
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.
Pipe
Reamer
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. See Fig. 7.4
Flare nut
Copper pipe
Fig. 7.4
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 flare form.
Flare form
Pipe
Fig. 7.5
Refrigerant Piping
Connection
piping connection. They must be completely
removed.
Point down
Burrs can affect the
gas
-tight seal of refrigerant
Refrigerant Piping Connection
7
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18 
Step 3: Flare pipe ends
Proper flaring is essential to achieve an
Fig. 7.
3