MrCool Advantage Series - Piping Preparation and Flaring

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REFRIGERANT PIPING CONNECTION
6
6.2 Piping Connection Instructions
Step 1: Cut Pipes
When preparing refrigerant pipes, take extra care
to cut and are them properly. This will ensure
ecient operation and minimize the need for future
maintenance.
1. Measure the distance between the indoor and
outdoor units.
2. Using a pipe cutter, cut the pipe a little longer than
the measured distance.
3. Make sure that the pipe is cut at a perfect 90° angle.
Refer to Fig. 6.1 for bad cut examples.
WARNING
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eciencyoftheunit.
Step 2: Remove Burrs
Burrs can aect 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 aring 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 are nuts on both ends of pipe. Make sure
they are facing in the right direction, because you
cannot put them on or change their direction after
aring. See Fig. 6.3.
4. Remove PVC tape from ends of pipe when ready to
perform aring work.
5. Clamp are form on the end of the pipe. The end of
the pipe must extend beyond the edge of the are
form in accordance with the dimensions shown in
the table below.
Piping Extension Beyond Flare Form
Outer Diameter
ofPipe(in/mm)
A(in/mm)
Min. Max.
Ø 0.25" (Ø 6.35) 0.0275" (0.7) 0.05" (1.3)
Ø 0.375" (Ø 9.52) 0.04" (1.0) 0.063" (1.6)
Ø 0.5" (Ø 12.7) 0.04" (1.0) 0.07" (1.8)
Ø 0.63" (Ø 16) 0.078" (2.0) 0.086" (2.2)
Ø 0.75" (Ø 19) 0.078" (2.0) 0.094" (2.4)