58
EN
REFRIGERANT PIPING CONNECTION
Be extra careful not to damage, dent, or deform the pipe
while cutting. This will drastically reduce the heating efficiency
of the unit.
DO NOT DEFORM PIPE
WHILE CUTTING
Burrs can affect the air-tight seal of refrigerant piping
connection. They must be completely removed.
Pipe
A
Flare form
Proper flaring is essential to achieving an airtight seal.
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.
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. 5.3
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.
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 2: REMOVE BURRS
STEP 3: FLARE PIPE ENDS
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”)
fig 5.2
fig 5.3
fig 5.4
fig 5.5
Flare nut
Copper pipe
Point down
Reamer
Pipe
