HTW IX21D5 Serie Manuel D'installation page 76

INSTALLATION MANUAL
6. REFRIGERANT PIPING CONNECTION
DO NOT DEFORM THE 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. 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.
PIPING EXTENSION BEYOND FLARE FORM
Outer Diameter of
Pipe (mm)
Ø 6,35 (Ø 0,25")
Ø 9,52 (Ø 0,375")
Ø 12,7 (Ø 0,5")
Ø 16 (Ø 0,63")
Ø 19 (Ø 0,75")
74

Min.
0,7 (0,0275")
1,0 (0,04")
1,0 (0,04")
2,0 (0,078")
2,0 (0,078")
Flare form
Pipe
SPLIT 1X1
Pipe
Point down
Flare nut
Copper
pipe
Fig. 5.4
A (mm)
Max.
1,3 (0,05")
1,6 (0,063")
1,8 (0,07")
2,2 (0,086")
2,4 (0.094")
A
Fig. 5.5
IX21D5
Reamer
Fig. 5.3