Carrier 42QHE009D8SH Installationshandbuch Seite 18

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.
Pipe
Reamer
Point down
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.
Flare nut
Copper pipe
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.
 Page 32 
PIPING EXTENSION BEYOND FLARE FORM
Outer Diameter of
Pipe (mm)
Ø 6.35 (Ø 0.25")
Ø 9.52 (Ø 0.375")
Ø12.7 ( Ø 0.5")
Ø 16 ( Ø 0.63")
Ø 19 ( Ø 0.75")
Flare form
Place flaring tool onto the form.
6.
Turn the handle of the flaring tool clockwise
7.
until the pipe is fully flared.
Remove the flaring tool and flare form, then
8.
inspect the end of the pipe for cracks and
even flaring.
Step 4: Connect pipes
When connecting refrigerant pipes, be careful
not to use excessive torque or to deform the
piping in any way. You should first connect the
low-pressure pipe, then the high-pressure pipe.
MINIMUM BEND RADIUS
When bending connective refrigerant piping,
the minimum bending radius is 10cm.
≥10cm (4in)
Radius
Instructions for Connecting Piping to
Indoor Unit
Align the center of the two pipes that you will
1.
connect.
Indoor unit tubing
A (mm)
Max.
Min. Max.
0.7 (0.0275") 1.3 (0.05")
1.6 (0.063")
1.0 (0.04")
1.0 (0.04") 1.8 (0.07")
2.0 (0.078") 2.2 (0.086")
2.0 (0.078") 2.4 (0.094")
A
Pipe
Flare nut Pipe