20 Refrigerant Piping Connection
Figure
6-2
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. 6.3.
Figure
6-3
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.
Figure
6-4
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")
Ø 12.7 (Ø 0.5")
1.0 (0.04")
1.8 (0.07")
Ø 16 (Ø 0.63")
2.0 (0.078")
2.2 (0.086")
Figure
6-5
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 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.
Copper pipe
Flare nut
Flare form
Pipe
Point down
Pipe
Reamer
Bosch Climate 5000
6 720 866 139 (2016/07)
