Processing Of Piping Materials - Sharp AH-X08CR Service Manual

2.2 Processing of Piping Materials

When performing the refrigerant piping installation, care should be taken to ensure that water or dust does
not enter the pipe interior, that no other oil other than lubricating oils used in the installed air conditioner is
used, and that refrigerant does not leak. When using lubricating oils in the piping processing, use such
lubricating oils whose water content has been removed. When stored, be sure to seal the container with an
airtight cap or any other cover.
(1) Flare Processing Procedures and Precautions
a) Cutting the Pipe
By means of a pipe cutter, slowly cut the pipe so that it is not deformed.
b) Removing Burrs and Chips
If the flared section has chips or burrs, refrigerant leakage may occur. Carefully remove all burrs and
clean the cut surface before installation.
c) Insertion of Flare Nut
d) Flare Processing
Make certain that a clamp bar and copper pipe have been cleaned.
By means of the clamp bar, perform the flare processing correctly.
Use either a flare tool for R410A or conventional flare tool.
Flare processing dimensions differ according to the type of flare
tool. Be careful. When using a conventional flare tool, be sure to
secure "dimension A" by using a gage for size adjustment.
Norminal Norminal
diameter diameter
(mm)
1/4 6.35
3/8
9.52
1/2 12.70
5/8 15.88
Norminal Norminal
diameter diameter
(mm)
1/4 6.35
3/8 9.52
1/2 12.70
5/8
15.88
Norminal
diameter
1/4
3/8
1/2
5/8
Table 4. Dimensions related to Flare Processing for R410A
Thickness
(mm)
Flare tool fot R410A
0.8
0.8
0.8
1.0
Table 5. Dimensions related to Flare Processing for R22
Thickness
(mm)
Flare tool fot R410A
0.8
0.8
0.8
1.0
Table 6. Flare and Flare Nut Dimensions for R410A
Norminal Thickness
diameter (mm)
(mm)
6.35 0.8
9.52
0.8
12.70 0.8
15.88
1.0
A (mm)
Clutch type
Clutch type
0 ~ 0.5 1.0 ~ 1.5
1.0 ~ 1.5
0 ~ 0.5
0 ~ 0.5 1.0 ~ 1.5
0 ~ 0.5 1.0 ~ 1.5
A (mm)
Clutch type
Clutch type
0 ~ 0.5 0.5 ~ 1.0
0 ~ 0.5 0.5 ~ 1.0
0 ~ 0.5 0.5 ~ 1.0
0.5 ~ 1.0
0 ~ 0.5
Dimension (mm)
A B C
9.1 9.2 6.5
13.2 13.5 9.7
16.6 16.0 12.9
19.7 19.0 16.0
51
ØD
Fig. 3 Flare Processing DImensions
Conventional flare tool
Wing nut type
1.5 ~ 2.0
1.5 ~ 2.0
2.0 ~ 2.5
2.0 ~ 2.5
Conventional flare tool
Wing nut type
1.0 ~ 1.5
1.0 ~ 1.5
1.5 ~ 2.0
1.5 ~ 2.0
[Unit: mm]
Flare nut
width
D
13 17
20 22
23 26
25 29
AH/AY-X08CR
AH/AY-X10CR
AH/AY-X13CR