iAIRE, LLC
69
SHVAC
Residential Mini-Split and Mounting Kit I/O/M
Appendix 3
Air Conditioner Service Manual
50
Appendix 3 Pipes Flaring
Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following
procedure.
A. Cut the pipes and the cable.
1) Use the piping kit accessory or the pipes purchased locally.
2) Measure the distance between the indoor and the outdoor unit.
3) Cut the pipes a little longer than measured distance.
4) Cut the cable 1.5m(4.9ft) longer than the pipe length.
B. Burrs removal
1) Completely remove all burrs from the cut cross section of pipe/tube.
2) Put the end of the copper tube/pipe in a down ward direction as you remove burrs in order to avoid dropping
burrs into the tubing.
C. Flaring work
• Carry out flaring work using flaring tool as shown below.
Outside diameter
A
mm
inch
mm /inch
ø6.35
1/4
1.0~1.3(0.04~0.06)
ø9.52
3/8
0.8~1.0(0.03~0.04)
ø12.7
1/2
0.5~0.8(0.02~0.03)
ø15.88
5/8
0.5~0.8(0.02~0.03)
Firmly hold copper pipe in a die in the dimension shown in the table above.
D. Check
1) Compare the flared work with figure below.
2) If flare is noted to be defective, cut off the flared section and do flaring work again.
