Flaring Work And Connection Of Piping - TCL TAC-07CS Service Manual

3.5 Flaring work and connection of piping

3.5.1 Flaring work
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 pur-
chased locally.
2) Measure the distance between the indoor and the
outdoor unit.
3) Cut the pipes a little longer than measured dis-
tance.
4) Cut the cable 1.5m longer than the pipe length.
Copper
pipe
90°
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 downward
direction as you remove burrs in order to avoid
dropping burrs into the tubing.
Point down
C Putting nut on
• Remove flare nuts attached to indoor and outdoor
unit, then put them on pipe/tube having completed
burr removal.
(not possible to put them on after flaring work)
Flare nut
Copper tube
TCL Air Conditioner Service Manual
Slanted Uneven Rough
Pipe
Reamer
D. Flaring work
• Carry out flaring work using flaring tool as shown
below.
Outside diameter
mm
ø6.35
ø9.52
ø12.7
ø15.88
Firmly hold copper pipe in a die in the dimension shown in
the table above.
Bar
Copper pipe
Clamp handle
E. Check
1) Compare the flared work with figure below.
2) If flare is noted to be defective, cut off the flared sec-
tion and do flaring work again.
Smooth all round
Inside is shiny without scratches
Even length
all round
6
A
inch mm
1.0~1.3
1/4
3/8 0.8~1.0
1/2 0.5~0.8
0.5~0.8
5/8
Handle
Bar
Yoke
Cone
Red arrow mark
= Improper flaring =
Inclined Surface Cracked Uneven
damaged thickness