Installation Manual
13
Flaring Work and Connection of Piping
ENGLISH
Flaring Work and Connection of Piping
Flaring work
Main cause of gas leakage is defect in flaring
work. Carry out correct flaring work in the following
procedure.
1. Cut the pipes and the cable.
• Use the accessory piping kit or the pipes pur-
chased locally.
• Measure the distance between the indoor and
the outdoor unit.
• Cut the pipes a little longer than measured
distance.
• Cut the cable 1.5m(4.9ft) longer than the pipe
length.
2. Burrs removal
• Completely remove all burrs from the cut
cross section of pipe/tube.
• Put the end of the copper tube/pipe to down-
ward direction as you remove burrs in order to
avoid to let burrs drop in the tubing.
3. Putting nut on
• Remove flare nuts attached to indoor and out-
door units, than put them on pipe/tube having
completed burr removal.
(Not possible to put them on after flaring work)
4. Flaring work
• Carry out flaring work using flaring tool as
shown below.
Firmly hold copper tube in a bar(or die) as indi-
cated dimension in the table above.
5. Check
• Compare the flared work with figure.
• If flare is noted to be defective, cut off the
flared section and do flaring work again.
Copper
tube
90
Slanted Uneven Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Inclined
Inside is shining without scratches.
Smooth all round
Even length
all round
Surface
damaged
Cracked Uneven
thickness
= Improper flaring =
mm inch mm inch
Ø6.35 1/4 1.1~1.3 0.04~0.05
Ø9.52 3/8 1.5~1.7 0.06~0.07
Ø12.7 1/2 1.6~1.8 0.06~0.07
Outside diameter
A
