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Service Manual
Flaring Work and Connection of Piping
Flaring work
The main cause for gas leakage is due to defects in flaring work. Carry out correct flaring work using the following procedures.
Cut the pipes
1. Use the copper pipe 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 (5.0ft) longer than the pipe length.
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.
Adding the Flare Nut
• Remove flare nuts attached to the indoor and outdoor unit,
then put them on the end of the copper pipe once you hav
completed burr removal (it is not possible to put them on after
the flaring work)
Flaring work
• Carry out flaring work using flaring tool as shown below.
• Firmly hold copper pipe in the proper size hole dimension of
the bar as shown in the table below.
Copper
pipe
90°
Slanted Uneven Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
mm inch mm
Ø6.35 1/4 0~0.5
Ø9.52 3/8 0~0.5
Outside diameter A
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"
Flaring Work and Connection of Piping