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Installation Manual 11
Flaring Work and Connection of Piping
Flaring Work and Connection of Piping
Flaring work
Main cause for gas leakage is due to defect in flaring work. Carry out the correct flaring work by
using the following procedures.
Cut the pipes
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 1.5 m (5.0 ft) 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.
Putting flare nuts on
1. 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)
Flaring work
1. Carry out flaring work using flaring tool as
shown below.
2. Firmly hold copper pipe in a bar in the
dimension shown in the table below.
Copper
pipe
90°
Slanted Uneven Rough
Pipe
Reamer
Point down
Flare nut
Copper tube
mm inch mm inch
Ø6.35 1/4 1.1~1.3 0.4 - 0.5
Ø9.52 3/8 1.5~1.7 0.6 - 0.7
Outside diameter A
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A"