18 Room Air Conditioner
Flaring work and connection of piping
Flaring work and connection of piping
Flaring work
Flaring work
Main cause for refrigerant leakage is due to defect in the
flaring work. Carry out correct flaring work using the follow-
ing procedure.
Cut the pipes and the cable.
• Use the piping kit accessory or pipes purchased locally.
• Measure the distance between the indoor and the outdoor unit.
• Cut the pipes a little longer than the measured distance.
• Cut the cable 1.5m longer than the pipe length.
Check
• Compare the flared work with figure below.
• If flare is noted to be defective, cut off the flared sec-
tion and re-flare it.
• Preparing the indoor unit's piping and drain hose for instal-
lation through the wall.
• Remove the plastic tubing retainer(see illustration below)
and pull the tubing and drain hose away from chassis.
• Replace the plastic tubing holder in the original
position.(Optional)
• Carry out flaring work using flaring tool as shown below.
Burr removal
• Completely remove all burrs from the cut cross section of
pipe/tube.
• Put the end of the copper tube/pipe in a downward direc-
tion as you remove burrs in order to avoid dropping burrs
into the tubing.
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)
Flaring work
• Firmly hold copper pipe in a die in the dimension shown in
the table above.
mm inch mm
Ø6.35 1/4 0~0.5
Ø9.52 3/8 0~0.5
Ø12.7 1/2 0~0.5
Ø15.88 5/8 0~1.0
Ø19.05 3/4 1.0~1.3
Outside diameter A
Connection of piping -- Indoor
When install, make sure that the
remaining parts must be removed
clearly so as not to damage the pip-
ing and drain hose, especially power
cord and connecting cable.
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