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6. Connecting Pipes to the Indoor Unit
• Preparation of Piping
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 purchased
locally.
■ Measure the distance between the indoor and the out-
door unit.
■ Cut the pipes a little longer than measured distance.
■ Cut the cable 1.5m 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 downward
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 outdoor
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 indicated
dimension in the table above.
5) Check
■ Compare the flared work with figure below.
■ If flare is noted to be defective, cut off the flared sec-
tion and do flaring work again.
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