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3-1. Preparation of Piping
3. Connecting Pipes to the Indoor Unit
Main cause of gas leakage is defect in flaring work.
Carry out correct flaring work in the following proce-
dure.
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 dis-
tance.
■ 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 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 possibe 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 die as indicated dimen-
sion in the table above.
5) Check
■ Compare the flared work with figure below.
■ If flare is noted to be defective, cut off the flared
section and do flaring work again.
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