Installation manual R22 Cassette _English

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 outdoor unit.

■

Cut the pipes a little longer than measured distance.

■

Cut the cable 1.5m longer than the pipe length.

Copper tube

Point down

90

°

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.

Outside diameter mm inch

Ø6.35

1/4

Ø9.52

Ø15.88

Ø19.05

3/8

5/8

3/4

A mm

0.5~0.8

0.5~0.8

0.8~1.0

0.8~1.0

Firmly hold copper tube in a bar(or die) as indicated dimension in the table above.

Bar

Copper tube

Flare nut

"A"

Bar

Slanted Uneven Rough

Pipe

Reamer

Copper pipe

Clamp handle

Handle

Yoke

Cone

Red arrow mark

Smooth all round

Inside is shining without scratches

= Improper flaring =

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.

Inclined Surface damaged

Cracked Uneven thickness

Even length all round

10