3
.
Processing of refrigerant piping
(1) Pipe cutting
·
Cut the cooper pipe correctly with pipe cutter.
(2) Burrs removal
·
Completely remove all burrs from the cut cross section of the pipe.
·
Put the end of the copper pipe downward to prevent burrs from
dropping in the pipe.
(3) Putting nut on
·
Remove flare nuts attached to indoor and outdoor units, then put
them on pipe having completed burr removal.
(Not possible to put them on after flaring work).
·
Flare nut for pipe depending on the diameter of pipe.
(4) Flaring work
·
Perform flaring work using flaring tool as shown below.
(5) Check
·
Compare the flared work with the figure below.
·
If flare is noted to be defective, cut off the flared section and perform flaring work again.
危
险
！
C A U T I O N
(
3
)
Piping thickness
shows as below
.
Thickness
Diameter
When installing pipe through
the wall, secure a cap at the
end of the pipe
.
Correct
Correct
Incorrect
Incorrect
Correct
Incorrect
Hole
Hole
Attach
a
cap
or
vinyl
tape
.
Protected with the tape or plug.
Attach
a
cap
or vinyl bag with
rubber band
.
Do not place the pipe
directly on the ground
.
Rain water can
enter
.
Diameter
Tilted Uneven Burred
No good
Good
o
90
Burr
Copper pipe
Spare
reamer
Pipe cutter
Flare nut
Copper pipe
Flaring tool
Clutch type
Wing nut type
Die
Copper pipe
Flare nut
Copper pipe
Die
York
Smooth all around
Inside is shining without any scratches
Installation instructions
(mm)
(mm)
(Unit: mm)
(1
)
Prepare the copper pipe on the spot.
(2) Choose dustless, non-humid, clean copper pipe. Before installing the pipe, use nitrogen or dry air to blow away
the dust and impurity on the tube.
Additional refrigerant charge
The unit has been filled with refrigerant, but if L (total pipe length) exceeds standard lengh, additional charge with refrigerant (R32) is
necessary.
For 35/42/52
Additional refrigerant charge =(L-10)
×
12g/m
For 62/72
Additional refrigerant charge =(L-15)
×
12g/m
2. Piping material
13
