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Installation instructions
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
(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.
(3) Piping thickness shows as below.
Diameter
Thickness
(mm)
(mm)
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.
Copper pipe
Burr
No good
Good
Tilted Uneven Burred
o
90
Flare nut
Spare
reamer
Pipe cutter
Copper pipe
When installing pipe through
the wall, secure a cap at the
end of the pipe.
Incorrect
Correct
Correct
Hole
Hole
Attach a cap
or vinyl tape.
Flaring tool
Clutch type
Die
Copper pipe
Flare nut
13
C A U T I O N
！
危
险
Do not place the pipe
Correct
directly on the ground.
Incorrect
Protected with the tape or plug.
Diameter
Wing nut type
Inside is shining without any scratches
Smooth all around
York
Die
Copper pipe
Incorrect
Rain water can
enter.
Attach a cap
or vinyl bag with
rubber band.
(Unit: mm)
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