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INSTALLATION MANUAL
Firmly hold copper pipe in a die in the dimension shown in the table
above.
5.Check
·
Compare the flared work with the figure below.
·
If flare is noted to be defective, cut off the flared section and per-
form flaring work again.
Good
o
90
Copper pipe
Burr
Spare
reamer
Pipe cutter
Flaring tool
Clutch type
York
Die
Copper pipe
Flare nut
Copper pipe
No good
Tilted Uneven Burred
Flare nut
Copper pipe
Wing nut type
Inside is shining without any scratches
Smooth all around
Die
5-3. PIPE CONNECTION
Note:
Fasten a flare nut with a torque wrench as specified in the
table below. When fastened too tight, a flare nut may be
broken after a long period and cause a leakage of refrigerant.
1.Indoor unit connection
·
Connect both liquid pipe and gas pipe to indoor unit.
-Apply a thin coat of refrigeration oil to the seat surface of pipe.
-For connection, align the center of both pipe and union, then tighten
the first 3 to 4 turns in flare nut by hand.
-For tightening the union part of the indoor unit side, use the table below
as a standard and tighten the flare nut with two wrenched. Excessive
tightening damages the flared section.
Pipe diameter
N·m
φ6.35mm
13.7 to 17.7
φ9.52mm
34.3 to 41.2
φ12.7mm
49.0 to 56.4
φ15.88mm
73.5 to 78.4
2.Outdoor unit connection
·
Connect pipe to the pipe joint part of the stop valve in the same method
as the indoor unit.
-For tightening, use the same tightening torque applied for indoor unit
and tighten the flare nut with torque wrench or spanner.
10
Tightening torque
Kgf·cm
140 to 180
350 to 420
500 to 575
750 to 800
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