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 depends on the diameter of pipe.
(4) Flaring Work
·
Perform flaring work with 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
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
.
Attach a cap
or vinyl tape
.
Attach a cap
or vinyl bag with
rubber band
.
Do not place the pipe
directly on the ground
.
Rain
water
can
enter
.
Diameter
d
ø
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
4. Piping
Connection
(1) Confirm
that
the
valve
is
closed
.
(2) Connect
the
indoor
unit
and
the
outdoor unit
with
field
-
supplied
refrigerant
piping
.
Suspend
the
refrigerant
piping
at
certain points
and
prevent
the
refrigerant
piping from
touching
the
weak
part
of
the
building such
as
wall
,
ceiling
,
etc
.
(
If
touched
,
abnormal
sound
may
occur
due to
the vibration
of
the
piping
.
Pay
special attention
in
case
of
short
piping
length
.)
(
3
)
Tighten the
flare
nut with two spanners as shown in the right figure.
(
4
)
Apply
the
refrigerant oil
(
field-supplied
)
thinly
at
the
seat
surface
of
the flare
nut
and
pipe
before
connecting
and
tightening
.
And
when
tightening
the
flare
nut
,
use
two spanners
.
(
5
)
Outdoor refrigerant piping should connect with stop valve.
Double Spanner
W
ork
Installation instructions
7
Pipe Size [in. (mm)]
Torque
[
lbf ft
.
(N m
)]
Tightening
Torque
for
Flare
Nut
[Unit: in. (mm)]
1/4 (6.35)
3/8 (9.52)
1/2 (12.7)
5/8 (15.88)
1/64
11/32 (9.1)
1/2 (13.2)
10/16 (16.6)
3/4 (19.7)
0.4
)
(
ø
1/4 (6.35)
ø
3/4 (19.05)
ø
5/8 (15.88)
ø
1/2 (12.7)
ø
3/8 (9.52)
.
.
14.8 (20)
73.8 (100)
59.0 (80)
44.3 (60)
29.5 (40)
