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3. Installing the indoor unit
d)
®
3.4. Mounting the indoor unit (Fig. 3-11)
(j)
Make
sure to hang the metal
catches
of the indoor
unit over the hooks
of the wall
mounting
fixture.
When
the piping
has been
completed,
use the securing
screws
to fix the indoor
unit on the wall mounting
fixture.
Fig. 3=11
Note:
Check
that the catches
of the indoor
unit
securely
fit over
the hooks
of the wall
mounting
fixture.
3_ The
screw
indicated
by the bold
arrow
is used
only
during
transportation
and
should
be removed.
Remove
the screw
before
installation
if there
is not enough
space
at the left side to remove
it once the unit has been installed.
_A_Indoor unit
(B_Wall fixing bracket _
(C) Hook
_ Metal catch of the indoor unit
(9 Securing screws
4. Installing
the refrigerant
piping
4.1. Precautions
4.1.1.
For
devices
that
use
R410A
refrigerant
= Use ester oil, ether
oil, alkylbenzene
oil (small
amount)
as the refrigeration
oil
applied
to the flared
sections.
•
Use C1220
copper
phosphorus,
for copper
and copper
alloy
seamless
pipes,
to connect
the refrigerant
pipes.
Use refrigerant
pipes
with
the thicknesses
specified
in the table
to the
below.
Make
sure
the insides
of the
pipes
are
clean
and
do not
contain
any
harmful
contaminants
such
as sulfuric
com-
pounds,
oxidants,
debris,
or dust.
z_ Warning:
When
installing
or moving
the air conditioner,
use only
the specified
refriger-
ant (R4t 0A) to charge
the refrigerant
lines.
Do not mix it with any other
refriger-
ant and
do
not allow
air to remain
in the
lines. Air enclosed
in the
lines
can
cause
pressure
peaks
resulting
in a rupture
and
other
hazards.
A24, A30, A36
Liquid
pipe
e9.52
mm,
3/8 inch
thickness
0.8 mm,
1/32 inch
Gas pipe
o15.88
mm,
5/8 inch
thickness
1.0 mm, 3/64
inch
= Do not use pipes
thinner
than
those
specified
above.
(_)
45o±2 °
(_
Fig. 4-1
®
Flare
cutting
dimensions
Copper
pipe O.D.
Flare dimensions
(mm, inch)
_A dimensions
(ram,
inch)
e6.35,
1/4"
8.7-
9.1, 11/32-23/64
e9.52,
3/8"
12.8 - 13.2,
1/2-33/64
o12.7,
1/2"
16.2 - 16.6, 41/64-21/32
e15.88,
5/8"
19.3 - 19.7, 49/64-25/32
(inch) 4.2. Connecting
pipes (Fig. 4-1)
• When
commercially
available
copper
pipes
are used,
wrap
liquid
and gas pipes
with commercially
available
insulation
materials
(heat-resistant
to 100 °C, 212 °F or
more,
thickness
of 12 mm,
1/2 inch or more).
The
indoor
parts of the drain pipe should
be wrapped
with polyethylene
foam insu-
lation materials
(specific
gravity
of 0.03, thickness
of 9 mm, 23/64
inch or more).
(_
• Apply
thin layer of refrigerant
oil to pipe and joint seating
surface
before
tightening
flare
nut.
Use two wrenches
to tighten
piping
connections.
Use refrigerant
piping
insulation
provided
to insulate
indoor unit connections.
Insu-
late carefully.
(_) Flare nut tightening torque
Copper pipe O.D.
(mm, inch)
06.35, 1/4"
09.52, 3/8"
o12.7, 1/2"
o15.88, 5/8"
Flare
nut O.D.
Tightening
torque
(mm, inch)
(N.m,
ft.lbs)
17, 43/64
14-
18, 10-13
22, 7/8
34 - 42, 25-30
26, 1-3/64
49 - 61,35-44
29, 1-9/64
68 - 82, 49-59
(c) Apply refrigerating machine oil over the entire flare seat surface.
_ Use correct flare nuts meeting the pipe size of the outdoor unit.
Available
pipe
size
Liquid
side
Gas side
A24, A30, A36
09.52
e15.88
O : Factory
flare
nut attachment
to the heat-exchanger.
5
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