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4.
Installing
the
outdoor
unit
Max.
1-3/16
®
M3/8
(M10)
bolt
®
Base
©
As
long
as
possible.
©
Vent
©
Setdeep
in
the
ground
23-5/8
Min.
14-6/62
-
Min.
13/82)
|6-7/8
[7
37.
23-5/8
7
1
(Qs
|
oS
Tig
8-718
|
5
13/32
©
Fig.
4-1
5.
Installing
the
refrigerant
piping
(inch)
*
Be
sure
to
install
the
unit
in
a
sturdy,
level
surface
to
prevent
rattling
noises
dur-
ing
operation.
(Fig.
4-1)
<Foundation
specifications>
Foundation
boit
M10
Thickness
of
concrete
120
mm
(4-2
of
bolt
70
mm
(2-3/4
320
lbs
*
Make
sure
that
the
length
of
the
foundation
boit
is
within
30
mm
(1-3/16”)
of
the
bottom
surface
of
the
base.
*
Secure
the
base
of
the
unit
firmly
with
four-M10
foundation
bolts
in
sturdy
loca-
tions.
Installing
the
outdoor
unit
*
Do
not
block
the
vent.
If
the
vent
is
blocked,
operation
will
be
hindered
and
break-
down
may
result.
*
In
addition
to
the
unit
base,
use
the
installation
holes
on
the
back
of
the
unit
to
at-
tach
wires,
etc.,
if
necessary
to
install
the
unit.
Use
self-tapping
screws
(#5
x
15
mm,
213/16”
x
19/32”
or
less)
and
install
on
site.
AN
Warning:
«
The
unit
must
be
securely
installed
on
a
structure
that
can
sustain
its
weight.
If
the
unit
is
mounted
on
an
unstable
structure,
it
may
fall
down
and
cause
damage
or
injuries.
«
The
unit
must
be
installed
according
to
the
instructions
in
order
to
mini-
mize
the
risk
of
damage
from
earthquakes,
typhoons,
or
strong
winds.
An
incorrectly
installed
unit
may
fall
down
and
cause
damage
or
injuries.
®
Outdoor
unit
Branch
box
©
Indoor
unit
5.1.
Precautions
for
devices
that
use
R410A
refrigerant
Refer
to
page
3
for
precautions
not
included
below
on
using
air
conditioners
with
R410A
refrigerant.
Use
ester
oil,
ether
oil,
alkylbenzene
oil
(small
amount)
as
the
refrigeration
oil
ap-
plied
to
the
flared
sections.
Use
©1220
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
compounds,
oxidants,
debris,
or
dust.
AN
Warning:
When
installing
or
moving
the
air
conditioner,
use
only
the
specified
refriger-
ant
(R410A)
to
charge
the
refrigerant
lines.
Do
not
mix
it
with
any other
refrig-
erant
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.
26.35
mm
(1/4
inch),
@8.52
mm
(3/8
inch),|Thickness
0.8
mm
(1/82
inch)
212.7
mm
(1/2
inch)
215.88
(5/8
inch)
Thickness
1.0
mm
(5/128
inch)
*
Do
not
use
pipes
thinner
than
those
specified
above.
Total
piping
length
b1+b2+a1t+a2+a3+a4+a5+a6+a7+
a8
5
115
m
(377
ft.)
Permissible
|
Farthest
piping
length
(L)
b2
+
a8
<
70
m
(230
ft.)
(b2
=
55
m
(180
ft.),
a8
S
15
m
(49
ft.)
length
Piping
length
between
outdoor
unit
and
branch
boxes
bi
+
b2
55
m
(180
ft.)
(one-way)
Farthest
piping
length
after
branch
box
(I)
a8
<=
15
m
(49
ft.)
Total
piping
length
between
branch
boxes
and
indoor
units
ait+a2+a3+a4+a5+a6+a7+a8<
60
m
(197
ft.)
Permissible
In
indoor/outdoor
section
(H)
*1
H
s
30
m
(98
ft.)
(In
case
of
outdoor
unit
is
set
higher
than
indoor
unit)
H
s
20
m
(66
ft.)
(In
case
of
outdoor
unit
is
set
lower
than
indoor
unit)
height
difference]
In
branch
box/indoor
unit
section
(h1)
ht
+h2
5
15
m
(49
ft)
(one-way)
In
each
branch
unit
(h2)
h2
=
15
m
(49
ft.)
In
each
indoor
unit
(h3)
h3
=
12
m
(39
ft.)
Number
of
bends
|
b1+al
|,
|
b1+a2
|,
|b1+a3
|,
|
bi+a4
|,
|b1+a5
|,
|
b2+a6
|,
|
b2+a7
|,
|
b2+a8
|<
15
*{
Branch
box
should
be
placed
within
the
level
between
the
outdoor
unit
and
indoor
units.
5.2.
Pipe
length
and height
difference
(Fig.
5-1)
Flared
connections
*
This
unit
has
flared
connections
on
each
indoor
unit
and
branch
box
and
outdoor
unit
sides.
*
Remove
the
valve
cover
of
the
outdoor
unit,
then
connect
the
pipe.
*
Refrigerant
pipes
are
used
to
connect
the
branch
box
and
outdoor
unit.
6
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