Installation guide
3-3.
PIPE
CONNECTION
*
Fasten
flare
nut
with
a
torque
wrench
as
specified
in
the
table.
«
When
fastened
too
tight,
flare
nut
may
brake
after
a
long
period
and
cause
refrigerant
leakage.
indoor
unit
connection
Connect
both
liquid
and
gas pipings
to
indoor
unit.
*
Apply
a
thin
coat
of
refrigeration
oil
(J)
on
the
seat
surface
of
pipe.
*
For
connection,
first
align
the
center,
then
tighten
the
first
3
to
4
turns
of
flare
nut.
*
Use
tightening
torque
table
below
as
a
guideline
for
indoor
unit
side
union
joint
section,
and
tighten
using
two
wrenches.
Excessive
tightening
damages
the
flare
section.
Outdoor
unit
connection
Connect
pipes
to
stop
valve
pipe
joint
of
the
outdoor
unit
in
the
same
manner
applied
for
indoor
unit.
*
For
tightening,
use
a
torque
wrench
or
spanner
and
use
the
same
tightening
torque
ap-
plied
for
indoor
unit.
3-4.
INSULATION
AND
TAPING
4)
Cover
piping
joints
with
pipe
cover.
2)
For
outdoor
unit
side,
surely
insulate
every
piping
including
valves.
3)
Using
piping
tape
(G),
apply
taping
starting
from
the
entry
of
outdoor
unit.
*
Stop
the
end
of
piping
tape
(G)
with
tape
(with
adhesive
agent
attached).
*
When
piping
have
to
be
arranged
through
above
ceiling,
closet
or
where
the
temper-
ature
and
humidity
are
high,
wind
additional
commercially
sold
insulation
to
prevent
condensation.
PURGING
PROCEDURES,
LEAK
TEST,
AND
TEST
RUN
4-1.
PURGING
PROCEDURES
AND
LEAK
TEST
1)
Remove
service
port
cap
of
stop
valve
on
the
side
of
the
outdoor
unit
gas
pipe.
(The
stop
valve
will
not
work
in
its
initial
state
fresh
out
of
the
factory,
totally
closed
with
cap
on.)
2)
Connect
gauge
manifold
valve
and
vacuum
pump
to
service
port
of
stop
valve
on
the
gas
pipe side
of
the
outdoor
unit.
(
~0.101
MPa
Compound
pressure
gauge
*4
to
5
tums
Stop
valve
cap
(-30
in.Hg
(for
R410A)
(Torque
19.6
to
[-760
mHg])
Pressure
gauge
*Close
“Open
1
ls
}
2
Hexagonal
wrench
29.4
Nem, 200
to
300
kgfrom)
SLOP
valve
for
LIQUID
#
(for
R410A)
Gauge
manifold
vaive
(for
R410A)
Handle
High
Charge
hose
(for
R410A)
Service
port
cap
(Torque
13.7
to
17.7
Nem,
140
to
180
kgfecm)
Adapter
for
pre-
Th
venting
the
back
flow
Vacuum
pump
(or
the
vacuum
pump
with
the
function
to
prevent
the
back
flow)
When
attaching
the
control
valve
to.
the
service
port.
valve
core
may
deform
or
loosen
if
excess
pressure
is
applied.
This
may
cause
gas
leak.
Precautions
when
using
the
control
valve
g
When
attaching
the
control
valve
to
the
service
port,
make
sure
that
the
valve
core
is
in
closed
position,
and
/
Service
port
Control
valve
=
then
tighten
part
A.
Do
not
tighten
Open
Charae
hose
part
A
or
turn
the
body
when
valve
ose
Body
g
core
is
in
open
position.
4-2.
TEST
RUN
1)
Insert
power
supply
plug
into
the
power
outlet
and/or
turn
on
the
breaker.
Check
that
all
LED
lamps
are
not
lit.
If
they
are
blinking,
check
that
the
horizontal
vane
is
installed
correctly.
Refer
to
operating
instructions
for
details.
2)
Press
the
E.O.
SW.
Test
run
will
be
performed
for
30
minutes.
If
the
left
side
lamp
of
the
operation
indicator
blinks
every
0.5
seconds,
inspect
the
indoor/outdoor
unit
connecting
wire
(A)
for
mis-wiring.
After
the
test run,
emergency
COOL
mode
(75°F
[24°C]
COOL)
will
start.
3)
To
stop
operation,
press
the
E.O.
SW
several
times
until
all
LED
lamps
turn
off.
Refer
to
operating
instructions
for
details.
Emergency
operation
switch
(E.0.
SW)
Checking
the
remote
(infrared)
signal
reception
Press
the
ON/OFF
button
on
the
remote
controller
and
check
that
an
electronic
sound
is
heard
from
the
indoor
unit.
Press
the
ON/OFF
button
again
to
turn
the
air
conditioner
off.
*
Once
the
compressor
stops,
the
restart
preventive
device
operates
so
the
compressor
will
not
operate
for
3
minutes
to
protect
the
air
conditioner.
4-3.
AUTO
RESTART
FUNCTION
This
product
is
equipped
with
an
auto
restart
function.
When
the
power
supply
is
stopped
during
operation,
such
as
during
blackouts,
the
function
automatically
starts
operation
in
the
previous
setting
once
the
power
supply
is
resumed.
(Refer
to
the
operating
instructions
for
details.)
Caution:
*
After
test
run
or
remote
signal
reception
check,
tum
off
the
unit
with
the
E.O.
SW
or
the
remote
controller
before
turing
off
the
power
supply.
Not
doing
so
will
cause
the
unit
to
start
operation
automatically
when
power
supply
is
resumed.
To
the
user
*
After
installing
the
unit,
make
sure
to
explain
the
user
about
auto
restart
function.
*
f
auto
restart
function
is
unnecessary,
it
can
be
deactivated.
Consult
the
service
rep-
resentative
to
deactivate
the
function.
Refer
to
the
service
manual
for
details.
3)
Run
the
vacuum
pump.
(Vacuumize
for
more
than
15
minutes.)
4)
Check
the
vacuum
with
gauge
manifold
valve,
then
close
gauge
manifold
valve,
and
stop
the
vacuum
pump.
5)
Leave
as
it
is
for
one
or
two
minutes.
Make
sure
pointer
gauge
manifold
valve
remains
in
the
same
position.
Confirm
that
pressure
gauge
shows
~0.101
Mpa
[Gauge]
(~30
in.Hg
[-760
mmbg}).
6)
Remove
gauge
manifold
valve
quickly
from
service
port
of
stop
valve.
7)
After
refrigerant
pipes
are
connected
and
evacuated,
fully
open
all
stop
valves
on
both
sides
of
gas
pipe
and
liquid
pipe.
Operating
without
fully
opening
lowers
the
perform-
ance
and
this
causes
trouble.
8)
Refer
to
1-3.,
and
charge
the
prescribed
amount
of
refrigerant
if
needed.
Be
sure
to
charge
slowly
with
liquid
refrigerant.
Otherwise,
composition
of
the
refrigerant
in
the
system
may
be
changed
and
affect
performance
of
the
air
conditioner.
9)
Tighten
cap
of
service
port
to
obtain
the
initial
status.
10)
Leak
test
4-4,
EXPLANATION
TO
THE
USER
*
Using
the
OPERATING
INSTRUCTIONS,
explain
to
the
user
how
to
use
the
air
condi-
tioner
(how
to
use
the
remote
controller,
how
to
remove
the
air
filters,
how
to
remove
or
put
the
remote
controller
in
the
remote
controller
holder,
how
to
clean,
precautions
for
operation,
etc.)
*
Recommend
the
user
to
read
the
OPERATING
INSTRUCTIONS
carefully.