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3-3.
PIPE
CONNECTION
«
Fasten
flare
nut
with
a
torque
wrench
as
specified
in
the
table
above.
«
When
fastened
too
tight,
flare
nut
may
eventually
break
and
cause
refrigerant
leakage.
Indoor
unit
connection
Connect
both
liquid
and
gas
piping
to
indoor
unit.
«
Apply
a
thin
coat
of
refrigerant
oil
(J)
on
the
seat
surface
of
pipe.
*
Toconnect,
first
align
the
center,
then
tighten
the
first
3
to
4
turns
of
flare
nut.
*
Use
tightening
torque
table
in
(3-2.)
as
a
guideline
for
indoor
unit
side
joints,
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
following
the
same
procedure
detailed
in
Indoor
unit
connection.
*
For
tightening,
use
a
torque
wrench
or
spanner.
A
WARNING
When
installing
the
unit,
securely
connect
the
refrigerant pipes
before
starting
the
compressor.
3-4.
INSULATION
AND
TAPING
1)
Cover
piping
joints
with
pipe
cover.
2)
For
outdoor
unit
side,
insulate
the
piping,
including
valves.
3)
Apply
piping
tape
(G)
starting
from
the
connection
on
the
outdoor
unit.
«
When
piping
has
to
be
installed
through
a
ceiling,
closet
or
where
the
temperature
and
humidity
are
high,
use
additional
field-supplied
insulation
to
prevent
condensation.
4.
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
valves
are
fully
closed
and
covered
in
caps
in
initial
state.)
2)
Connect
gauge
manifold
valve
and
vacuum
pump
to
service
port
of
stop
valve
on
the
gas
pipe
side
of
the
outdoor
unit.
3)
Run
the
vacuum
pump
15
minutes
or
more.
4)
Check
the
vacuum
with
the
gauge
manifold
valve,
then
close
it
and
shut
off
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
mmHg]J).
6)
Quickly
remove
gauge
manifold
valve
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
the
unit
without
fully
opening
the
valves
lowers
the
performance
and
causes
problems.
8)
Refer
to
1-3.
SPECIFICATIONS,
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.
10)
Conduct
a
leak
test
4-2.
TEST
RUN
1)
Insert
power
supply
plug
into
the
power
outlet
and/or
turn
on
the
breaker.
2)
Press
the
E.O.
SW
once.
Test
run
will
be
performed
for
30
minutes.
If
the
left
operation
indicator
light
blinks
every
0.5
seconds,
inspect
the
indoor/outdoor
unit
connecting
wire
(A).
After
the
test
run,
emergency
COOL
mode
(75°F
[24°C]
COOL)
willstart
3)
To
stop
operation,
press
the
E.O.
SW
several
times
until
all
LED
lamps
turn
off.
Refer
to
operating
instructions
for
de-
tails.
Emergency
operation
switch
. . . .
(E.0.
SW)
Checking
the
remote
(infrared)
signal
reception
Press
the
ON/OFF
button
on
the
remote
controller
and
listen
for
an
audible
indicator
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
cut
off
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.)
0.101
MPa
Compound
pressure
gauge
*4
to 5
turns
Frorque 106
to
(-30
inHg
(for
R410A)
.
29.4
Nem,
15
to
[-760
mmHg)
Pressure
gauge
Close
22
tbfefl
[200
to
Stop
valve
(for
R410A)
for
LIQUID
Gauge
manifold
valve
(for
R410A)
*Open
‘|
300
kgf*cm])
Handle
High
Hexagonal
wrench
pe
Charge
hose
(for
R410A)
Service
port
cap
(Torque
13.7
to
17.7
Nem,
10
to
13
Ibfeft
[140
to
180
kgfecm])
Adapter
for
pre-
MENTE
venting
the
back
flow
Vacuum
pump
(or
the
vacuum
pump
with
the
function
to
prevent
the
back
flow)
[Precautions
when
using
the
control
valve]
When
attaching
the
control
valve
to
the
service
port.
valve core
ma
deform
or
loosen
if
excess
pressure
is.applied.
This
may
cause
gas
leak,
g
4
When
attaching
the
control
valve
to
/
Service
port
the
service
port,
make
sure
that
the
Controt
vane
valve
core
is
in
closed
position,
and
Onen’®
oo
then tighten
part
A.
Do
not
tighten
pen
part
A
or
turn
the
body
when
valve
Close
Charge
hose
vo
igs
Body
core
is
in
open
position.
Caution:
«
After
test
run
or
remote
signal
reception
check,
turn
off
the
unit
with
the
E.O.
SW
or
the
remote
controller
before
turning
off
the
power
supply.
If
this
procedure
is
not
performed,
the
unit
will
automatically
begin
operation
when
power
supply
is
resumed.
To
the
user
*
After
installing
the
unit,
explain
to
the
user
about
auto
restart
function.
«
[f
auto
restart
function
is
unnecessary,
it
can
be
deactivated.
Consult
the
service
representative
to
deactivate
the
function.
Refer
to
the
service
manual
for
details.
4-4.
EXPLANATION
TO
THE
USER
«
Using
the
OPERATING
INSTRUCTIONS,
explain
to
the
user
how
to
use
the
air
conditioner
(the
remote
controller,
removing
the
air
filters,
placing
or
removing
the
re-
mote
controller
from
the
remote
controller
holder,
cleaning
methods,
precautions
for
operation,
etc.)
«
Recommend
that
the
user read
the
OPERATING
INSTRUCTIONS
carefully.
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