Owner`s manual
fab/'e74
13.5-16.5
11.5-.' 13.9
Hexagonal
wrench 6 mm
CAUTION
Always
use
a charge hose
for service
port
connection.
After tightening
the cap,
check that no refrigerant leaks
arepresent.
maintenance
nul
seal shafr
hexagon hole Fig.7-7
Using the
vacuum
pump
Loosen
and remove
the maintenance
nuts of stop valves
A
and B,
and connect
the charge
hose of the manifold valve to
the
service
port
of stop valve
A.
(Be
sure
that
stop
valves A
and
B are both
closed)
Connect the
joint
of the
charge
hose with the vacuum
pump.
Open the Lo-lever
of the
manifold value
completely.
Turn
on the vacuum
pump.
At the beginning of
pumping,
loosen
the
maintenance
nut of
stop valve B a little to check
whether
the
air comes in
(the
sound
of the
pump
changes,
and the indicator
of compound
meter turns below zero). Then
fasten
the
maintenace
nut.
When
the
pumping
has finished,
close the Lo-lever of the
manifold
valve
completely
and turn
off the
vacuum
pump.Make
pumping
for 15
minutes or more and check that
the compound
meter
indicates
-76cmHg(-1Xl05Pa)
Loosen
and
remove the
cap of stop valves
A and B to open
stop
valve A
and B completely,
then fasten the cap.
Disassemble
the
charge hose from
the service
port
of stop
valve
A, and fasten
the nut.
7.2
Additional
Refrigerant
Charge
CAUTION
Refrigerant
cannot
be charged
until field
wiring
has been
completed.
Refrigerant
may
only
be charged
after
performing
the leak
test and
the vacuum
pumping.
When
charging
a
system,
care shall
be taken
that its
maximum
permissible
charge
is never
exceeded,
in view
of
the danger
of liquid
hammer.
Charging
with
an unsuitable
substance
may
cause
explosions
and
accidents,
so always
ensure
that the
appropriate
refrigerant
is charged.
Refrigerant
containers
shall be
opened
slowly.
Always
use
protective
gloves
and
protect
your
eyes when
charging
refrigerant.
r
The
outdoor
unit is factory
charged
with
refrigerant.
Calculate
the
added refrigerant
according
to the
diameter
and the
length
of the
liquid
side
pipe
of the outdoor
uniVindoor
unit
connection.(suitable
for throftle
outdoor
unit)
R(g):
Additional
refrigetant
to
be charged
L(m): The
length
of the refrigerant
pipe(one-way)
D(mm):
Liquid
Side Piping Diameter
NOTE
lf
a negative result
is
gotten
for R from
Table
7-4, no
refrigerant
needs
to be added
nor removed.
Additional
refrigerant
will
be twice
of R from
Table 7-4
if
the indoor
unit installed
throttle
assembly.
Outdoor
unit is
equiped
with a drain
piping.
lts
position
is
shown figure
below
a'^i
Y
Outdoor
u1L
4
Gassrd
unit
'
-
-:---l--gn
ffi
y'B
Stop valve
Multi-meter Pressure meter
Fig.7-8
-76 cmHg
Lo-lever
Hi-lever
Charge hose
* /
Vacuum
pump
tr, f
m,
seruice
port
Table
7-5
ffi
I
ffi
-l
A
B
Drain
Piping
LGlever
Charge hose
Fig.7-9
Fig.7-10
installation
manual
14