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Sharp AY-X10CR User Manual

Sharp AY-X10CR
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AH/AY-X08CR
AH/AY-X10CR
AH/AY-X13CR
1.
Outline
1.
1
Refrigerant
R410A
(1)
Adoption
of
R410A
in
Air
Conditioners
In
1974,
it
was
pointed
out
that
ozone
layer
in
the
upper
stratosphere
(about
20
~
40
km
above
ground)
might
have
been
damaged
by
the
ozone
depleting
substances
such
as
CFC
(chlorofluorocarbon)
and
HCFC
(hydrochlorofluorocarbon).
Since
that
time,
many
countries
across
the
world
have
endeavored
to
take
countermeasures
against
the
ozone
depletion.
As
a
refrigerant
belonging
to
the
HCFCs,
the
conventional
refrigerant
(R22)
used
in
air
conditioners
also
tends
to
deplete
the
ozone
layer.
Therefore,
complying
with
the
provisions
of
the
international
regulations
(i.
e.
Montreal
Protocol
concerning
the
Ozone
Depleting
Substances)
and
national
laws
&
regulations
concerned,
it
is
necessary
to
replace
R22-with
other
types
of
refrigerant
which
do
not
deplete
the
ozone
layer.
A
refrigerant
composed
of
hydrogen
(H),
fluorine
(F)
and
carbon
(C),
is
called
an
HFC
and
does
not
deplete
the
ozone
layer.
One
HFC's
is
R410A
whose
pressure
is
about
1.6
times
higher
than
R22
and
whose
energy
efficiency
is
almost
comparable
to
that
of
R22
at
the
same
refrigerant
temperature.
(2)
Chemical
Characteristics
of
R410A
a)
Chemical
Stability
Like
R22,
R410A
is
a
chemically
stable,
less
toxic
and
not-flammable
refrigerant.
However,
as
in
the
case
of
R22,
the
specific
gravity
of
its
vapour
is
larger
than
that
of
air
and
should
it
leak
in
an
airtight
room
it
may
stay
at
a
low
level
and
cause
an
oxygen
starvation
accident.
It
may
also,
should
it
come
in
direct
contact
with
file,
cause
a
poisonous
gas
to
occur,
so
be
sure
to
handle
it
only
in
a
well
ventilated
area.
Table
1.
Comparison
of
Thermophysical
Properties
of
R410
and
R22
Composition
(wt%)
Molecular
weight
Boiling
point
(“C)
R410A
R22
R32/R125
(50/50)
R22
(100)
[6
SdStCi‘i
OS
[Vapor
pressure
@5°0,
MPa)_—_—+|
——~—itsSSSC*dC=C“‘(C#OON’WOC*’
‘Ozone
depletion
potential(ODP)
|
SiO
0.055
Source:
List
of
Thermophysical
Properties
complied
by
the
Japan
Sociery
of
Refrigeration
and
Air
Conditioning,
NIST
REFPROP
V5.10,
etc.
b)
Composition
Changes
(Pseudo-azeotropic
Characteristics)
R410A
is
a
pseudo-azeotropic
mixed
refrigerant
composed
of
two
constituents-R32
and
R125.
"Quasi-azeotropic"
condition
refers
to
a
state
in
which
the
dew-point
curve
and
boiling-point
curve-
gas-liquid
equilibrium
curves
(pressure
constant)
-almost
lie
on
top
of
each
other,
and
a
multi-constituent
refrigerant
having
this
chemical
characteristic
incurs
less
composition
changes
even
when
evaporation
(or
condensation)
as
a
phase
change
occurs.
Consequently,
even
when
refrigerant
leaks
from
the
gas
pnase
somewhere
in
the
piping
installation,
the
composition
of
circulated
refrigerant
incurs
less
changes.
Therefore,
R410A
can
be
treated
in
almost
a
same
manner
as
a
mono-constituent
refrigerant
like
R22
is
treated.
When
actually
charging
R410A,
however,
do
so
from
the
liquid
phase
side
by
taking
into
account
the
phenomenon
that,
when
put
in
a
cylinder,
the
composition
changes
a
little
between
gas
and
lquid
phases.
Pressure
Characteristics
As
shown
in
Table
2,
since
R410A's
vapor-pressure
is
about
1.6
times
higher
than
that
of
R22
at
the
same
temperature,
perform
installation/
service
with
special
toolsand
materials
which
are
exclusive
for
R410A
and
can
withstand
high
pressure.
2
Refrigerant
Temperature
(°C)
Source:
List
of
Thermophysical
Properties
complied
by
the
of
Refrigeration
and
Air
Conditioning,
Japan
Sociery
Table
2.
Comparison
of
Saturated
Vapor
Pressure
of
R410
and
R22
R22
R410A
0.30
0.70
1.35
0.81
4.15
2.60
NIST
REFPROP
V5.10,
etc.
50

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Sharp AY-X10CR Specifications

General IconGeneral
BrandSharp
ModelAY-X10CR
CategoryAir Conditioner
LanguageEnglish

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