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When
the
multiple indoor units
are arranged,
in
order
to distinguish
the
connecting
systems
of
indoor
and outdoor
units, all
systems shall be named
respectively
and
recorded on the nameplate on the electronic
control box
cover
ofthe
outdoor
unit.
6.4
Precautions
against
refrigerant leak
1)
The
refrigerant
oftle
air
conditioner
is harmless
and
nonflammable.
2)
The
room for
the
air conditioner
shall have
an
appropriate
space.
In
case
of refrigerant
leak,
it
cannot go beyond the
critical
concentration.
In
addition,
necessary
measures can be
taksn.
3)
The
critical
gas
concentration hannless to the human
body
is 0.3
kg/m'.
4)
Confrm
the
critical
concentration according to the
following
steps and
take corresponding measures.
a)
Calculate the
filling
volume ofrefrigerant
(A[kg])
Volume of refrigerant
=
filling
volume
of
refrigerant before delivery
(see the nameplate)
+ refilling
volume of reftigerant
corresponding
to
the
length
ofpipe
B)
Calculate the
indoor volume (B
[m'])
(by
the
minimum volume)
A
[ke]
B
[m,
]
<
Critical
concentration:0'
3
[Kglm3]
Outdoor
uit
Fig. G2
Refrigerant Leak
5)
Measures against exceeding the
critical
concentration
a)
To reduce the
refrigerant
concentration
below
the
critical
concentration,
install
a
mechanical
ventilation
device
(for fiequent ventilation).
b)
Iffrequent
ventilation
cannot
be
performed, please
install
a
leak
waming
device
interlinked
with
the mechanical
ventilation
device.
iderlitrked with
the
mechaical ventilatio!
device
0A+
I
I
/tr/f
Indoor
unit
I
"
trtf
I
&
7tt
l\
1J
/\
J
\
)
()
Room of
refrige@t
leak
(Refiigmt
is
tully
lcaked)
\
" *.*rofvenrilation
.
(Ite
feak
waming dwig€ shall be instaled
h
the
grthqing
place
ofrefiig€rmt.)
.
;
Fig.6-3
Mechanical
Ventilation
Device
6.5
Handovertotheclient
l)
Hand over the Use
Manrial for
the
Indoor
Unit
and the
lnstallation Manuhl for
the Outdoor
Unit
to the
client.
2)
Explain
the contents
ofUse
and
Installation Manual
to the
client carefully.
I
14
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