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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