5
3-2. Use R410A exclusive cylinder only.
When charging with a refrigerant cylinder, use an
electronic scale for charging refrigerant. In this
case, if the volume of refrigerant in the cylinder
becomes less than 20% of the fully-charged
amount, the composition of the refrigerant starts
to change. Thus, do not use the refrigerant if the
amount in the charging cylinder is less than 20%.
Also, charge the minimum necessary amount to
the charging cylinder before using it to charge the
air conditioning unit.
Valve
S
in
g
le valve
Char
g
e liq
u
id refri
g
era
n
t with
cyli
n
der i
n
u
p-
s
ide-dow
n
po
s
itio
n
.
S
in
g
le valve (with
s
i
p
hon tu
b
e)
Char
g
e with cyli
n
der i
n
n
ormal po
s
itio
n
.
Liq
u
id
Valve
Liq
u
id
Confi
g
uration and characteri
s
tic
s
of cylinder
s
Fi
g
. 1
Fi
g
. 2
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