Sanyo MDF-U500VX - Cooling Unit Repair; Refrigerant Handling Procedures

- 40 -
1. Preparation
* Refri
g
erant
[
MU-N400
]
* Connector for char
g
in
gp
i
p
e
(
if necessar
y)
2. Procedure of collecting refrigerant
1
)
Evacuate re
g
ri
g
eration circuit for a
pp
rox. 5min.
b
y
usin
g
vacuum
p
um
p
.
<NOTE>
Must be
p
erformed evacuation to avoi
d
causin
g
fire b
y
residual refri
g
erant
(
R-600
)
in the circuit.
2
)
Connect char
g
in
gp
i
p
e.
Measure wei
g
ht of tank
p
rior to char
g
e refri
g
erant.
Ensure to connect tank with both vacuum
p
um
p
and
g
au
g
e manifold.
Pull vacuum for 3 hours at least.
Pum
p
ca
p
acit
y
: 300L flow/min.
<Measure we
g
ht of tank>
<Connections of tank,
g
au
g
e manifold,
p
um
p
>
<Evacuation of refrigeration circuit>
Repair of cooling unit