TECHNICAL CHANGES
1
Refrigerating
oil
Refrigerant
New refrigerant
R410A
HFC-32: HFC-125 (50%:50%)
Pseudo-azeotropic refrigerant
Not included
A1/A1
72.6
-51.4
1.557
64
Non combustible
0
1730
From liquid phase in cylinder
Possible
Incompatible oil
Non
Non
Previous refrigerant
R22
R22 (100%)
Single refrigerant
Included
A1
86.5
-40.8
0.94
44.4
Non combustible
0.055
1700
Gas phase
Possible
Compatible oil
Light yellow
Non
Refrigerant
Composition (Ratio)
Refrigerant handling
Chlorine
Safety group (ASHRAE)
Molecular weight
Boiling point (
:
)
Steam pressure [25
:
](Mpa)
Saturated steam density [25
:
](Kg/
K
)
Combustibility
ODP
w
1
GWP
w
2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell
w
1 :Ozone Destruction Parameter : based on CFC-11
w
2 :Global Warmth Parameter
: based on CO
2
INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT
• This room air conditioner adopts an HFC refrigerant (R410A) which never destroys the ozone layer.
• Pay particular attention to the following points, though the basic installation procedure is same as that for R22 conditioners.
1
As R410A has working pressure approximate 1.6 times as high as that of R22, some special tools and piping parts/
materials are required. Refer to the table below.
2
Take sufficient care not to allow water and other contaminations to enter the R410A refrigerant during storage and
installation, since it is more susceptible to contaminations than R22.
3
For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 2. Refrigerant
piping.)
4
Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent
composition change.
MU-A07WV-
➔
MU-A07YV-
MU-A09WV-
➔
MU-A09YV-
1. Outdoor heat exchanger has changed.
2. Outdoor fan motor has changed. (RA6V23-FC
➔
RC6V20-AC)
MU-A12WV-
➔
MU-A12YV-
1. Outdoor heat exchanger has changed.
2. Outdoor fan motor has changed. (RA6V33-DC
➔
RA6V33-FC)
E1
E1
E1
E1
E1
E1
Revision A:
•MU-A12YV -
can be connected to MCF-A12WV -
.
SPECIFICATION and PERFORMANCE CURVES have been added.
E1
E1
2
OB330-1.qxp 04.3.2 0:57 PM Page 2
