3
TECHNICAL CHANGES
1
MUH-18RV -
➔
MUH-A18WV -
1. Refrigerant has changed. (R22
➔
R410A)
2. Refrigerant system diagram has changed.
• Compressor, stop valve and 4-way valve have changed.
• Diameter of stop valve has changed. (Gas:
[
15.88
➔
[
12.7)
• Accumulator has removed and high pressure receiver has been added.
3. Oil separator has been added.
MUH-24RV -
➔
MUH-A24WV -
1. Dimension of outdoor unit has changed.
2. Refrigerant has changed. (R22
➔
R410A)
3. Refrigerant system diagram has changed.
• Diameter of stop valve has changed. (Liquid:
[
9.52
➔
[
6.35)
• Accumulator has removed and high pressure receiver has been added.
MUH-30RV -
➔
MUH-A30WV -
1. Dimension of outdoor unit has changed.
2. Refrigerant has changed. (R22
➔
R410A)
3. Refrigerant system diagram has changed.
• Accumulator has removed and high pressure receiver has been added.
E1
E1
E1
E1
E1
E2
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.
OB322-1.qxp 03.11.13 4:06 PM Page 3
Summary of Contents for MUH-A18WV
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