Technical Changes - Mitsubishi Electric MUZ-GA50VA Service Manual

1

TECHNICAL CHANGES

MUZ-A18YV -
E1
MUZ-A24YV -
E1
MUZ-A26YV -
E1
1.Indication of capacity has been changed.(BTU base
2.Outdoor electronic control P.C. board has been changed.
3.Noise filter P.C. board has been changed.
4.Length of fan motor lead wire has been changed.
5.Shape of relay panel has been changed.
6.Signal of terminal block has been changed.
MUZ-GA60VA -
E1
1.Compressor has been changed. (SNB130FLDH1
2.Outdoor electronic control P.C. board has been changed.
MUZ-GA60VA -
E2
1.Compressor has been changed. (SNB130FLEH1
2.Outdoor electronic control P.C. board has been changed.
3.Refrigerant circuit has been changed.
MUZ-GA71VA -
E1
1.Outdoor electronic control P.C. board has been changed.
INFORMATION FOR THE AIR CONDITIONER WITH R410A REFRIGERANT
• This room air conditioner adopts 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 air
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.
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 w1
GWP w2
Refrigerant charge method
Additional charge on leakage
Kind
Color
Smell
w1 :Ozone Depletion Potential
w2 :Grobal Warming Potential
MUZ-GA50VA -
E1
MUZ-GA60VA -
E1
MUZ-GA71VA -
E1
MUZ-GA60VA -
E2
SNB130FLEH1)
MUZ-GA60VA -
E3
SNB130FGBH)
MUZ-GA71VA -
E2
HFC-32: HFC-125 (50%:50%)
Pseudo-azeotropic refrigerant
From liquid phase in cylinder
: based on CFC-11
: based on CO
2
kW base)
New refrigerant
R410A
Not included
A1/A1
72.6
-51.4
1.557
64
Non combustible
0
1730
Possible
Incompatible oil
Non
Non
3
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