Technical Changes; Revision B - Mitsubishi Electric MUCFH-GA35VB Service Manual

Revision A :
• RoHS PARTS LIST has been added.

Revision B :

• The fan guard for MUCFH-GA 60VB-
1

TECHNICAL CHANGES

MUH-A12YV -
E1
1. Indication of capacity has been changed. (BTU base ➔ kW)
MUCFH-A18WV -
1. Indication of capacity has been changed. (BTU base ➔ kW)
MUCFH-A24WV -
1. Indication of capacity has been changed. (BTU base ➔ kW)
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 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 Destruction Parameter : based on CFC-11
w2 :Global Warmth Parameter
has been changed.
E1
➔ MUCFH-GA35VB -
➔ MUCFH-GA50VB -
E1
➔ MUCFH-GA60VB -
E1
: based on CO
2
E1
E1
E1
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
2
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