Mitsubishi MSZ-GA60VA Service Manual download pdf (Page 2)

TECHNICAL CHANGES

Refrigeration

oil

Refrigerant

New refrigerant

R410A

HFC-32: HFC-125 (50%:50%)

Pseudo-azeotropic refrigerant

Not included

A1/A1

72.6

-51.4

1.557

Non combustible

1730

From liquid phase in cylinder

Possible

Incompatible oil

Non

Previous refrigerant

R22

R22 (100%)

Single refrigerant

Included

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 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 : based on CO

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.

NOTE : The unit of pressure has been changed to MPa on the international system of units(SI unit system).

The conversion factor is: 1(MPa [Gauge]) =10.2(kgf/

[Gauge])

New Specification Current Specification

The incompatible refrigeration oil easily separates from

refrigerant and is in the upper layer inside the suction muffler.

Raising position of the oil back hole enables to back the

refrigeration oil of the upper layer to flow back to the

compressor.

Since refrigerant and refrigeration oil are compatible each,

refrigeration oil goes back to the compressor through the

lower position oil back hole.

Compressor

Suction muffler

Oil back hole

refrigeration oil

Refrigerant

Compressor

Suction muffler

Oil back hole

Refrigerating oil /Refrigerant

Compressor

MUZ-A18YV - ➔ MUZ-GA50VA -

MUZ-A24YV - ➔ MUZ-GA60VA -

MUZ-A26YV - ➔ MUZ-GA71VA -

E1E1

1.Indication of capacity has been changed.(BTU base ➔ kW 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 been changed.

5.Shape of relay panel has been changed.

6.Signal of terminal block has been changed.

OB389 --1qxp 05.1.26 18:14 Page 2

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Mitsubishi MSZ-GA60VA Service Manual Page 2

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