1
TECHNICAL CHANGES
2
INFORMATION FOR THE AIR CONDITIONER WITH R-410A REFRIGERANT
• This room air conditioner adopts R-410A of HFC refrigerant which never destroys the ozone layer.
Pay attention following points.
1
As R-410A working pressure is 1.6 times higher than that of R-22 of previous refrigerant, dedicated tools and piping are
required.
2
R-410A is more affected by water and contaminations than R-22. Keep R-410A away from water and contaminations during
storage and while installing.
3
Use clean dedicated piping materiales for R-410A only which are strong enough against R-410A pressure. Never use any
current pipes designed for R-22.
4
Composition change may occur in R-410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent
composition change.
Lubricant
Refrigerant
New refrigerant
R-410A
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
R-22
R-22 (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
New Specification
Current Specification
w
1 :Ozone Destruction Parameter : based on CFC-11
w
2 :Global Warmth Parameter
: based on CO
2
The incompatible lubricant 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
lubricant of the upper layer to the compressor.
Since refrigerant and lubricant are compatible each, lubricant
backs to the compressor through the lower position oil back
hole.
Compressor
Suction muffler
Oil back hole
Lubricant
Refrigerant
Compressor
Suction muffler
Oil back hole
Lubricant /Refrigerant
Compressor
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 • G) =10.2(kgf/
f
f
• G)
