SERVICE MANUAL |
HFC |
No. OBR01 |
utilized |
|
|
|
|
|
|
R410A |
|
R410A REFRIGERANT
CONTENTS
1.INFORMATION FOR THE AIR CONDITIONER
WITH R410A REFRIGERANT ·············
2.TOOLS DEDICATED FOR THE AIR CONDITIONER WITH R410A REFRIGERANT ·3
3.REFRIGERANT PIPING ················
4.REFRIGERANT OIL··················
5.ADDITIONAL CHARGE ···············BA
NOTE:
This service manual describes treatment of the air conditioner with R410A refrigerant.
1. 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.
1As 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.
2Take 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.
3For refrigerant piping, use clean, pressure-proof parts/materials specifically designed for R410A. (Refer to 3. REFRIGERANT PIPING.)
4Composition change may occur in R410A since it is a mixed refrigerant. When charging, charge liquid refrigerant to prevent composition change.
Refrigerant
Refrigeration |
oil |
|
New refrigerant |
Previous refrigerant |
Refrigerant |
R410A |
R22 |
|
|
|
Composition (Ratio) |
HFC-32: HFC-125 (50%:50%) |
R22 (100%) |
|
|
|
Refrigerant handling |
Pseudo-azeotropic refrigerant |
Single refrigerant |
|
|
|
Chlorine |
Not included |
Included |
|
|
|
Safety group (ASHRAE) |
A1/A1 |
A1 |
|
|
|
Molecular weight |
72.6 |
86.5 |
|
|
|
Boiling point (:) |
-51.4 |
-40.8 |
Steam pressure [25:](Mpa) |
1.557 |
0.94 |
Saturated steam density [25:](Kg/K) |
64 |
44.4 |
Combustibility |
Non combustible |
Non combustible |
|
|
|
ODP w1 |
0 |
0.055 |
|
|
|
GWP w2 |
1730 |
1700 |
|
|
|
Refrigerant charge method |
From liquid phase in cylinder |
Gas phase |
|
|
|
Additional charge on leakage |
Possible |
Possible |
Kind |
Incompatible oil |
Compatible oil |
|
|
|
Color |
Non |
Light yellow |
|
|
|
Smell |
Non |
Non |
|
|
|
w1 :Ozone Destruction Parameter |
: based on CFC-11 |
|
|
|
|
|
|
|
|||||||
w2 :Global Warmth Parameter |
: based on CO2 |
|
|
|
|
|
|
|
|||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
New Specification |
Current Specification |
|||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
The incompatible refrigeration oil easily separates from |
Since refrigerant and refrigeration oil are compatible each, |
|||||||||||||
|
refrigerant and is in the upper layer inside the suction muffler. |
refrigeration oil goes back to the compressor through the |
|||||||||||||
|
Raising position of the oil back hole enables to back the |
lower position oil back hole. |
|||||||||||||
Compressor |
refrigeration oil of the upper layer to flow back to the |
|
|
|
|
|
|
|
|||||||
compressor. |
|
|
|
|
|
Suction muffler |
|
|
|
|
|
|
Suction muffler |
||
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
Oil back hole |
|
|
|
|
|
|
|
||
Compressor |
|
|
|
Compressor |
|
|
|||||||||
|
|
|
|
refrigeration oil |
|
|
|
|
|
|
Oil back hole |
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
||||||||
|
|
|
|
|
|
|
Refrigerant |
|
|
|
refrigeration oil /Refrigerant |
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Saturated liquid pressure
3.5
R410A 3.0 R22
2.5
2.0
1.5
1.0
0.5
0.0
-0.5 -30 -20 -10 0 10 20 30 40 50 60 (:)
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/f [Gauge])
2
Loading...