Refrigerant Oil Characteristics - Daikin VRV Plus Series General Information Manual

Si33-003.book Page 173 Monday, June 25, 2001 9:06 AM
SiE33-003
3.2

Refrigerant Oil Characteristics

Main characteristics of ether oil are shown in the following table.
Type (maker)
Applicable refrigerants (Daikin
products) 1
Density (g/cm³)
Total acid number
(mgKOH/g)
Saturated moisture level (ppm)
Volume insulation resistivity (Ωcm)
Hydrolysis
(stability range)
Oxidation degradation
(stability range)
Moisture absorption
Solubility in refrigerant
1 : Applicability may differ in products of other manufacturers.
Moisture
The graph on the below shows how the moisture absorption (moisture level) changes over time in suniso,
Absorption
ester oil and ether oil.
Solubility in The graph on the below shows the oil solubility of different combination of refrigerant and chiller oil.
→ A combination of suniso and HFC refrigerant results in a separation of refrigerant and oil in almost the
Refrigerant
entire range. (No solubility)
→ A combination ether oil and HFC refrigerant remains dissolved in a wide range.
New Refrigerant R-407C
Refrigerant and Refrigerant Oil Characteristics
Synthetic oil
Ether oil
FVC68D
(Idemitsu Kosan)
R-407C
0.94
0.01
2000
13
3×10 or less
No degradation
0.03% or less
(As shown in graph below)
(As shown in graph below)
Temperature : 25˚C
Humidity : 45%
Oil quantity : 50cc
2000 Ether oil
100cc Beaker
1000 Ester oil
Mineral oil
0 50 100
Time (hr)
Separated
50
Ether oil and R410A
40
Dissolved
Suniso 4GS
30
and R-407C/R410A
20 Separated
Dissolved
10 Suniso 4GS and R22
0 Dissolved
10
Separated
20
30
40
Dissolved
Ether oil and R410A
50
Separated
0 10 20 30 40 50 60 70 80
Oil content (wt%)
100 90 80 70 60 50 40 30 20
Refrigerant content(wt%)
: http://splitoff.ru/tehn-doc.html
Mineral oil
Suniso 4GS
(NIppon Sun Oil)
R22
0.92
0.01
100
14
5×10 or less
No degradation
0.03% or less
(As shown in graph below)
(As shown in graph below)
200
(V1108)
Ether oil and R-407C
(soluble in entire range)
Suniso 4GS
and R-407C/R410A
Dissolved
Separated
90 100
10 0
(V1109)
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