Bitzer BSE32 Manuel page 27

the properties of the oils. Precondition for the use of alternative oils is that the manufacturer or supplier guarantees
product quality and moisture content < 50 ppm.
BITZER will only use BITZER polyolester oils for the complex tests of compatibility with new materials and refriger-
ants. In case of material changes on products, only BITZER polyolester oils will be included in the tests.
Low GWP refrigerants: stricter requirements for refrigeration systems
Many refrigerant blends with low global warming potential (GWP) such as R448A, R449A, R450A, R452A and
R513A contain the unsaturated compounds R1234yf and R1234ze(E). Part of them are highly soluble in oil and
lead to a strong reduction of viscosity. Therefore, sufficient superheat has to be ensured! The low chemical stability
(which is desirable for a low GWP) requires particular care regarding cleanliness, dryness and evacuation of the re-
frigerant circuit.
Material safety data sheets
Apart from this document, please observe the material safety data sheet (MSDS) for the respective oil. It contains
information on toxicity, handling, personal protective equipment and disposal of the oil. Material safety data sheets
for all BITZER oils are available on request .
Application range
Oil suitable e.g. for
refrigerants
BSE32 R134a
t ≤ 70°C R513A
c
R1234yf
R450A
R404A
R448A
R449A
R452A
R407A / F
R407C
R507A
BSE55 R1234ze(E)
t ≤ 70°C
c
BSE55 R134a
t even > 70°C R513A
c
R1234yf
R450A
R407C
R410A
BSE85K R1234ze(E) at t
Other refrigerants: special application after consultation with BITZER Application Engineer-
ing.
Tab. 2: Application range of polyolester oils (POE) for HFC and HFO refrigerants in BITZER reciprocating compressors. For application limits
see also BITZER SOFTWARE.
t : evaporation temperature
o
t : condensing temperature
c
(✔): after consultation with BITZER Application Engineering
KT-500-9 // PDF Download
cooling with t ≤
o
25°C
✔
✔
– –
– –
– –
– –
✔
✔
– –
– –
> 15°C or t > 70°C.
o c
Application range
air condition- medium tem-
ing perature ap-
plication
✔
✔
(✔)
✔
(✔)
✔
✔
✔
✔
✔
low temperat-
ure applica-
tion
✔ (✔)
✔ – –
✔ ✔
✔ – –
✔ ✔
✔ – –
✔ (✔)
✔ – –
✔ – –
✔ (✔)
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