mycom i160M - Page 63

2203M4JE-MY-iS2-N_2017.04.
Chapter 4
Compressor and Package Unit Operation
Screw Compressor i-series 4.1 Lubricating Oil (Refrigerant Oil)
4-3
4.1.2.2 Oils for Systems Using Hydrofluorocarbon (HFC) Refrigerants

Polyolester Synthetic Oil (POE) for R404A and R507A: Compatible Synthetic Oil
Brand
Kinematic viscosity (40°C)
mm
2
/s
Manufacturer Type
SUNICE SL-68S 67 Sun Oil POE
EMKARATE RL68H 72 Lubrizol

Polyolester Synthetic Oil (POE) for R134a: Incompatible Synthetic Oil
Brand
Kinematic viscosity (40°C)
mm
2
/s
Manufacturer Type
JOMO Freol α100
107
JX
POE

When using lubricating oil of a brand not described in this section, or when using
 Lubricating oil
along with refrigerants or gases not described in this section,
please contact us.
4.1.3 Change of Lubricating Oil Brand
When changing the lubricating oil brand in currently use for some reason, attention must be paid to the
following points.
 The change of lubricating oil brand may cause problems in operating conditions and
the compressor. When changing the lubricating oil brand in use, make sure to
contact us because appropriate steps must be surely followed.
 Package unit composition differs depending on the characteristics of lubricating oil
(compatible/incompatible with refrigerant). As a general rule, changing compatible oil
to incompatible oil or vice versa is not allowed.
 Lubricating oil contains various additives to fulfill necessary lubricating conditions. Types of
additives and their mixing ratio depend on each oil brand. We, therefore, recommend to avoid
mixed use of different brands of lubricating oil. If mixed brands of lubricating oil are used, the
different additives in the lubricating oil may react with each other and produce foreign
substances like slurry.
 If it is necessary to change the brand of lubricating oil, collect as much as oil as possible from
the compressor as well as from the condenser, evaporator, and all other refrigerating unit
components before charging the new lubricating oil. After 100 to 200 hours of operation,
replace the oil again.
 If lubricating oil manufacturers differ, contact both of them and inquire whether the changing is
appropriate. The same confirmation is required for changing the brand even if it is of the same
manufacturer.
 There is no problem in changing the viscosity level within the same brand. However, make
sure that the viscosity grade will not cause problems during operation. (Example: SUNISO
3GS→SUNISO 4GS)