Lubricating Oils (Choice And Recommendations Grasso Hp); Pre-Lubrication Oil System - GEA Grasso 5HP Manual De Instalación Y Mantenimiento

4.4

LUBRICATING OILS (choice and recommendations Grasso HP)

For lubrication of refrigeration compressors, several brands and types of specially
developed lubricating oils are on the market. The choice of oil depends not only
on its good lubrication properties (viscosity) and chemical stability at the opera-
ting conditions of the compressor, but also on the operating conditions of the
refrigerating plant (solidifying and floc point, solubility).
Grasso has tested and approved for use in its reciprocating-compressors the
brands and types of oil as listed in table below.
The choice of the lubricating oil depends on the operating conditions of the com-
pressor and refrigerant.
The oil viscosity should always be more than 10 cSt. Assumed is that the oil tem-
perature at the bearing surfaces = 15 K above crankcase oil temperature.
Remark
In contradiction with a normal refrigeration a plant, using NH
heat pump application running on NH
in the normal refrigeration plant ISO VG68 type of oil will do. The reason for using
a thicker oil is that at higher suction pressures a higher concentration of refrige-
rant solves in the oil resulting in reduced viscosity.
Find in the table below the oil(s) to be used for the application
Accepted oil types
4.5

Pre-lubrication oil system

Why pre-lubrication?
Pre-lubrication is necessary in situations listed below, in order to provide suffi-
cient lubricating oil at locations where this is most needed (oil pump, bearings,
pistons en piston rings) to ensure that any risk on 'dry running' is minimized or
even better eliminated. Dry-running of oil pump bearings pistons and piston rings
will initiate and after initiation worsen the wear of the parts mentioned and even-
tually even damage the crank shaft and cylinder liners or even more parts.
When pre-lubrication?
1.
0089505esp_Pre-release_8
22.03.2017
Nota!
Some oil types may be marketed under other names and/or designa-
tions; these oils can also be used, provided their identity can be pro-
ved beyond any doubt. Application of other/alternavive oils is not per-
mitted without the written consent of Grasso.
Brand Type designation
Fuchs Reniso C85E
CPI CP-1009-100
Before initial start-up
APÉNDICE; Información de los productos (IP)
LUBRICATING OILS (choice and recommendations Grasso HP)
needs a viscosity class ISO VG100 where
3
Refrigerant
R744 (CO
R717 (NH
Heat pump appications
For all other oils consult Grasso
as refrigerant, a
3
Food Grade
)
-
2
)
3
-
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