ENGLISH 20 / 78 CAP. 6 - MAINTENANCE
These types of oil must ensure:
• high viscosity index, which minimizes viscosity variations when temperature changes. This
means, in cold conditions, promptness and sensitivity of control and, at the same, time, in
warm conditions, stability of operation.
• Remarkable wear-prevention properties, ensuring a long life of moving parts.
• Excellent defoaming power, which limits noise level, irregular operation, impossibility of
reaching the final pressure.
• Great chemical stability, ensuring oil can be used for longer periods without causing
formation of oxidization products, such as mud and sludge.
• Strong rust preventive properties, which ensure effective protection of metal surface against
corrosion caused by the action of humidity present in the pumped fluid.
IMPORTANT
The described oils for vacuum are of mineral origin and, as such, are fuels. If during normal
use, the vacuum pump shall suck up mixtures containing oxygen above 21% or pure oxygen,
this would lead to oil oxidation and thus to a loss of lubricating properties, with significant
damage to the pump itself.
Physical and chemical properties
Physical status: Liquid
Appearance: Crystal clear (visual)
Odour: Typical pH in aqueous solution (conc.): Not applicable
Solubility in water: Insoluble
Density at 15°C kg/l: 0.890 (ASTM D1298)
Kinematic viscosity at 40°CcSt: 68 (ASTM D445)
Flammability point (COC)°C 220: ( A STM D92)
Pour point °C: -9 (ASTM D97)
6.3 DRYER FILTER CHANGE
The dryer filter shall be replaced once 45 kg of refrigerant fluid have been dehydrated, because the
filter depletes its capacity of retaining the moisture present in the refrigerant.
To replace the dryer filter, from the MAINTENANCE menu select DRYER FILTER REPLACEMENT:
press “RESET” to set the counter to zero and to start the filter replacement procedure.
Now you can replace the filter.
Required equipment:
• 1 Medium-sized cross-tip screwdriver
• 1 regular or torque Hex wrench (24 mm)
• 1 Hex key (17 mm)
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