Freeze-dryer Epsilon 1-4 LSCplus
Freeze-dryer Epsilon 2-4 LSCplus
8 Maintenance and service
Version 07/2022, Rev. 3.0 of 20/07/2022
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Translation of the original operating manual
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8.1.6
Vacuum system with an oil-sealed vacuum pump
NOTE
Please refer to the maintenance instructions of the vacuum pump and
exhaust gas filter in the enclosed operating instructions of the
manufacturer!
WARNING
Risk of burns on hot surfaces
During the operation of the freeze-dryer and half an hour afterwards, the
outer surface of the vacuum pump may be hot.
There is a risk of burns when touching the surfaces.
• Prior to performing any maintenance work on the vacuum pump or the
oil mist separator, let the components cool!
• Wear suitable protective clothes and gloves!
WARNING
Risk of scalding caused by the vacuum pump oil
When working on the vacuum pump and exhaust gas filter (especially
when changing the oil or filter), the maintenance personnel are exposed to
the hot vacuum pump oil.
There is a risk of scalding in the event of skin contact.
• Wear suitable protective clothes and gloves!
• Use a suitable collecting vessel!
WARNING
Risk of poisoning/infection caused by the vacuum pump oil
When working on the vacuum pump and exhaust gas filter (especially
when changing the oil or filter), the maintenance personnel are exposed to
the vacuum pump oil, which may contain harmful substances originating
from the product. In addition, synthetic oils can release toxic fumes when
they are ignited or heated above 300°C.
The inhalation of the fums that are released by the oil, or contact with the
skin, can cause severe damage to health.
• Wear suitable protective clothes, gloves, and respiratory protection!
• Ensure the environmentally sound disposal of the oil in compliance
with the local rules and regulations!
• Do not let the oil come into contact with tobacco products!
The stress of the vacuum pump in conjunction with a freeze-dryer is usually
not very high. This is why the recommendations in this operating manual
may differ from the information that is provided by the pump manufacturers.
Under normal operating conditions, the following maintenance tasks
concerning the vacuum pump must be performed at regular intervals:
• Check the oil level of the vacuum pump once per week. If necessary,
top it up with oil.
• Check the running pump for any unusual noise.
• Ensure that the pump has reached its operating temperature prior to
changing the oil. If the oil is cloudy, shows particles or is discoloured, an
oil change must be performed.
• Perform the first oil change after approximately 100 operating hours.
