Freeze-dryer Alpha 3-4 LSCbasic
8 Maintenance and service
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Version 11/2018, Rev. 1.9 of 01/12/2021
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Translation of the original operating manuel
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.
• Perform the first oil change after approximately 100 operating hours.
• The other oil changes depend on the operating conditions. In general,
an interval of 500 to 1,000 operating hours is sufficient.
• Please contact the Christ service department if you have any queries
(see chapter 7.3 - "Service contact").
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8.1.7
Vacuum system with a dry-running vacuum pump, type Edwards nXDS 10iC
The dry-running vacuum pump requires only minimal maintenance.
NOTE
Comply with the maintenance instructions of the manufacturer in the
separate operating instructions of the vacuum pump and silencer!
In addition, the following must be taken into consideration:
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, let
the components cool!
• Wear suitable protective clothes and gloves!
WARNING
Danger of poisoning/infection due to contaminated exhaust air
The exhaust air may contain harmful substances originating from the
product.
Contact with particles in the exhaust air (especially by inhalation) may
result in severe damage to health.
• Use a silencer with integrated filter elements or – depending on the
product
– guide the exhaust gases from the outlet of the vacuum pump
to a suitable treatment system in order to prevent the discharge of
harmful substances into the surrounding atmosphere! Compliance with
the national rules and regulations for the protection of the environment
must be ensured!
• Work on the vacuum pump must only be carried out by qualified
specialist personnel!
The number of operating hours of the vacuum pump can be monitored by
way of the LSCbasic control system (see chapter 6.4.1.2 - "Main window
"Options""/"Service"/"Operating hours" and "Vacuum pump oil change").
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