Martin-christ Beta 2-8 LDplus User Manual download pdf (Page 61)

Operating Manual Freeze Dryer BETA 1-8 LDplus / BETA 2-8 LDplus Maintenance and Service  61

7. Maintenance and Service

7.1. Maintenance

7.1.1. Ice Condenser Chamber

Before each start-up ensure that all water residue has been

removed from the ice condenser chamber. If necessary, wipe the

ice condenser chamber.

Before every drying process it is recommended to open and close

the drain valve once.

7.1.2. Heat Exchanger

A laminated heat exchanger is used to cool the refrigerant

compressed by the refrigerator. The heat exchanger is placed at

the back of the unit. In intervals of a few months it must be

checked for dust or dirt residues and cleaned if necessary.

Cleaning of the heat exchanger can be carried out best by

brushing, by using a vacuum cleaner from the outside or by using

compressed air from inside the unit.

Excessive dirt on the heat exchanger leads to a decrease in

performance and can lead to a failure of the unit!

Please note: The unit must not be turned upside down!

7.1.3. Vacuum Sensor VSP62/63

Please refer to the separate operating manual of the vacuum

sensor VSP62/63!

The VSP62/63 vacuum sensor is equipped with an internal Pirani

sensor, which utilises the thermal conductivity of gases. The

tungsten wire reacts with the components of the ambient gas,

which is why it only has a limited service life. Carbon-containing

substances, such as alcohol compounds in particular, extremely

reduce the service life.

The vacuum sensor is maintenance-free.

Remove any soiling on the outside with a cloth.

7.1.4. Rubber Valves

Special attention must be paid to the rubber valves. If the valves

are stiff, they must be dismantled, cleaned, slightly greased with

vacuum grease and reassembled.

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Martin-christ Beta 2-8 LDplus User Manual Page 61