Specifications

Operating Manual Freeze Dryer ALPHA 1-4 LD-2 / 2-4 LD-2, Version 0203, Page 38
6 Maintenance
6.1 Vacuum Pump
For maintenance of the vacuum pump please refer to the enclosed instructions.
Additionally, we would like to emphasise the following points:
The oil level of the vacuum pump must be regularly checked using the inspection glass
(in case of continuous operation at least once a week). Top up oil to the required level
via the oil inlet. Due to the continuous operation with gas ballast oil consumption
cannot be avoided. For topping-up see the instructions for the pump.
The first oil change must be carried out after approx. 100 operating hours. Subsequent
oil change intervals depend on the operating conditions. In general, an oil change is
necessary after approx. 500 to 1000 operating hours.
The oil change should always be carried out with warm pump.
6.2 Exhaust Filter
If the unit is equipped with an exhaust filter (necessary if the exhaust gases cannot be
extracted into the open air or into a vent) take care that the condensate in the filter
does not rise too high. The condensate is drained using a waste oil drain screw at the
filter.
(Please refer to separate operating manual!)
6.3 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.
We recommend that the defrosting water valve is opened and closed before each
drying process.
6.4 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.