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Instruction manual for CoolSafe
5.
To stop the freeze-drying process, close the vacuum valve and equalise the pressure by
opening the release valve at the back.
6.
Remove the material from the shelves.
8.5
Stopping the vacuum pump
Note
Keeping the pump at operation temperature and with open gas ballast valve
minimises the risk for harmful condensation of vapours in the pump.
Caution
Do not stop the vacuum pump during the freeze drying process!
Close the vacuum valve and let the pump run for a minimum of 45 minutes after the freeze-drying
has ended. This is to avoid any possible condenses remaining in the pump oil.
If the freeze dryer is used regularly during the week, it is recommended that the vacuum pump run
constantly with open gas ballast valve and closed vacuum valve.
8.6
Hints, tips and reminders
The selection of the appropriate sample container is important to ensure samples are dried
efficiently. Freeze drying emanates from the surface area of the sample, so the larger the
surface area in respect to its depth/thickness is a determining factor in the speed of the
drying cycle. "Never let the depth of sample exceeds its diameter" especially in vials, flasks
trays etc.
Maintain the vacuum pump regularly, oil changes must be made as per manufacturer's
instructions. Poor vacuum performance could mean contaminated oil.
Ensure all seals and surfaces are clean and properly seated to avoid vacuum leaks. Always
start the freeze dryer and the vacuum pump 30-40 minutes before use.
Keep the freeze dryer operational if you expect to use it more than once during the day.
9
Maintenance
9.1
CoolSafe freeze dryer
The air-cooled condenser must be cleaned minimum once a year. Use a vacuum cleaner and
remove any dust in the cooling ribs on the front.
Rubber valves, black O-rings and valves on the manifold and black O-rings on chambers should be
greased with an ultra-thin layer of vacuum grease and wiped off with a soft cloth every 3-4 months.
The rubber must appear shiny, smooth and without cracks. All silicone gaskets need only dust
removal (do not use any vacuum grease).
9.2
Vacuum pump
See the vacuum pump instruction manual for maintenance according to supplier's recommendation.
Maintenance for a vacuum pump in general will be to:
Check the oil volume and colour conditions regularly. The oil should be changed every 400-
500 working hours, more often if aggressive vapours have been pumped. Keep a Log book
01012016QA01
Item No. 700636
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