To service an oil-free vacuum pump, you should periodically flush the pump to remove any accumulated moisture. If you assigned an oil-free pump to your freeze dryer during the first setup then all you need to do is select defrost at the end of a batch and the machine will automatically purge the vacuum pump. Reference page 21 of the Owner’s Manual for more details.

If you do not have access to the latest software and your pump requires manual flushing, here's how to do it:

1. Turn Off Pump: Disconnect the power cord to ensure the pump is not powered.
2. Disconnect Hose: Remove the vacuum hose from the pump to prevent any backflow of water into the pump during the flushing process.
3. Reconnect Power: Plug the power cord back into an outlet, preferably in an area where noise will not be an issue, as the pump may be loud during operation.
4. Run Pump: Turn on the pump and let it run for at least 5-7 minutes. This will pull air through the pump and help to dry out any moisture that has accumulated inside.
5. Discharge: During the dry flushing process, you may notice water or other discharge coming from the exhaust port of the pump. Place a paper towel under the exhaust port to catch any discharge.

Performing a dry flush after each batch of freeze drying is recommended to help extend the lifespan of your oil-free pump and prevent issues such as rusting of the bearings or loud operation noises.

For a visual guide on how to perform a dry flush on your oil-free vacuum pump, you can watch our instructional video: How to Dry Flush the Oil Free Pump.

If you encounter any issues during the service process or require further assistance, please reach out to us for support.