Video link: https://youtu.be/Gbod0DTzPzM
This video provides a comprehensive guide on how to conduct a leak test on your freeze dryer, starting with the most accessible parts and moving to more complex areas if the leak is not found.
Tools needed:
- Cloth or wipe
- Phillips head screwdriver
- Windex or carb cleaner
- Cup of water
Steps
- Check the door gasket: Begin by inspecting the door gasket for defects or debris that could prevent a proper seal. Clean or remove any obstructions found. If the gasket is damaged, it needs to be replaced.
- Inspect the vacuum hose connections: Ensure that the vacuum hose is hand-tight at both connections to the pump and freeze dryer. Check for the presence of the small black o-ring in the fittings, and if missing, replace it.
- Evaluate the drain valve and extension: Conduct a visual check of the drain valve for leaks. If necessary, remove the extension hose and test the valve with Windex or carb cleaner for leaks. Look for a spike in pressure to identify leaks.
- Perform a vacuum test: Start a vacuum test from the functional testing screen on the freeze dryer's interface. Make sure the chamber is clean, dry, and empty before starting. Observe the pressure readings to see where the freeze dryer bottoms out.
- Check for epoxy leaks: If no leaks are found in the door gasket, vacuum hose, or drain hose and valve, the issue may be an internal epoxy leak. Refer to the video titled "Diagnosing and Confirming Epoxy Leak" for further instructions.
- Report the findings: Once you've identified the leak, report the findings to your technician, who will provide the necessary parts for repair.
