There are a number of inspection and maintenance tasks you should complete quarterly on your chamber's refrigeration system.
Start by inspecting the condition of the chambers:
- Site glass/oil level (during operation)
- Check for oil leaks/build-up around the system
- Check clearance for the condenser
- Make sure the air handler is tight and has no air leaks
- Check pipe insulation
- Check the condenser and evaporator fan operation
- Check captures, vibration eliminators, and all pipe supports
- Check for any frost buildup
If there is an issue with any of the above, take photos of the affected part(s) and send them to firstname.lastname@example.org for solutions.
Quarterly work must also be performed on the refrigeration system of an environmental test chamber. This work includes the following:
- Cleaning the condenser coil
- Check the evaporator and condenser fins, and make sure they are straight (there is a special fin comb for each kind)
- Cascade low stage static pressures and operating pressures
- Discharge, Suction, Liquid Line, and Net Oil Pressures (both stages): Service tech verifies refrigeration, making sure all pressures are correct and working properly
- High/Low-pressure safety checks
- Leak check all piping and fittings
- Low stage expansion tank operation
- Delta T for filter driers
Preventative maintenance is key to keeping an environmental test chamber operational for a decade or more. A properly maintained test chamber can even last 20-plus years.
We understand this is a long list and isn't always manageable to check quarterly, let alone annually. That's why AES offers chamber check-ups. If you're interested in having a chamber professional take a closer look, contact email@example.com.