What preventative maintenance should I perform on my environmental test chamber's refrigeration system?

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 support@associatedenvironmentalsystems.com 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 support@associatedenvironmentalsystems.com.