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Shumate’s specialized chiller technicians check, repair and provide maintenance service on all chiller systems.



To achieve maximum performance and efficiency of your chiller and chill water system, it is important to schedule preventative maintenance inspections in order to identify problems that may become serious and expensive. Shumate Mechanical has sales engineers who can survey your system and schedule an experienced chiller technician to perform maintenance tasks that include:

 Air & Water Cooled Chillers

  • Record suction & discharge pressures
  • Check super-heat and sub-cooling on refrigerant circuit
  • Inspect liquid level at site glass
  • Check for any unusual noise or vibration
  • Inspect and tighten electrical connections
  • Monitor and record amp draws on all electrical circuits
  • Inspect contactors for wear or pitting
  • Verify operation of thermostats and set points
  • Complete diagnostic logs at Chiller control panel
  • Inspect compressor oil levels
  • Inspect cleanliness of condenser coils
  • Pull the heads and check condenser tube cleanliness
  • Verify flow switch operation
  • Check condenser entering and leaving water temperatures
  • Check condenser and evaporator approach

In addition to the above inspection items, Centrifugal Chiller Maintenance includes the following:

  • Annual oil analysis
  • Inspect and record purge and pump out rate
  • Perform vibration analysis
  • Perform eddy current analysis
  • Inspect starter and verify transition
  • Verify operation of refrigerant monitor
  • Test oil heater



Chiller maintenance will improve efficiency, giving better control of the chiller and air conditioning making your system economical. One of our sales engineers can look over your system to establish whether making changes to your system, in addition to maintenance, will increase this efficiency. Some ways to do this would be:

  • Automating the chiller controls
  • Adding a variable frequency drive
  • Replacing compressor motor assemblies
  • Raising the chilled water temp
  • Reducing the condensing water temp