From the October 2017 issue of HealthCare Business News magazine
His company, which manufactures chillers for all industrial and commercial fluid cooling applications, also offers an installation and operation manual on its website highlighting some best practices for chiller maintenance.
On a monthly basis, the recommendations call for checking the condenser coil inlets of an air-cooled chiller for foreign debris, visually inspecting the system for water leaks and proper tank level and listening for excessive vibrations or motor noise. Legacy Chiller Systems also recommends checking electrical connections and components, checking the fan and pump rotation to make sure they’re operating correctly and verifying compressor oil levels.
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In an emergency, the use of city water, from the local system, can be used as a stopgap solution should a chiller go down. The water in a typical chiller is usually around 48 degrees Fahrenheit, but it can be 70 degrees or more. The water that comes out of a tap is typically around 55 degrees Fahrenheit, so for a short period of time, that is good enough.
12 tips for success
For annual inspections, Legacy Chiller Systems offers the following 12 tips:
1. Tighten all electrical connection screws.
2. Check the glycol solution for cleanliness. Drain and refill with clean solution if excessive sludge or dirt is present. Flush the system prior to refilling.
3. Check motor amp draws and voltage supplies. Make sure they are within nameplate rating.
4. Check operating pressures of the refrigeration system.
5. Check super heat and sub cooling.
6. Inspect for leaks with a sensitive electronic leak detector.
7. Check for excess wear or burned contacts on motor starters. Replace if in doubt.
8. Wash out the condenser coils of an air-cooled system.
9. Check the operation of the safety devices and thermostat.
10. Ensure that the pipe insulation is dry and not broken down.
11. Check mechanical mounts and vibration isolators for wear.
12. Remove and clean the magnetic flow switch.
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