SUMMARY
This article provides you with detailed information about chiller system microprocessor programming and review. We provide you with everything you need to know about the PSG microprocessor controller.
SYMPTOMS
Need to review or update the programming of chillers microprocessor controller
CAUSE
When adding glycol to the chiller loop or in some instances during startup or service review or adjustments need to be made to the microprocessor programming.
RESOLUTION
********* Important Update ********
On 12-31-15, PSG Controls (makers of chiller controls from 2000 to 2012 for both Legacy and Drake brand chillers) went out of business. As a result, replacement parts for this process chiller control system are expected to run out in 2016.
As of 1-1-2013, Legacy Chiller Systems has developed a retrofit package for the PSG process chiller control system. For more information CLICK HERE
The Legacy microprocessor controller provides a review and programming (or update) function accessible from the controllers touch pad. The attached service bulletin provides information on review, programming as well as other useful information.
APPLIES TO
All models with PSG microprocessor controller – All software versions
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