Refrigeration 101

[moideen]

There has been a big move towards self-diagnostic systems in recent years, but as far as I know they haven't gotten it right yet... apparently their computers haven't learned how to subtract yet.

On the other hand, I am retired now, so maybe things have changed since then.

Hi gary sir
Before 25 years ago self diagnosing systems are in market!! Ex: carrier 30 GT chiller. Now all commercial chiller manufactures are designing self diagnosing based refrigeration fundamentals. Some sample alarms such as- low suction super heat, high saturation suction temperature, low discharge superheat…………….etc.
Your 101 is very useful, thanks a lot

Moideen-dubai

[Gary]

Before 25 years ago self diagnosing systems are in market!! Ex: carrier 30 GT chiller. Now all commercial chiller manufactures are designing self diagnosing based refrigeration fundamentals. Some sample alarms such as- low suction super heat, high saturation suction temperature, low discharge superheat…………….

Something like e.g. - low suction superheat - is a symptom, not a diagnosis. In my opinion, these systems are not self-diagnostic.

When they can say things like - insufficient evap airflow, or liquid restriction, or refrigerant overcharge, or inefficient compressor, etc, etc. etc... then I will be impressed.

[Gary]

Something like e.g. - low suction superheat - is a symptom, not a diagnosis. In my opinion, these systems are not self-diagnostic.

When they can say things like - insufficient evap airflow, or liquid restriction, or refrigerant overcharge, or inefficient compressor, etc, etc. etc... then I will be impressed.

BTW, I know this can be done. I wrote a program to do this back in the 1980's. Nobody was interested.

[nike123]

When they can say things like - insufficient evap airflow, or liquid restriction, or refrigerant overcharge, or inefficient compressor, etc, etc. etc... then I will be impressed.

Something like this:
http://www.ecotechnics.it/en/product...lock-2000.html

[Gary]

Something like this:
http://www.ecotechnics.it/en/product...lock-2000.html

Yep... something like that.

I had a couple diagnostic programs that I marketed on floppy disks back in the early 1990's. One for refrigeration and the other for A/C.

Crude but effective. Programmers would have a good laugh, but it told you what was wrong with the system.

Then they started putting USB connectors on printers and the printer function no longer worked. Started getting complaints that my programs wouldn't print the results, so I discontinued the products. I'm a service tech, not a programmer.

[eggs]

Yep... something like that.

I had a couple diagnostic programs that I marketed on floppy disks back in the early 1990's. One for refrigeration and the other for A/C.

Crude but effective. Programmers would have a good laugh, but it told you what was wrong with the system.

Then they started putting USB connectors on printers and the printer function no longer worked. Started getting complaints that my programs wouldn't print the results, so I discontinued the products. I'm a service tech, not a programmer.

Gary, do you still have copies of these programs?

Is there any chance of a copy?

Eggs