Articles by Joe Marchese

Ice Breaker: Fan Cycling Controls

Many refrigeration systems are installed using an outdoor air-cooled condenser. When these systems are installed in a climate where the outdoor temperature drops below 60°F, some means of preventing the condensing pressure from dropping too low must be incorporated into its design.
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Ice Breaker: A Hot Compressor

Replacing a compressor is neither simple for a technician nor inexpensive for the customer. Before replacing a compressor, a technician needs to ensure that it is truly defective. Unfortunately, sometimes good compressors get replaced as a result of a misdiagnosed problem.
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Ice Breaker: Read and Record

When a refrigeration system fails, many times the cause can easily be diagnosed. However there are occasions when the cause cannot easily be determined - either the true cause is unclear or the technician is unsure of a problem. How do you work through these jobs? One method used by some techs is to “read and record.”
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Ice Breaker: Testing Your Tools to Make Sure They Work

Accurately troubleshooting and repairing refrigeration systems requires technicians to use many specialty instruments. They base many of their diagnoses on what is read from these instruments. Relying on them to be consistently accurate day in and day out is a must. If these tools are inaccurate, more than likely the diagnoses will be inaccurate.
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Ice Breaker: Tricks of the Trade

While repairing refrigeration equipment, technicians sometimes come up with unique methods of solving problems. Many of these are used again and again and become known as “tricks of the trade.” When a bunch of technicians get together, they oftentimes enjoy sharing new tricks they learned or developed recently. It’s like a badge of honor.
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Ice Breaker: Oil Management

When multiple compressors are piped together with a common suction and discharge header - such as with the arrangement of a parallel rack configuration - oil return to each compressor is a major concern. Typical oil recirculation rates are dependent on three factors.
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2015 AHR Expo

Photos from the 2015 AHR Expo at McCormick Place in Chicago.

Posted: February 19, 2015

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NEWSMakers: Andy Patron
Andy Patron, partner with FMI Corp., discusses the impact a national labor shortage may have on the mechanical contracting industry. Posted on March 27.
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