Articles by Joe Marchese

Ice Breaker: Troubleshooting Controller Inputs

November 12, 2012
Today more and more systems are incorporating microprocessor controllers into their design. Troubleshooting the operation of these controllers can be a little tricky at times, but if broken down into sections it can be easier to handle.


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Ice Breaker: The True Refrigeration Professional

October 1, 2012
I have always been impressed with the true refrigeration professional; the type of guy that not only is able to fix a problem, but also understands the why behind the problem. These guys are not satisfied with just knowing how to replace a failed component . They want to know why it failed.


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Ice Breaker: Troubleshooting Current Relays

September 3, 2012
One type of starting relay used on fractional-horsepower compressors is the current relay. A defective current relay can cause a compressor not to start. One popular method of troubleshooting this type of starting relay is with an ohmmeter.


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Ice Breaker: Maintenance as an Energy-Saving Tool

August 6, 2012
An effective means of building any refrigeration contracting business is to sell maintenance agreements. Maintenance agreements help to build a strong customer base and even out the workload throughout the year. Is there something else they do for a contractor?


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Ice Breaker: Creating an Electronic Library

July 2, 2012
Manufacturers are increasingly designing their systems with unique controls and features that may apply only to their systems. Servicing, installing, and maintaining these new systems can be challenging. Sometimes they require us to reference material provided by the system or component manufacturer. Without this reference material, servicing, installing, or maintaining many of these new systems may be quite difficult or at times even impossible. What is a contractor to do? 


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Ice Breaker: Compressor Short Cycling

June 4, 2012
Why does the rapid cycling of a compressor on and off cause it to fail? Rapid cycling can cause a compressor to fail in several different ways. Read on to find out some. 


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Ice Breaker: Refrigerant Safety

May 7, 2012
Technicians should make safety a first priority when working on any refrigeration system. There are many potential hazards associated with installing, servicing, and maintaining these systems. One of these potential hazards is the refrigerant within the system.


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Ice Breaker: Selecting Thermostatic Expansion Valves

April 2, 2012
One of the basic components selected when installing a walk-in cooler/freezer or any field-assembled refrigeration system is the metering device, typically the thermostatic expansion valve (TXV). The TXV needs to be selected to match the Btu capacity of the system’s evaporator and compressor.


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Ice Breaker: An Evaporator’s Temperature Difference

March 5, 2012
A well-designed medium temperature refrigeration system will maintain both a proper case temperature and relative humidity (rh). The preservation of food depends not only on the temperature, but also on the relative humidity within a case.


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Ice Breaker: Tips for Avoiding Callbacks

February 6, 2012
Contractors do not like to hear the word “callback.” They cost money and degrade a customer’s respect for and opinion of the service contractor. So how can a technician reduce the number of times he must revisit a repair? 


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