Articles by Joe Marchese

Ice Breaker: Customer Service is Imperative

Soft Skills Aptitude Needed to be a Better Technician

Having excellent customer service skills not only makes you a better technician — it makes you a better employee. 


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Ice Breaker: Advantages of Parallel Compressor Racks

Supermarkets Use Design to Cool Cases

For maximum efficiency, a bank of compressors should be connected to evaporators operating at similar temperatures. From an operational standpoint, cases of different evaporating temperatures can be connected to the rack; however, this causes a substantial energy loss.


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Ice Breaker: What Is a Ton of Refrigeration?

Dealing With Btu and System Capacity

A ton of refrigeration can be defined as the amount of heat removal to produce one ton of ice at 32° from one ton of water at 32°. But what else does it mean?


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Ice Breaker: Suction Line Pressure and System Capacity

Ways to Avoid Reduced Operating Capacity

An excessive pressure drop across the suction line will reduce the operating capacity of a refrigeration system.


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Ice Breaker: Gauging the Importance of the Service Ticket

Written Documentation an Important Part of Call

Techs may not see the importance of the service ticket, but they should, since it can be an accurate reflection of him and his work. 


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Ice Breaker: Brazing and Soldering Procedures Need Care

Tips for Working Safely with Torches

Refrigeration technicians need to use extreme care when working with torches during the brazing and soldering process. The flames of a torch can easily reach 3,000°F. At this temperature, serious damage can be the result of misuse and carelessness.


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Ice Breaker: High-Pressure Switches

Troubleshooting Compressor Shutdown Controls Requires Care

High-pressure switches are designed to shut down a compressor if the system’s high pressure rises above an unsafe level, not allowing the compressor to restart until the pressure returns to a safe level. 


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Ice Breaker: How to Size Replacement Cap Tubes

Replacing Because of Restrictions

One field problem frequently encountered with this type of metering device is that it can become plugged with system debris, causing a restriction. When this happens, the cap tube will typically need to be replaced.


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Ice Breaker: Evap. Pressure Regulators

A Look at Familiar Refrigerant Flow Control Device

Joe Marchese explains the refrigerant flow control device, which prevents the refrigerant pressure in an evaporator from operating below a minimum value, and discusses how to select the right one for the job. 


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Ice Breaker: What a Tripped Oil Pressure Control Means

Avoiding Compressor Shut Down

Any time an oil pressure control shuts down a compressor, the cause of the shutdown must be identified. The tripped control is a warning of another existing problem. Simply resetting the control will not solve the problem.


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2014 Energy Efficiency Forum

Highlights from the 25th annual Energy Efficiency Forum in Washington, D.C.

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NEWSMakers: Chris Mathis

Chris Mathis, president of Mathis Consulting Co. and vice chair of ASHRAE’s residential ad hoc committee, talks about ASHRAE’s exploration into the residential market. Posted on Oct. 17.

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