Articles by Joe Marchese

Ice Breaker: Suction Line Insulation

Elastomeric Material Means Condensation Prevention
September 2, 2013
The suction line of a refrigeration system is normally insulated with a flexible, closed-cell elastomeric material. Insulating the suction line is done to prevent condensate from developing and dripping off. It also limits the amount of heat added to the refrigerant as it travels back to the compressor.


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Ice Breaker: The Last Steps of a Service Call

Leave a Lasting Impression on Your Customers
August 5, 2013

How you handle leaving a job site is as equally important as how you handle arriving and conducting the repair or installation. 


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Ice Breaker: Transformer Sizing and Calculating VA Capacity

Joe Marchese Explains How to Size a Step-Down Transformer
July 1, 2013

A popular electrical component used on many control circuits is the step-down transformer. It is the power source for a separate lower-voltage circuit which typically controls the operation of a system. 


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Ice Breaker: Water Regulating Valves

Choosing, Replacing, and Adjusting Water Regulating Valves Requires Patience
June 3, 2013

They serve two purposes: They regulate water flow to maintain the system’s high-side pressure and stop the flow of water when the system cycles off so as not to waste water.


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Ice Breaker: Compressor Floodback

Troubleshooting Compressor Floodback Issues
May 6, 2013

Determining that a compressor has failed on a refrigeration system is normally a relatively simple procedure. But, discovering why the original compressor failed may not be as simple. 


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Ice Breaker: Using Technology as a Service Tool

April 1, 2013

There are many aspects of a technician’s job where a smartphone or tablet can be extremely useful. These devices allow a technician to search the Internet for technical information while on the job. 


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Ice Breaker: Hydrocarbon Refrigerants

March 4, 2013

Gone are the days of the three basic refrigerants: R-12, R-22, and R-502. Today’s technicians need to be well-educated on all of the refrigerants they encounter.


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Ice Breaker: Hand Tool Safety

February 11, 2013

Many careless injuries are the result of rushing to complete a task and not taking the necessary time to do it right.


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Ice Breaker: Choosing the Right Multimeter

January 14, 2013
When it comes to choosing a multimeter for servicing refrigeration systems, there are a lot of choices on the market. Careful planning should go into selecting the right meter.


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Ice Breaker: Taking an Oil Sample Without an Oil Plug

December 3, 2012
Checking the acidity and/or moisture content of refrigerant oil is one of the methods used to test if a refrigeration system is clean and uncontaminated. But how can you take an oil sample without an oil plug?


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