Articles Tagged with ''ice breaker''

Ice Breaker: Advantages of Parallel Compressor Racks

Supermarkets Use Design to Cool Cases
By Joe Marchese
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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
By Joe Marchese
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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
By Joe Marchese
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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
By Joe Marchese
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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: High-Pressure Switches

Troubleshooting Compressor Shutdown Controls Requires Care
By Joe Marchese
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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
By Joe Marchese
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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
By Joe Marchese
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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: Relief Valves 101

Safety Device Helps Protect Equipment, Workers
By Joe Marchese
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Relief valves are used to release abnormally high pressure inside a vessel before that pressure causes the vessel to erupt. 


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Ice Breaker: The Last Steps of a Service Call

Leave a Lasting Impression on Your Customers
By Joe Marchese
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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
By Joe Marchese
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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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