Articles by Joe Marchese

Ice Breaker: PTC Starting Relays

By Joe Marchese
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One type of starting relay used on fractional horsepower compressors is the positive temperature coefficient (PTC) relay. It performs the same function as a current relay or potential relay but in a much different manner.

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Ice Breaker: Taking Stock of Downtime

By Joe Marchese
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During the normal course of servicing and installing refrigeration systems, there are times when a technician will need to wait before proceeding to the next task. These downtimes do not need to be wasted time.
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Ice Breaker: Thinking Outside the Box

By Joe Marchese
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Repairing refrigeration and air conditioning systems is not always an easy task. Occasionally technicians will encounter multiple problems on one system. If all of these problems are not initially discovered and resolved, the unresolved ones could lead to problems and more costly repairs.
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Ice Breaker: Condensate Drain Lines

By Joe Marchese
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Technicians servicing refrigeration systems need to be knowledgeable in several different trades, one of which is plumbing.
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Ice Breaker: Servicing Special Systems

By Joe Marchese
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Our industry has many different types of specialized refrigeration and air conditioning systems. Servicing and maintaining these systems normally requires a higher level of expertise than generic systems. Depending on the application, these systems can operate quite differently from generic systems.
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Ice Breaker: Simplifying Component Wiring

By Joe Marchese
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To prevent miswiring, any time you need to replace an electrical component, draw a picture of the wiring connected to the component. Draw the picture so each of the individual wires are identified and shown exactly how they are landed on the component.
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Ice Breaker: Liquid ‘Push-Pull' Recovery Method

By Joe Marchese
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There are several methods that can be used to recover refrigerant from a system. The most common is the vapor recovery method. A faster method of recovering refrigerant is to remove the refrigerant in its liquid form. One method of recovering liquid refrigerant is the “push-pull” method.
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Ice Breaker: The Hopscotch Method

By Joe Marchese
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Many system problems encountered by technicians are electrical in nature. Either the problem is an electrical defect, such as a defective switch or motor, or it can be traced electrically to the system problem itself, such as an open low-pressure switch as a result of a low system charge. In order to be proficient in troubleshooting a system problem, a technician must be able to efficiently troubleshoot the electrical components of a system.
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Ice Breaker: Just Read the Material!

By Joe Marchese
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Many of the systems and replacement components used in our industry will come with some type of literature supplied by the manufacturer. This literature will usually contain useful information for a technician and it should not be tossed aside.
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Examining Recovery Cylinder Capabilities

By Joe Marchese
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Working with refrigerant recovery cylinders is a basic part of servicing refrigeration systems. Technicians need to work safely when handling these cylinders.
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NEWSMakers: Rajan Rajendran

Rajan Rajendran, newly appointed director of the Emerson Innovation Center, talks about the new $35 million facility and how it will function on the University of Dayton campus. Posted on Aug. 29.

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Prohibiting HFCs

EPA is proposing a rule that would prohibit some HFCs in select refrigeration applications. Do you agree with this move?
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