Articles by Joe Marchese

Ice Breaker: Diagnosing Failures in Refrigeration

Determining Why a Refrigeration System Is Not Operating Properly

Sometimes we over think both the easy and hard problems, making a true system issue more difficult than it really needs to be. 


Read More

Ice Breaker: Relief Valves 101

Safety Device Helps Protect Equipment, Workers

Relief valves are used to release abnormally high pressure inside a vessel before that pressure causes the vessel to erupt. 


Read More

Ice Breaker: Identifying, Choosing Proper Temp Sensors

There are Differences in this Basic Tool of the Trade
Not all temperatures sensors are created equal and not all instruments and controllers use the same type of temperature sensors. So the first step in troubleshooting or replacing this type of sensor is to first recognize the type of temperature sensor being used.


Read More

Ice Breaker: Suction Line Insulation

Elastomeric Material Means Condensation Prevention
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.


Read More

Ice Breaker: The Last Steps of a Service Call

Leave a Lasting Impression on Your Customers

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


Read More

Ice Breaker: Transformer Sizing and Calculating VA Capacity

Joe Marchese Explains How to Size a Step-Down Transformer

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. 


Read More

Ice Breaker: Water Regulating Valves

Choosing, Replacing, and Adjusting Water Regulating Valves Requires Patience

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.


Read More

Ice Breaker: Compressor Floodback

Troubleshooting Compressor Floodback Issues

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. 


Read More

Ice Breaker: Using Technology as a Service Tool

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. 


Read More

Ice Breaker: Hydrocarbon Refrigerants

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.


Read More

Multimedia

Videos

Image Galleries

2014 Energy Efficiency Forum

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

Podcasts

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.

More Podcasts

ACHRNEWS

NEWS 10-13-14 cover

2014 October 13

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe

EFFICIENCY STANDARDS

DOE has denied AHRI’s petition for reconsideration of walk-in standards. Is it getting harder to reach consensus on efficiency standards?
View Results Poll Archive

HVACR INDUSTRY STORE

2015.jpg
2015 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

More Products

Clear Seas Research

 

Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications, Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.

DON'T MISS A THING

Magazine image
 
Register today for complete access to ACHRNews.com. Get full access to the latest features, Extra Edition, and more.

STAY CONNECTED

facebook icontwitter iconyoutube iconLinkedIn i con