Troubleshooting PSC fan motors is a common task for service technicians, and failures tend to be either electrical or mechanical.

Over time, dirt, dust, pet dander, debris, and more accumulate in air ducts. And since the HVAC system works basically as a whole-home vacuum, all of that is recirculated through homes when the HVAC system runs, unless the ducts are cleaned out.

Trained to identify the varying types of asbestos used in old buildings, Matt Mountain of Mountain Duct Cleaning knows what he’s looking for.

HVAC contractors should be prepared to sell geothermal to new customers regardless of any incentives.

In this month’s troubleshooting problem, the equipment is a split system that’s approximately 8 years old.

Every year, The NEWS introduces the latest cooling equipment available for the upcoming summer season in order to help contractors prepare for this busy period by doing the research that will help them to distinguish between brands. The coverage features specific information about each individual product as submitted by the manufacturers.

The manufacturers provided all of the data included in the product grid as well as the photo feature. Therefore, any questions should be directed to them via the contact information provided in the photo feature section.

This heating showcase provides in-depth information on the features of each individual unit and also includes technical support information from the manufacturer. The manufacturers provided all of the data included in the product grid as well as in the photo feature; therefore, any questions should be directed to them via the contact information provided in the photo feature section.

Each year, The NEWS spotlights the industry’s latest commercial heating products. The manufacturers provided us with a brief description of features included with each product.

HVACR technicians are special individuals. They have the intelligence, aptitude, and knack for problem-solving. In fact, they are expected to know how to diagnose and troubleshoot equipment of all types, sizes, and ages.

Selling products online is a whole new ball game. So, contractors will want to learn about their consumers buying journeys, and thoughtfully consider how to launch the online store, what products to sell, and how to market it.

People are still pinching pennies and choosing repairs, but there are ways for contractors to sell new equipment, even when it’s more expensive.

Commercial heating equipment manufacturers are rolling out new systems that are energy efficient, as well as service friendly for contractors.

Low public awareness of incentives that can subsidize residential HVAC purchases means contractors have the opportunity to educate and position themselves as trusted advisors, marketing experts say.

In this showcase, The ACHR NEWS introduces the latest cooling equipment available for the upcoming summer season in order to help contractors distinguish between brands.

Every year, The ACHR NEWS introduces the latest heating equipment that is available for the upcoming winter season.

The equipment in this month’s troubleshooting problem is an electric furnace that has been in service for at least ten years and has no service history.

Every year, The ACHR NEWS introduces the latest heating equipment that is available for the upcoming winter season.

The ACHR NEWS visited Flame Furnace in Warren, Michigan to learn how to do maintenance and basic troubleshooting on a furnace.

Cold climate heat pumps were on full display on the AHR show floor and manufacturers were eager to share their progress reports in the Department of Energy’s CCHP Challenge.

Throughout March, voters will help the staff at Peterman Brothers select four charity partner organizations for 2023.

The residential heating showcase is designed to help HVAC contractors learn about the new heating equipment that is available for the upcoming cooler months.

Due to a lack of training, time constraints, and numerous other reasons, many HVAC contracting companies are not performing combustion testing, potentially compromising customers’ safety.

The residential heating showcase is designed to help HVAC contractors learn about the new heating equipment that is available for the upcoming cooler months.

In this episode we discuss with Randy Shoup, Distinguished Architect at eBay, about architectural pinciples and patterns used for building the highly scalable eBay infrastructure. The discussion is structured into four main ideas: partition everything, use asynchrony everywhere, automate everything, and design the system keeping in mind that everything fails at some point in a large distributed system.

With this episode, Software Engineering Radio begins a series of interviews on social/nontechnical aspects of working as a software engineer as Tobias Kaatz talks to Randy Shoup, former CTO at KIXEYE, about hiring in the software industry. Prior to KIXEYE, Randy worked as director of engineering at Google for the Google App Engine and as […]

Tobias Kaatz talks to former Kixeye CTO Randy Shoup about company culture in the software industry in this sequel to the show on hiring in the software industry (Episode 208). Prior to Kixeye, Randy worked as director of engineering at Google for the Google App Engine and as chief engineer and distinguished architect at eBay. […]

John Wilkes from Google talks with Charles Anderson about managing large clusters of machines. The discussion starts with Borg, Google’s internal cluster management program. John discusses what Borg does and what it provides to programmers and system administrators. He also describes Kubernetes, an open-source cluster management system recently developed by Google using lessons learned from Borg, Mesos, and Omega

Randy Shoup talks with SE-Radio’s Travis Kimmel about how to scale technology and organizations together, so that an organization can move faster as they grow (and not slow down). Their discussion covers how to effectively scale culture, process...

Adam Shostack of Shostack & Associates and author of Threat Modeling: Designing for Security discussed different approaches to threat modeling, the multiple benefits it can provide, and how it can be added to an organization’s existing software proc

Trisha Gee and Kevlin Henney of 97 things every Java developer should know discusses their book, which is a collection of essays by different developers covering the most important things to know. Host Felienne spoke withGee and Henney about all things...

Randy Shoup of eBay discusses the evolution of eBay's tech stack. SE Radio host Jeremy Jung speaks with Shoup about eBay's origins as a single C++ class with an Oracle database, a five-year migration to multiple Java services, sharing a database...

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There are thousands upon thousands of PC games out there, and hundreds of good ones. However, some have stood out over the years, and cemented themselves as absolute must-haves in their respective genres. These are 15 titles we feel every PC gamer should have in their digital library.... [PCSTATS]

Brent Simmons, the developer of the NetNewsWire RSS reader, is questioning his decision to put an unread count next to each feed, reasoning that it encourages people to be too obsessive about reading every item:

Instead of a dozen bookmarks, people had a hundred feeds. Or two hundred. Or two thousand.

And there was a tyranny behind keeping track of unread items and showing an unread count. People reacted in different ways, but many people felt like they always had to go through everything.

Including me. To this day.

I did not know this was going to happen. That was not the idea: it was a side effect of reasonable (at the time) choices.

I like seeing these counts on feeds where I need to read all items that are posted, but that's only a small percentage of the 100-120 feeds I follow. It would be nice to turn that off for others I read more casually.

Feedly presents unread counts on each feed and folder of feeds. There's a Mark As Read button to clear a count, but when you click it, the confirmation dialog acts like it's an extremely consequential decision: "Are you sure you want to mark this entire source as read? This operation cannot be undone."

I've posed a question on the RSS-Public mailing list: Do you think feed readers should count unread items?

Only a few localities nationwide allow voters to elect judges. What impact would democratizing judge selection have on the judiciary?

A criminal record keeps many qualified candidates out of work; these coffee companies are helping clear the first hurdle.

Sonya Massey's killing is a reminder that police do not keep Black women, nor Black disabled people, safe, says activist Cat Brooks.

Families have had to leave their homes and emergency services are helping people as they deal with the impact of the worst flooding in the country for many years.

Does it seem like there are more spiders around the house right now? And do the spiders you spot seem bigger than those you've seen in recent months? Spider expert, Dr Sara Goodacre, is here with some arachnid answers.

Electrical distribution systems comprise a large number of remote applications and locations, and it has traditionally been challenging to monitor and regulate these remote applications and sites. Utility companies have been installing remote terminal/telemetry units, often known as RTUs, at... Read more

The post Three most common SCADA applications in MV/LV distribution systems you SHOULD know appeared first on EEP - Electrical Engineering Portal.

Nowadays, HV/EHV substations have become pretty complex from the design point of view. Besides the main electrical equipment, which must be designed and selected correctly, there are several auxiliary facilities without which a substation would not be able to operate... Read more

The post The essential HV/EHV substation auxiliary facilities you should know about appeared first on EEP - Electrical Engineering Portal.

Measuring power quality and finding a bugbear in the network which is messing with the power are considered a highly paid job. Every electrical network and its problems with harmonics, transients, or disturbances are unique and need careful planning, setting... Read more

The post How to measure power quality? What devices should you use and what to measure? appeared first on EEP - Electrical Engineering Portal.

This technical article provides a collection of the common drawings that are sent by the manufacturer to the client for approval and reference. The goal of these drawings is to verify that the transformers that are going to be manufactured... Read more

The post Contract drawings for a power transformer – The checklist you should always follow appeared first on EEP - Electrical Engineering Portal.

Electrical systems normally use current and voltage transformers for protection and measurement purposes. They represent the power system’s eyes and ears, and it’s essential to fully understand how they work, how to make the correct specification and most importantly, the... Read more

The post What steps should be taken to avoid choosing the incorrect current and voltage transformers? appeared first on EEP - Electrical Engineering Portal.

Proper analysis of the VFD’s power and control circuit diagrams is essential for successful troubleshooting. But before starting any analysis, you must know how your system connected through VFD works and how it breathes. You must also know all components... Read more

The post Inside Variable Frequency Drive (VFD) Panel: Configuration, Schematics and Troubleshooting appeared first on EEP - Electrical Engineering Portal.

This article will analyze a real example of an electrical switchboard for a potable water well pump, containing a soft starter as one of the major components. Besides the explanation of the wiring diagram and working logic, some technical problems... Read more

The post Soft starter for potable water well pump (wiring diagram, troubleshooting example) appeared first on EEP - Electrical Engineering Portal.

"Candy Girl" sounds like a shoegazer's modern take on Berlin's "Take My Breath Away" — the song that soundtracked the makeout scene in Top Gun. Cool but still beautiful, it's touching, revealing and almost painfully intimate.

This approach assumes retrofitting and upgrading old substation secondary equipment such as intelligent electronic devices (IEDs), monitoring sensors, power apparatus, communication protocol and operating standards to improve the overall performance or reduce cost without disrupting the continuity of service. For... Read more

The post Secondary equipment you should always consider when retrofitting existing HV substation appeared first on EEP - Electrical Engineering Portal.

I was having lunch a few months ago when I suddenly struggled to get to the end of what I was saying- my voice dipped and wouldn't come back. Within a week or so, I couldn't produce any noise and was forced into a soundless whisper. If I strained a bit, I could just about make a sound that could possibly be heard at very close range. My first medical consultation did nothing, and I had tickets to go abroad that meant going with just this silent croak.