Service & Maintenance

Kitchen Ventilation: Baffled by Filters?

By Brian Rivet
No Comments
It is important to understand grease extraction and new options in capturing grease particulate efficiently near the source. A commonly overlooked byproduct of many cooking processes is grease — overlooked, that is, until it causes problems at a restaurant facility.


Read More

Btu Buddy 102: Continuing the Inspection of Multiple Split-System Heat Pumps

By Bill Johnson
No Comments
Bob and Tim are on the second day of an inspection of an apartment house building that has multiple split-system heat pumps. They have inspected all 60 outdoor units on the roof. They are now going to inspect the indoor units.


Read More

Troubleshooting Challenge: A Heat Pump That Won’t Cool

By Jim Johnson
No Comments
In this troubleshooting situation, the equipment you’re servicing is a 240-volt, single-phase split system in a small office, and the customer’s complaint is that the system is blowing warm air.


Read More

Btu Buddy 101: Bob Trains Tim on His First Service Call

By Bill Johnson
No Comments
Bob and Tim have arrived at Tim’s first service call. Tim asked Bob, “What is this call all about?” Bob said, “This is a new customer that wants us to take over the maintenance work for this apartment house.”


Read More

Beyond the Flange

By Richard Grenz
No Comments
In a previous article on chilled water systems we focused on maintenance of the “heart” of the system, the chiller.


Read More

Btu Buddy 100: Dual-Voltage, Nine-Lead Motors

By Bill Johnson
No Comments
Btu Buddy has met Bob for lunch to answer some questions that Bob had about yesterday’s service call. Bob asked, “Why did that motor have two contactors and so many wires going to it? It seemed very confusing. I am glad that I tagged those motor leads when I disconnected the motor. I never would have figured out how to reconnect the leads.”
Read More

Troubleshooting Challenge: An Ongoing 'Not Cooling Enough' Complaint

By Jim Johnson
No Comments
In this troubleshooting situation you have inherited a service problem that goes back to last year’s cooling season… residential HVAC equipment that’s seven years old with a lot of history, and repeated trips in response to complaints that this split system that employs a horizontal, attic-installed gas furnace “just won’t keep the home comfortable.”
Read More

Btu Buddy 99: Large Compressor Motor Grounded

By Bill Johnson
No Comments
Bob got a call to go to a convention center where the air conditioning system was not working. It was a 75-ton unit with one compressor. The system was many years old, but had been functioning fine, until now. After checking out the unit, an ohm check showed 0 resistance to ground.
Read More

Troubleshooting Power Problems on HVAC Equipment

By Wade Thompson
No Comments
A variable frequency drive (VFD) fails to vary the discharge-air fan speed. A motor overheats and fails prematurely. While each troubleshooting problem in an HVAC system presents its own unique set of circumstances, HVAC professionals may recognize such problems as possible power quality issues.
Read More

Btu Buddy 98: Compressor With Internal Leak

By Bill Johnson
No Comments
Bob has received a call from the dispatcher about a system that is not cooling. The job is a small building with a 5-ton cooling unit. Bob went to the outdoor unit. It was running and all appeared normal. He went to the truck to get his gauges, and when he got back, he noticed that the compressor didn’t seem to be running.
Read More

Multimedia

Videos

Image Galleries

2014 Energy Efficiency Forum

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

Podcasts

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.

More Podcasts

ACHRNEWS

NEWS 09-01-14 cover

2014 September 1

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe

Venting R-22

The NEWS reported that a man received prison time for venting R-22. Should EPA step up enforcement?
View Results Poll Archive

HVACR INDUSTRY STORE

plumbing-hvac.gif
2014 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