With one end of the building cool and one end warm, Bob and Btu Buddy discover an airflow problem. Find out how they track down the problem and repair the system.

'Plain Jane' Water For Hydronics ... Not So Plain

November 28, 2003

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Most hydronic systems are filled with "Plain Jane" tap water. However, today, more than ever, "Plain Jane" water may not be so plain. If you are not testing your fill water, you are guessing, and potentially compromising, the system.

Btu Buddy 8: Burned Four-Way Valve Coil On A Heat Pump

November 15, 2003

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In this edition of the Btu Buddy series, a heat pump's four-way valve is in heating mode when it should be cooling. Bob tracks down the valve problem.

The Essentials Of Working With R-410A

November 2, 2003

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The trend towards the use of refrigerant 410A continues to grow and there is a demand for technicians who are comfortable working with this higher-pressure replacement for R-22.

Btu Buddy 7: Changing A Badly Burned Compressor

October 20, 2003

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In this installment of the Btu Buddy series, Bob tackles a burned compressor. Review his procedure for cleaning up the system and replacing the unit.

Activated Carbon For HVAC Applications

October 5, 2003

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To totally "clean" indoor air, gases and vapors must be removed. For HVAC applications, activated carbon is commonly used. Why and how it is applied are detailed.

Btu Buddy 6: Removing Water From A Wet Heat Pump System

September 19, 2003

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In this edition of the Btu Buddy series, Bob is helping finish a job that a new construction crew installed. The installers left the gas line and liquid line on a heat pump turned up all weekend and it rained in the tubing. Bob must dry out the system.

The Importance Of Filter-Driers

September 5, 2003

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Filter-driers play a pivotal role in the operation of air conditioning and refrigeration systems. As important as the filter-drier is, many actually do not understand how it works. Here are some details.

Btu Buddy 5: A Conversation About Vacuum Procedures

August 23, 2003

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In this installment of the series, Bob stops at a diner for lunch and has something on his mind. He has been to school where all of the terms of pressure and vacuum have been discussed, but he does not have a firm grasp on the terms. He wants to better understand the evacuation of a system.

General Service Safety Precautions

August 7, 2003

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HVACR service personnel always need to think safety first when working on equipment. The information in this article is intended to provide an overview to assist in the safe service and maintenance of systems.

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