Pulling a good vacuum before charging a new system with refrigerant or after a repair is essential for the proper operation of an air conditioning system. In addition to the vacuum pump, a micron gauge is an essential tool.
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.
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.
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.
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.
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.
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.
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.
Photos from the 2013 ACCA Conference & IE3 Expo in Orlando, Fla.
Podcasts
Cade Clark, assistant vice president of government affairs for the Air-Conditioning, Heating & Refrigeration Institute (AHRI), gives a brief overview of the new version of the Shaheen-Portman bill, what AHRI thinks of the energy-efficiency legislation, and how it might affect the HVACR industry if it becomes law.
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