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.

A common cause of premature reciprocating compressor failure is overheating. A recip that is running too hot will surely fail before its time. A service tech should always look for this potential problem while servicing any refrigeration system.

Many times technicians will have the tendency to overcharge refrigeration systems. Many symptoms for other system problems look similar, but they are not exactly like an overcharge of refrigerant.

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.

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.

Contactors are nothing more than a coil and a set of contacts. An understanding of contactors can help prevent service blunders.

In this fourth installment of the Btu Buddy series, Bob catches a service call and goes through the procedure for properly cleaning a dirty condenser.

These tips apply to cooling towers, closed circuit coolers, evaporative condensers, and closed circuit industrial coolers. Proper winterizing, spring start-up procedures, and scheduled periodic maintenance will prolong the life of the equipment, and help ensure trouble-free performance.