Service & Maintenance

Quick Facts: Evacuation

August 7, 2005
This article discusses the purpose of evacuating a refrigeration system and how low a vacuum is needed to properly evacuate a system.
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Btu Buddy 28: A Stopped Up Condensate Line

July 22, 2005
In this installment of the Btu Buddy series, Bob's customer has a major problem with a condensate leak. Btu Buddy assists in solving the problem and suggests what to do to prevent a reoccurrence.
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Checking Indoor Airflow

July 9, 2005
Indoor airflow in any air conditioning system is critical. Too much air and the customer suffers lack of dehumidification in cooling. Too little air in cooling may freeze the coil. Here are procedures on how to measure airflow.
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Btu Buddy 27: A Compressor With Internal Leak

June 25, 2005
In this edition of the Btu Buddy series, Bob's cooling system service call seems to be a classic case of low charge. With Btu Buddy's help, he discovers that it's actually a compressor problem.
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Quick Facts: Superheat And Subcooling

June 12, 2005
Supeheat and subcooling are two terms that every service technician should know. Here are some quick facts on what they are and why they're important.
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Noncontact Temperature Measurements Using IR Thermometers

May 27, 2005
Infrared (IR) thermometers make it safe to take surface temperature measurements of items like rotating, hard-to-reach, electrically live, or dangerously hot targets. For preventive maintenance tasks, they cut measurement time to almost zero with the ability to take a surface temperature reading in less than one second.
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Btu Buddy 26: Checking A Heat Pump With Dirty Indoor Coil

May 13, 2005
In this installment of the Btu Buddy series, Bob examines a heat pump system and finds the airflow is low. He discovers that the problem is a dirty coil.
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Avoiding TXV Trauma

April 30, 2005
To ensure maximum TXV performance, here are some tips on bulb mounting/location, brazing, valve orientation, external equalizer use, superheat adjustment, and troubleshooting.
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Btu Buddy 25: Changing A Four-Way Valve On A Heat Pump

April 15, 2005
To finish the job they were working on last week (see "Btu Buddy 24: Looking At A Heat Pump Drawing A Lot Of Power"), Bob meets Btu Buddy at the jobsite to change the heat pump's four-way valve.
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Energy Recovery Wheel Maintenance

April 1, 2005
The maintenance requirements of filters, blowers, and motors are well known, but familiarity with energy recovery wheels is not as high. Understanding and implementing maintenance requirements for energy wheels will improve performance, effectiveness, and the life of the wheel.
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2014 MCAA Annual Convention

Scenes from the 2014 MCAA Annual Convention in Scottsdale, Ariz.

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Kyle Gargaro, editor-in-chief of The NEWS, hosted the 2014 ACCA CEO Forum. At the event, six well-known, highly respected company executives, Gary Michel, Ingersoll Rand/Trane; Chris Nelson, Carrier Corp.; Chris Peel, Rheem Mfg. Co.; Rod Rushing, Johnson Controls; Brent Schroeder, Emerson Climate Technologies; and Doug Young, Lennox; provided individual industry outlooks and fielded questions directly from attending contractors. Listen to the entire event on the NEWSMakers podcast. Posted on April 14.

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