Service & Maintenance

Electric Motor Brake Horsepower Calculations

October 31, 2004
These motor calculations are useful wherever electric motors are used. These simple calculations can be used to solve motor installation and troubleshooting problems in a variety of applications.
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Btu Buddy 19: Compressor With Low Oil Level

October 14, 2004
In this installment of the Btu Buddy series, Bob encounters a compressor with very low oil level. Btu Buddy explains that the low oil level is a normal function of this system for this time of year.
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Understanding Heat Pump Sequence Of Operation

October 1, 2004
In order to service and troubleshoot an air-source heat pump system, a service technician must understand the unit's sequence of operation. Where the system varies from its normal sequence is a major clue to any problems.
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Btu Buddy 18: Compressor With Refrigerant Flooding Back

September 17, 2004
In this edition of the Btu Buddy series, Bob works on a system that is not cooling properly and finds that refrigerant is flooding back to the compressor. Btu Buddy aids in pinpointing and curing the problem.
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Maintenance Of Residential Split System Air Conditioners

September 3, 2004
This article provides some maintenance recommendations for technicians for their annual air conditioning system inspections.
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Btu Buddy 17: Examining A Cooling Tower Problem

August 21, 2004
In this installment of the Btu Buddy series, Bob works on a water-cooled chiller with a high-pressure control that has the unit off. Btu Buddy assists him in inspecting the cooling tower and finding the problem.
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Modern HVACR Service And The Contractor's Bottom Line

August 5, 2004
Contractors are facing increasing pressures to be more productive. Armed with the proper tools and knowledgeable staff, savvy contractors can overcome today's challenges.
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Btu Buddy 16: Troubleshooting A Water-Cooled Condenser

July 23, 2004
In this edition of the Btu Buddy series, Bob is called to a motel that is having a chiller problem. Btu Buddy guides him through his first job on a water-cooled unit.
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Determining Airflow Using A Voltmeter And Ammeter

July 9, 2004
Measuring airflow can be difficult and time consuming, but it can be useful to troubleshooters. An easy method of measuring the airflow through a system that uses electric heaters is provided here.
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Btu Buddy 15: Quickly Cooling A Hot Hermetic Compressor

June 25, 2004
In this installment of the Btu Buddy series, Bob encounters a hot hermetic compressor and learns how to troubleshoot and diagnose the system problem.
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