Service & Maintenance

Btu Buddy 20: A Training Lunch With Btu Buddy

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In this edition of the Btu Buddy series, Bob and Btu Buddy meet for a training lunch after the previous day's low oil in the sight glass service call. Btu Buddy discusses oil and oil circulation in an A/C system.
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Electric Motor Brake Horsepower Calculations

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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

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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

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

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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

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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

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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

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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

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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

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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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