Articles Tagged with ''maintenance''

Troubleshooting Challenge: A Heat Pump That Won’t Cool

By Jim Johnson
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In this troubleshooting situation, the equipment you’re servicing is a 240-volt, single-phase split system in a small office, and the customer’s complaint is that the system is blowing warm air.


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Costly Repairs are Easy to Avert

Motor Insulation Tests Prevent Breakdowns
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In the warm summer season, cooling equipment operates at near peak capacity. If that equipment is used for critical building functions, any equipment downtime for whatever reason is unacceptable.
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Shaft Grounding Rings Help University Improve HVAC Motor Sustainability

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A preventive maintenance program at a leading New England Ivy League university demonstrates how the push for more sustainable building management has led to a growing awareness of a chronic, widespread problem for HVAC motors: electrical bearing damage.
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Btu Buddy 101: Bob Trains Tim on His First Service Call

By Bill Johnson
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Bob and Tim have arrived at Tim’s first service call. Tim asked Bob, “What is this call all about?” Bob said, “This is a new customer that wants us to take over the maintenance work for this apartment house.”


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Department of State Awards $14 Million Contract to Crockett Facilities Services

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Crockett Facilities Services Inc. (CFSI), a leading provider of facilities operations and maintenance, mechanical contracting, and HVAC services to government and commercial clients, announced that it has received a five-year, $14 million contract from the U.S. Department of State to provide facilities management, operations, and maintenance services to two commercial buildings located in Washington, D.C.


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Ice Breaker: A Hot Compressor

By Joe Marchese
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Replacing a compressor is neither simple for a technician nor inexpensive for the customer. Before replacing a compressor, a technician needs to ensure that it is truly defective. Unfortunately, sometimes good compressors get replaced as a result of a misdiagnosed problem.
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The Professor: Loss of Air Conditioning Cooling

By John Tomczyk
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For this column I want to discuss a real life situation regarding poor cooling in a residence and reduced airflow coming from the registers in the house. The air conditioner is a three ton (36,000 btuh), HCFC-22, split type, air conditioner with the A-coil in the plenum of the furnace located in the basement.
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Maintenance and Healthy IAQ: The Connection

By John R. Hall
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HVAC contractors tell their customers there are many reasons for properly maintaining their furnaces, air conditioners, ductwork, and add-on equipment. A well-running system is efficient and provides greater comfort while saving on energy costs. It is a no-brainer. But an added bonus is the healthy ramifications.
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Tips on Controlling Humidity Levels (and Mold)

By John R. Hall
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The good idea of sealing up a building to make it energy efficient had some unwanted side-effects. Lack of circulation or the inability of a building to breathe compounded the high humidity problem. Fortunately, the HVAC trade has remained a leader in providing information, answers, and products to combat the humidity problem.
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Btu Buddy 100: Dual-Voltage, Nine-Lead Motors

By Bill Johnson
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Btu Buddy has met Bob for lunch to answer some questions that Bob had about yesterday’s service call. Bob asked, “Why did that motor have two contactors and so many wires going to it? It seemed very confusing. I am glad that I tagged those motor leads when I disconnected the motor. I never would have figured out how to reconnect the leads.”
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