Service & Maintenance

Things the Motor Nameplate Does Not Tell You

March 5, 2007
When choosing a replacement motor, you can often use the motor's nameplate to help you in making the selection, but a nameplate doesn't always provide you with everything you need to know.
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Btu Buddy 47: How Air Gets Into a Hot Water Heating System

February 19, 2007
In this edition of the Btu Buddy series, Part 2 of the previous article, Bob returns to the motel that had a heating problem to determine how air got into the closed loop piping system.
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Is It the Drive, the Motor, or the Load?

February 5, 2007
In troubleshooting situations involving a motor, more than half the battle is simply isolating the problem. So when problems arise, how can you tell if it is the drive, the motor, or the load? Here are a few tips.
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Btu Buddy 46: Air in a Hot Water Heating System

January 22, 2007
In this installment of the Btu Buddy series, the dispatcher sends Bob to a motel that is five stories high with the complaint that the top floor does not have any heat. Bob discovers air in the hot water heating system.
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Commercial Refrigerator Troubleshooting

January 8, 2007
Here are some tips for your next commercial refrigerator troubleshooting call. This article provides tips for various conditions, including handling a unit that’s dead, that’s freezing up, or that might have a compressor problem.
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Btu Buddy 45: Grounded Electric Heat Coil Causes Fan to Run

December 25, 2006
In this edition of the Btu Buddy series, Bob goes on a call where a heat pump indoor fan motor is coming on from time to time even when the thermostat is off. He finds that a grounded heat coil is causing the intermittent fan operation.
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A Guide to Understanding HVAC Filter Maintenance

December 11, 2006
Proper HVAC filtration is at the heart of indoor air quality. Filters will only do their job and perform as specified, however, when they are maintained correctly.
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Btu Buddy 44: Stolen Outdoor Unit for a Heat Pump

November 22, 2006
In this installment of the Btu Buddy series, Bob finds that a small retail store using a heat pump has had the outside unit stolen, most likely for the copper. He then moves on replacing the unit and preventing this from happening again.
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HVAC Service Tips for New Technicians

November 13, 2006
This article, written by an industry veteran, provides some general HVAC service techniques picked up over the years. It's designed to help technicians who are just starting out in the trade.
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Btu Buddy 43: A Smoking Oil Furnace

October 23, 2006
In this edition of the Btu Buddy series, a customer smells smoke coming from her oil furnace. Bob checks it out and finds that the furnace is not drafting. He inspects the chimney and discovers an obstruction.
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