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.
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.
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.
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.
This article is a guide for identifying the most common problems encountered in fans and air-handling systems. This is often an "art" and not a "science" because many problems are subtle and hard to diagnose.
In this installment of the Btu Buddy series, the customer's building is warmer than normal. Btu Buddy notes that this system has capacity control. Bob finds that one of the solenoid valves is not working.
There are a variety of things that can cause air conditioning freezing. The first thing to do is see if the indoor (evaporator-air handler) fan and compressor are both running at the same time.
Current starting relays are used on single-phase, fractional horsepower motors requiring low starting torque. Their main function is to assist in starting the motor. Start and run capacitors can be used in conjunction with current relays to boost both starting and running torque.
In this edition of the Btu Buddy series, Bob is dispatched to a home with water on the basement floor around the air handler. He determines that there is a condensate drain problem and he recommends installation of a condensate pump.
Regardless of your experience, to troubleshoot the system it is essential that you have a solid understanding of the fundamentals of refrigeration - including the principles of superheat and subcooling. You also need to have the right tools and know-how to apply these principles to use the tool quickly and efficiently.
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