An air conditioner coil can be a perfect breeding ground for mold and bacteria. This mold and bacteria buildup on a coil can cause a variety of indoor air and other problems. What to do? Glad you asked.
Dirty Sock Syndrome started appearing a decade or more ago. Since then, people have tried to figure out the source and what to do to solve the problem. A couple of companies have developed coating solutions.
Condensing temperatures often give technicians valuable hints as to what the problem may be within a refrigeration system. The high side of the refrigeration system offers valuable information to the wise technician.
The core of a refrigeration system is the compressor that is designed to pump cool refrigerant gas from the evaporator into the condenser. Refrigeration compressors need to be properly maintained and require periodic inspection and testing.
In our approach to humidity control for air conditioning systems, we must not overlook one very basic fact: If the evaporator coil is not cold enough, it cannot remove moisture, and it will stop removing moisture at its dewpoint temperature.
Manufacturers purposely design condenser and evaporator coils to work together in order to provide the best possible cooling for an application. So why would anyone consider replacing one coil and not the other? Why would anyone be tempted to oversize or undersize one component when the other isn’t designed for that capacity?
Potential or “voltage” relays are used with single-phase capacitor-start/capacitor-run motors, which need relatively high starting torque. Their main function is to assist in starting the motor. Knowing the sequence of operation for this type of starting relay can help you diagnose, confirm, or rule out certain service problems.
The big push is on to replace R-22 unitary air conditioners and heat pumps, and it looks like the industry has really and truly decided that R-410A systems are “it.” This article offers an overview of some of the issues related to R-22 and -410A in the field: operating pressure differences, oil characteristics, and temperature glide.