As heat energy is removed from a substance, its molecular activity will decrease; as heat energy is added, its molecular activity will increase. The intensity of this molecular activity affects the temperature of the substance.
The information is out in cyberspace when you need it, but you have to be willing to go get it. Becoming proficient in finding information when you need it can save you time and frustration on many jobs.
One common access valve initially used is some type of saddle valve. These valves are convenient and generally easy to install, but they are not usually considered to be a long-term type of valve and generally should not be left on a system permanently.
Keeping a system clean, dry, and tight really comes down to service technicians and how they handle installing or servicing a system. Here are some basic installation and service procedures that will ensure we always leave a system clean, dry, and tight.
An iced-up evaporator is a common service call for any service technician working in this industry. Generally, determining this is the cause of the system problem is rather easy. But what caused the evaporator to ice up may not always be obvious.
Fractional horsepower permanent split capacitor (PSC) fan motors are one of the most popular single-phase motors used in our industry, and then they fail, technicians must be able to troubleshoot and replace them.
The next time you’re faced with a choice of whether you should take some extra time and additional measurements, do the right thing. Take the time to do it right and find the true problem the first time.
A thermostatic expansion valve (TXV) is designed to maintain a specific amount of superheat at the outlet of the evaporator. If the superheat value is too high or too low, the TXV may be the cause. However, before deciding the TXV is defective, all other system causes must first be investigated and ruled out.
Verifying a diagnosis will take additional time, but this is time well spent. It will actually save time and money for both the technician and the customer by reducing the amount of callbacks and reducing the replacement of non-defective components on the job. It will also allow the technician to leave the job with peace of mind, knowing he has made a correct diagnosis.