Quote:
Originally Posted by Bugeater
That's pretty much what most of the other maintenance guys I work with do. The only thing that trips me up is trying to determine if a unit has a TXV or not. Sometimes you can't tell unless you open them up, and that isn't always an easy thing to do.
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It is always best to look. But if you can get model and serial you can also call your distrubitor and tech support of the manufacture and they can tell you. If you are doing maintenance in and or on a specific building it won't take long to find out.
This much I can tell you if it is 410 it will have an expansion valve or an R-22 that is a 13 SEER or higher it will have one as well. Most of the older units don't have them but if someone has changed a condensor and left the old coil then they should of added a TXV.
Here is something that I had to learn the hard way. That a load of people don't know. If you are working on an American Standard or a Trane and you have to change a compressor out. There are 2 line driers that look like mufflers on the side of the condensor where the lines come out of the coil and go back to the compressor.
I didnt know about those so I put a new line drier at the evaperator coil and it basicly made a restriction.
Are you working on anything other than residential split systems yet?