Quote:
Originally Posted by Chief Roundup
Don't trust anyone else in this business! There are to many people that think they know what they are doing simply because they have been doing it for 20 years.
If you know the series of operations and the flow of refrigerant you should be alright. Things just get bigger. Meaning 2 speed equipment, bigger tonage attained by multiple compressors and so on. Be sure to learn your 3 phase power stuff for the commercial work.
Now you will find some equipment that uses amonia as its refrigerant in larger buildings. Be very careful with those units. Amonia is a lot more explosive than other refrigerants.
PTACS do suck but they are basicly glorified heat pump window units. Cheaply made and not meant to be repaired much.
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Heh, we have a commercial rooftop unit that cools the hallways in one apartment building, and I noticed the two huge compressors in it. That thing intimidates me...lol. Haven't had any trouble with it other than it inexplicably froze up after we had a power outage, but I just shut it down for a day to let it thaw and it's been fine ever since then.