hey guys, I have the 18th edition of the Modern refrigeration and air conditioning book and its awesome for info on refrigeration and air conditioning. would like to know if anyone knows of a good book on more the heating and ventilation side as well as BAS. I spent most of my career in residential and moved over the restaurant equipment for the last 8 months. Going to start with a commercial hvac company in the next few weeks and I'm sure I have lots to learn, any good website or books that anyone can recommend, I'm pretty comfortable with wiring on residential low voltage, had a chance to look at the wiring on a roof top recently and thought to myself, WTF are all these extra terminals for. Gotta get some info, help if you can
scarey
Modern R&AC is probably one of the better textbooks, Refrig and AC Technology is also good, but I find all of them a bit outdated. Even the new versions. My son is in trade school and they had to buy a new textbook, Electricity for Heating, Refrig & AC, and it looks quite good. It was just released within the last few weeks.
Don't be overwelmed by rooftop wiring. If you are good with wiring diagrams all rooftops can be traced out with a bit of patience (a little more difficult when its -20 degrees). Lennox is the worst, they don't follow the industry standard of RGYW, they use their own colour scheme for wires. Still, if you follow the diagram they can be traced without trouble. Also, everything now is going to circuit boards and logic control. You're basically just checking for signal in and signal out, and making sure things are configured correctly. Most manufacturers are getting better at being available for technical help.
Good luck with the restaurant equipment....hope you don't mind working in extremely tight spaces and getting stepped on. If you get into the make-up air and exhaust hoods, they are also getting digitally controlled and most new ones are variable speed drives.
Are you a licensed refrig mechanic (313A) and Gas fitter? If not you better get signed up for it, the MOL is checking more regularly now and it doesn't go over too well if they catch you working on equipment your not supposed to be working on.
I'll have to check out that book, not as sharp as I'd like to be on tracing wiring diagrams as I'd like or should be, never really had to until now, as good technicians we must evolve. I'll check out that book and see if its worth buying.
As I remember about residential Lennox as a bitch as well, always a joy working on anything of theirs. Comforting that everything is going to solid state and logic controls, but I'm sure there are a bunch of old bastards out there in my area too.
I'm giving up restaurant equipment, I thought residential customers basements were bad, kitchens are something else. I am a G2 gas fitter, I am signed up for my 313a and I have my 313d, got about 4500 hours in so far. Company I am going to work for does mostly rooftops, boilers and steam boilers. they don't have a 313a on staff at the moment, so hope that changes in a hurry. I've never seen a MOL guy out there in 12 years, that being said I'll meet one soon. need some info on economizers and such, any good links?
Good Luck
Here's an economizer video I thought was good,
http://www.youtube.com/watch?v=dg0Ye-De2X4