Looking for some air conditioning info , book recommendation, or links. I have a computer controlled AC system that I need to have functional via 60s technology. I have very limited knowledge on AC, so this will be a learning experience.
This is the best place I have found for A/C help and information, good bunch of people. http://www.autoacforum.com/categories.cfm?catid=2
Any AC gurus in the house ? I know enough to be dangerous but I may be over complicating it. Pressure switch to shut clutch relay off maybe all I need ?
im needing to learn about ac myself.as long as ive worked on cars ac is not something i had a interest in. dumbass me lol. ive got 4 underdash units now i have to see what else i need to get a couple of cars with cool wind. i am now old!! remember the days when we got a car with air and that was the first thing we took off! not anymore lol
The computer makes sure high speed fan is on. * that's easy. The computer triggers ac compressor for initial start up. * that's easy The computer toggles AC clutch via pressure sensor readings. That's the fuzzy part at this point. Thanks Heap
I'm no expert on A/C systems for sure, going off memory from a Ford class I took a couple years ago, but can add a few things. Hopefully someone will correct me if I get things horribly wrong. Most systems will use 3 switches (often with 2 built into one part). The high/low pressure switch will shut off power to the field coil (compressor clutch) if for some reason the system over pressurizes, or if you spring a leak and lose all your refrigerant, this will keep your compressor from burning up. The 3ed switch turns the compressor on when pressure drops during normal operation. EDIT: Whats the year/make/model of car the systems from? Would be able to find more info for you.
If you use a cycling clutch system as in a ford car, you need to have fixed orifice tube in the line. The two switchs operate in the two pressure side of the a/c system low and high. They are pretty basic and not to complicated.
I don't thing what you are saying makes your system computer controlled the switches you are talking about are normal and relays can make the system work Do you have a computer for the system you want to install?
Well it seems to be computer controlled, most certainly involves a computer, the computer determines how the system runs and cycles by its one sensor that has 5 volt reference and reads high and low pressures. I want to eliminate the computers involvement entirely.
Dennis Overholser wrote a book "Hot Rod Wiring" I bought it on line at Wolfgang Publications.Page 138 has a diagram with how to. I would post it but I don't want to violate any copy right law.
I need the system to work and function just like any pre 80s pre computer system did. I'm sure its relatively simple, I just don't have a good grasp on the theory or component function to satisfy the needs. I don't want this to go off topic any further than A/C already might be.
Put a common a/c binary switch on the high side. That will disengage the clutch if no or low pressure. You can also wire in a thermostat with a probe that will control temp cycling. Check the vintage air catalog. You can buy them individually. http://www.vintageair.com/catalog11/pg75.pdf
If you want to learn all about auto ac, a good source of info is a training for manual ASE exam book. Maybe more info than you need, but it covers the basics for sure. Not expensive either.
The Jalopy Journal
