I have an 18,000 BTU A/C unit that blew a compressor last year. Perfect for a small project. I however could not find a professional to help me out, so maybe it's DIYable. I know just about enough about this to know I'm no match for a professional.
I thought it would be awesome to heat the pool and cool the house at the same time. The pool's a 24 foot above ground pool and has no heating right now, it averages about 70 degrees. Bonus is that it could act almost like a split system - the water could be piped right up to the unit rather than having the fan hanging off the back.
Condenser: I've sourced two American-made water heat exchange manufacturers and spoken to one of them. I really like the Aqua Systems model, but the smallest is rated at 2 tons - that's apparently 24,000 BTU. A very friendly guy there referred me to Edward's Coils - but they don't seem to have much data online. If I can't use the Aqua Systems model for technical reasons, I'll get in touch with Edward's coils and see what they have to offer. My question here is will the 2 ton unit overload the rest of the compressor, and why?
Compressor: The compressor is dead in the unit. It seems to be a sealed unit, I'm not sure about repairing it. If I was to replace it, is there any reason I should replace it with the exact same part? Is there a different compressor type that would better serve this purpose?
I'm going to have to find somewhere to evacuate the refrigerant in here. Any suggestions?
I'm good at soldering, however I've never soldered on an A/C unit before. Is there anything chemically different? I know coolant in automotive systems tends to seep into the metal and requires extra cleaning, I'm not sure if there's anything of that nature here.
If the condenser I remove has different size tubing than the new water cooled compressor, would an adapter suffice?
Any suggestions on where I can get it charged up after it's assembled? How would one calculate the refrigerant requirements?