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jeff5may · 02-13-13, 07:41 PM

I found a suitable HX on ebay for $35 plus shipping.

http://i1326.photobucket.com/albums/...psf7ab4dcc.jpg

3/8" line wound around 1" pipe with reducers at each end. 11" overall length, Sized for 10 degF subcooling, 20 degF superheat at 1.5 ton capacity.

All major manufacturers recommend the same superheat/subcooling values as this example for a sizing reference. Most say this is all the transfer you should need. Some say to go up one size for extreme performance. Who am I to argue?

I believe I am ready to build a SLHX for my unit. Since the compressor is rated at 10500 btu, I will borrow from this example and wind 10 turns of 3/8 inch copper refrig. line around a 1" pipe as a liquid side exchanger. For the suction accumulator, I'll chop an evacuated and purged propane bottle down to about half its original size, plumb the shell, then braze it all up. Wish me luck, please.

02-13-13, 07:41 PM	#42
jeff5may Supreme EcoRenovator Join Date: Jan 2010 Location: elizabethtown, ky, USA Posts: 2,431 Thanks: 431 Thanked 619 Times in 517 Posts	I found a suitable HX on ebay for $35 plus shipping. http://i1326.photobucket.com/albums/...psf7ab4dcc.jpg 3/8" line wound around 1" pipe with reducers at each end. 11" overall length, Sized for 10 degF subcooling, 20 degF superheat at 1.5 ton capacity. All major manufacturers recommend the same superheat/subcooling values as this example for a sizing reference. Most say this is all the transfer you should need. Some say to go up one size for extreme performance. Who am I to argue? I believe I am ready to build a SLHX for my unit. Since the compressor is rated at 10500 btu, I will borrow from this example and wind 10 turns of 3/8 inch copper refrig. line around a 1" pipe as a liquid side exchanger. For the suction accumulator, I'll chop an evacuated and purged propane bottle down to about half its original size, plumb the shell, then braze it all up. Wish me luck, please.