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Old 02-21-14, 05:32 PM   #21
jeff5may
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I found a grossly oversized Hx here:

copper refrigerant pipe: $113
TURBOTEC | COILS, STEAM & WATER | 3-1/2 TON COAX COIL | Surplus City Liquidators

cupronickel refrigerant pipe: $208
TURBOTEC | COILS, STEAM & WATER | 4 TON COAX COIL | Surplus City Liquidators

Both are rated at 450 PSI working pressure (burst pressure much higher). Your water-source setup should run at much lower working pressure in cooling mode (450 PSI = 125 degF saturation temp, 100 degF Tsat = 317 PSI). In heating mode, pressure is not an issue (freeze-up is related to pump sizing).

OR

You could look into China and have one custom built for cheap. Some suppliers will pretty much design and build a single one-off part for you, given pertinent performance specs. Not very expensive, either.

http://www.alibaba.com/product-gs/15...Exchanger.html


Last edited by jeff5may; 02-22-14 at 06:36 AM..
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