Quote:
Originally Posted by cbearden
...I was also curious why there are multiple cap tubes involved here...
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I have noticed multiple cap tubes on medium to large sized units. I have some 1/4 Ton units and they have single cap tubes. I have some that are around 1/2 Ton and they have two. I had an evaporator unit in the back yard that was 3 Ton and it had several. I think it is done for efficiency.
If you're going to try to reuse your cap tubes, you could choose to build two smaller HXs with a cap tube for each one. Or you might try to braze up some kind of two-into-one manifold. Most of the more experienced HVAC guys seem to prefer using a TXV metering device.
I used a cap tube on my #1 proof of concept machine and it worked great and I learned a lot from the experience.
I bought a TXV, for my first experience with TXV, to use in my next machine (ASHP air-in-water-out) that will be used for hydronic floors.
-AC