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Hyper core: microchannel

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Discussion starter · #3 ·
no it kinda looks like a honeycomb. But is made out of aluminum, no copper. The one i saw was on a heatcraft and failed in two days of startup. A crack was on the ubend on the inlet.
 
#4 ·
I'll email him in the morning and see if he will send me something. I was at a high school football game when we were talking. Wasn't paying that much attention, although I do remember the aluminum part.
 
#8 ·
It's from the auto industry. Like the radiator on your truck.
I have them in a/c and they are smaller. So less room for a pump down.
Have not seen them in refer yet....
 
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#10 ·
We installed a few of them at a place recently. One of them was leaking where the copper discharge line goes into the aluminum. If I remember right, the 3/8 copper was silver soldered to a small piece of steel tubing, and then the aluminum tubing was swedged around the steel tubing that was pressed into it somehow. Luckily, the leak was at the steel to copper junction and we were able to fix it with some of those blue flux coated 45% silver rods. The connection where the copper/steel/aluminum come together definitely looks like the weak point in this system.

I noticed that even though the one I was working on had a pretty large receiver, it seemed to take a lot less refrigerant to charge it up than I was expecting. Once you get the sight glass cleared, slow down because the receiver will start to fill up quickly.
 
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#11 ·
I have installed a couple of heatcraft condensing units with them. One of the benifits it less refrigerant charge. I haven't seen any leak yet though but I do imagine they would be a mofo to try and repair if it is in the coil itself.
 
#13 ·
They look pretty easy to clean.... Was working on one the other day and I could see right through it and see through the other Micro Channel the was about 15' in front of it.
 
#14 ·
MikeySq said:
I do believe Heatcraft recommend some sort of epoxy for repairing the aluminum coil

Mike
Click to expand...
My concern with this is how long does the epoxy take to cure? Its fine to shut down a comfort cooling system overnight to let epoxy cure, but thats not gonna fly with refrigeration.

I do think I saw a residential system manufacturer that offers some sort of solder for repairing their microchannel coils
 
#17 ·
Headmaster with micro channel

I installed a Bohn cond. unit with the microchannel coil. It had no tag on how much refrig. to add to flood the cond. Sure can't use the old method of calculating the length of tubing. I added about 15% more and will have to check when the cold weather sets in . Any Ideas ???:anyone:
 
#18 ·
jdwendling said:
I installed a Bohn cond. unit with the microchannel coil. It had no tag on how much refrig. to add to flood the cond. Sure can't use the old method of calculating the length of tubing. I added about 15% more and will have to check when the cold weather sets in . Any Ideas ???:anyone:
Click to expand...
Follow the link that MikeySq posted on the previous link. You'll get your answer.
 
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tech37
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