MADE MYSELF A LITTLE SUBCOOLER. READY FOR SUMMERTIME HVAC IN TX.

[@subcoolHVAC]

Right on 👍 Subcool all Summer . Nice build !

[@jasonjohnsonHVAC]

Thanks bro. It was a fun little project

[@memarhar]

Nice and compact. I like that you left it versatile with its function.

[@jasonjohnsonHVAC]

Appreciate the comment. I wanted to make sure it was not just a one trick pony. It's fairly cheap to build and it's kicking but. My refrigerant going into the bottle today is 92° and it's going into the subcooler at 117° sat temp.

[@Eddy63]

Nice little set-up Dbl J ... Thx

[@jasonjohnsonHVAC]

Thanks Eddy.

[@FrenchBeefCDN]

Nice and clean. I made mine out of a coaxial coil. Works very well have used it several times. Passed a 750psi pressure test when I made it lol

[@jasonjohnsonHVAC]

I would love to get my hands on a decommissioned WSHP to do exactly what you said. I usually don't have the chance to replace any, so until then....this will do. Thanks for the comment

[@FrenchBeefCDN]

We had a bunch of warranty coaxial coils from heat pumps that were just sitting on a shelf for years… but you can buy a brand new one for about $150 at the supplier. Yours will work beautifully all the same, it doesn’t take much flow to cool the refrigerant down. Like a large coffee cup a minute is plenty of flow, any more is a waste of water. Sometimes when you have access to chilled water that is the best and no water gets wasted. You can recover about 1lb vapour every 60-90seconds (134a) using a standard 1hp air cooled recovery machine which takes about 120-180 sec without sub cooler.

[@MariosACandRefrigeration]

nice subcooler.

[@jasonjohnsonHVAC]

Thanks for the comment.

[@matt4620]

Until you mentioned the cps transformator , I was wondering what this was. Maybe a beer cooler?

[@jasonjohnsonHVAC]

😆. Yeah made a nice subcooler for less than that CPS one. Real good heat transfer as well. The ancillary parts I had laying around. Only had to buy the hose. It works good and is decently service friendly. I like it. Thanks for the comment

[@shawnsmith2625]

Where did you buy the heat exchanger from?

[@jasonjohnsonHVAC]

I bought it off ebay. Pretty cheap. The whole build cost less than that CPS job, and it's better heat transfer. Parts are pretty cheap and I had most of them laying around. Thanks for the comment

[@surecom12]

Shouldn't the valve be before the heat exchanger? Not after... thinking of pressure rating and the rate of heat exchange

[@jasonjohnsonHVAC]

Valve always goes on the leaving water side. That way the HX, coil or pump never has a chance to run dry. That is also where you control flow.

[@WhowereEpsteinsclients]

The amount of work I do, I just buy the one at the supplier. The money we make just buy one lol. Yours is so cheaply made its going to be more of a headache than anything else. A coil of 3/8 copper and a 5 gallon bucket is better than this.

[@jasonjohnsonHVAC]

That's your opinion and you are entitled to it

[@FrenchBeefCDN]

Wrong though. A contained heat exchanger is much more compact and efficient than a coil of copper in a bucket, unless you are flowing the water into the bucket constantly. The one at the supplier (cps) is only 1/4” tubing and requires a bucket of water which will warm up. Having a coaxial or brazed plate heat exchanger allows you to slowly feed cold tap water through the coil keeping your recovery discharge closer to 60f vs 90f bucket method. Much easier to run hoses from source to drain than drag a 5 gallon bucket let of water. I’ve done both methods, my back much prefers to carry empty hoses and a sub cooler than a full bucket of water. Plus you can make your own for cheap and just need to braze a few adapters. My coaxial coil cost less than $150 and took me an hour to make. Have used to recover thousands of lbs R134a, R410a on air cooled and water cooled chillers where a water cooled recovery machine was not available and frankly no longer necessary with my sub cooler. Tank stays below 70f even in the July heat.

[@WhowereEpsteinsclients]

@@FrenchBeefCDN If it worked so well everyone would have one already.

[@FrenchBeefCDN]

That’s some logic there. It keeps heat pressure down, which keeps flow rate up, doesn’t cycle hpco, doesn’t pop relief valves, stays cool the entire time and you don’t need to drag a 65lb bucket of water around. Cuts vapour recovery down in half which saves you the technician time standing around waiting on recovery. It is a good idea and the guys I work with started making their own after seeing mine in action. Large commercial recovery machines (York RP-2200) use a coaxial coil condenser and recover a pound of vapour pump in seconds, I just tried to mimic that in a smaller lightweight package that I could keep in my van on machines under 2000lb charge. It works, really well.

[@jasonjohnsonHVAC]

@@FrenchBeefCDN 🤘🤘🤘🤘🤜🤛