Chiller Hack (DIY)

[cyclopath]

@Dannywarbucks

We didn’t worry too much about all the technical mumbo jumbo lol.

an zen?

(how does it perform…)

[Dannywarbucks]

Pretty well for the times… 3-4 years ago. I have pics on my instagram of us injecting at -25C.

Probably could have gotten colder of we had the proper controls. BP of 404a is -40ish I think, so a tighter txv and/or a lower overall charge would’ve gotten us there, provided condenser size wasn’t the limiting factor. It was a very fun and satisfying hack. We used that system for probably 2 years before we went to a px1 hybrid system.

[cyclopath]

This may prove useful for folks performing similar tricks who find they need to spoof the temp sensor…

Overriding Lower Set Limit on Mini Split Heat Pump

just in case you feel the need to : RTFM ac012mnadchaa.pdf (4.8 MB) Resistance is futile? [image] Nope: you could replace that glass of water with one… And if you’re clever about it, you can use another resistor across the temp sensor (parallel) to spoof it in a controlled manner: https://www.angelfire.com/my/fan/CTS.html You want 13C to read as 20C. So you need to lower 18000ohm to 12000ohm 1/R = 1/R1 + 1/R2 1/12000 = 1/18000 + 1/R2 => R2 = 36000 Most flexible solution would be to t…

Cheaper than a Coolbot

[dabtb]

Did you ever make this reality? Id love to talk about the results

[pdxcanna]

DIY Cascade Refrigeration System (Part I)

[Neutral]

HyperspacePirate is the shit. This man is making his own ethylene from ethanol so he doesn’t have to get a refrigerant handling license (or pay for it). Hooks that to a beachball to collect pure gas, then hooks a fridge compressor to a tank and stores it. Absolute maniac.