Update on the Mr.Cool split system (traditional duct house system not mini split)
So this thing works in ways that just destroy all the concepts of how AC systems work in my mind.
So you know… normally in split systems in residential homes, you have a thermostat - it actually has the diode that flip switches on, and off..
You set a temp, say… 75. It has a float point of typically 2 or 4 degrees, or, + /- 1 or 2 degrees… so,,,
With a 4 degree float It would sense the indoor air is 77 degrees and kick on the inside unit’s fan, and also kick on the outdoor units compressor and fan.
The air gets cooled and circulated until temp indoors reads 73 and it stops all function. Generally they are 2 degrees but whatever…
This thing, as I remember being told a few years ago has a variable fan…okay.. they said it runs all the time at low, kicks up with the compressor then down again etc.
That is what it seemed to do.
So, its super hot, and during the day I know its rough… so i set it to 77… thermostat says 78… floats sometimes to 77…and 79…but mostly sits at 78.
To me its working but can’t fully keep up… i get it, its 100 degrees out, i have a bad vent still… but the air comfort in the home is MUCH better than before. Circulation of air is way way better.
It’s hard to tell when the air blower goes off, the thermostat does not click and its quiet… so i have to like catch it off…and it does that variable fan thing so it is on a lot.
At night i figure it should be able to “catch up” and stay 77… i notice the air coming out is not quite as cold… usually like 10-12 degree split from ambient.
I get worried i am leaking somewhere.. when i put it in at first, i was getting the target 20-24 degree split…
So i figure that is why it can’t keep up…
Then we get 2 days lots of rain and overcast… its “only” 85-88 out… still it sits at 78 when set to 77.
I am checking temperatures out of handler and vents… still like 14ish split…no wonder it can’t cool…
My wife says “just set it lower” i am like “woman! That’s not how it works! The cooling aspect of how much it can cool the intake air is what it is, compressor is on or off,”
So… i do… i put it at like 74… i am like, its running all the time at 77, and it reads generally 78, sometimes 77 sometimes 79 but usually 1 over.
I give it some time and check the vent temp… and… 25 degree delta?!?! It cools to 75, then it starts to again act like its been.
So… sorry tldr…
The thing apparently has a variable compressor that leads to at least 2 different levels of cooling and temp delta… I have never heard of that… i could be completely wrong..but now…
It is colder than this house has ever been in Florida August 100degrees.
And the past 4 days since this revelation, it will cool to whatever i tell it.. +1 it always seems to sit one above the setting.
so if i want 75, i tell it 74.
Edit- so i just have to stop, set it one under that i want and just let the dumb thing go… yeah that’s the objective right? Yeah but i tend to like to know in general how things function…