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Re: New refrigerant for HVAC.
There was a time a few years ago where I had a list of new refrigerants they were considering to replace 410a and methyl formate was on it. The same stuff my 91 year old monitor top is running.pecmsg said:Thank you @Jamie Hall appreciate that. I'm still curious as to why these refrigerants are "new". Why "new". I remember in the 1980's and early 1990's the replacement "new" refrigerants was what was needed for the ozone layer depletion. This along with certain types of chlorine was changed for pool use. Recover reclaim and reuse became the new saying in HVAC/R. Has the "new" refrigerants from some thirty or forty years ago become out of favor? And if so, why? So I'm wondering...whats...new?The patents for the New refrigerants of the 90's are running out. Time for New again!
I literally did the Tom Hanks laugh.
https://youtu.be/ca9GuwuOVZc?si=Qf9Y8KKgBA_If5kW
ChrisJ
2
Re: Broken historic fridge
Yes, you are right. I am wrong.
I had potential relays on my mind.
I seldom, if ever, see current relays.
I had potential relays on my mind.
I seldom, if ever, see current relays.
JUGHNE
2
Re: Measuring flow in a hydronic system
> Just so he knows what all those books are saying is true.Exactly. Trying to figure out which parts are the true parts.
Sometimes true
Re: Measuring flow in a hydronic system
> Just so he knows what all those books are saying is true.
Sometimes true
Sometimes true
Re: Measuring flow in a hydronic system
Definitely someone who just wants to know stuff. Somewhere between a tinkerer and a mad scientist.OP here -- I don't need the balancing function, the gauge would just be for informational purposes. So is something like that available without the balancing valve? They're kind of pricey, that's all.What will you do with that information?
Are you experiencing a problem that needs diagnosing? Or are you just one of those folks that just needs to know stuff.
Re: What happens when you run a 240V motor at 120V
Take a video of it when you energize it!DCContrarian said:OK, it looks like it's a permanent split capacitor (PSC) induction motor. A little internet reading tells me that the speed of each winding is entirely determined by the frequency of the power supply. At a lower voltage it runs at the same speed and same power, so a higher current. The only question would be whether the windings can handle the higher current. I don't see a way of finding out other than trying.
pecmsg
4
Re: Maximum PSI at home with water booster pump receiving 50 PSI from utility water main?
Yep, That exact book is sitting on my shelf about 10 feet away as I type this... and my old Pickett slide rule is in my desk still... (still works. No batteries required...)or C wire
pecmsg
2
Re: Old Galvanized Pipes: Should new fittings be BRASS or STAINLESS?
Es verdad. Don't mess with Local 130. We only allowed limited use of PVC or no hub for drains in the past 5 years.Code in Chicago is brass fittings for transitions between copper and galvanized. I'd go with the lead free brass option.
PEX is not code for potable for multiple occupancy buildings if you're in the city or Cook. Copper or galvanized only.
They actually don't allow PEX but allow galvanized?
Good grief.
I wasn't joking about lead seals for drains in the other thread. If I had to sum up the Chicago Building Code in one line, it'd be "If it's easier or saves time, it's not allowed"
Re: Sometimes You Win, Sometimes You Lose
It doesn't sound like failure. It sounds like sabotage. How come no one blames Gremlins anymore?I always blame the gremlins or say the house is haunted 👻. It’s never my fault. LOL
