PSC motors banned?

Status
Not open for further replies.
junkhound

junkhound

Senior Member
Location
Renton, WA
Occupation
EE, power electronics specialty
Saw a mention of PSC motors to be banned from compressor units in HVAC equipment.

First have ever heard of this, anyone have any detailed information?

The implication was that if R290 replaces R-410 in HVAC, no one want any sparks near possible propane leaks. Would that mean all contactors would need to be solid state also or or all motor drives inverter fed?
 
Well, we've certainly seen the new-fangled blower fan motors, yes; and the extremely high failure rate and repair costs involved. It's downright embarrassing to tell a client how much to repair the blower on their 3-year old machine these days. They almost always pick the option we give them to do an adapter board so we can replace the new motor with a PSC.

But compressors are another story.
 
About R-290

About R-290

junkhound said:
Saw a mention of PSC motors to be banned from compressor units in HVAC equipment.

First have ever heard of this, anyone have any detailed information?

The implication was that if R290 replaces R-410 in HVAC, no one want any sparks near possible propane leaks. Would that mean all contactors would need to be solid state also or or all motor drives inverter fed?
Click to expand...

R-290 is the absolute worst idea in a very long time and is based on fully " Fradulent " pseudoscience. The trend in HVAC is shameful and fully absurd.
I have been in the trade passing 30 years and its getting stupider every day. If you are unlucky enough to have R-290 systems in your charge, drop some R-434A in and see how it goes. The mass flow should be very close to the same. I have not tested it in any Cap Tube systems as yet, but it should fly.
There is zero " man made climate change "​ in the way it has been cooked up. This is all a colossal lie.


Star
 
re: based on fully " Fradulent " pseudoscience

I take it the 'science' you refer to is the anthropogenic component of climate change?
R290 (propane) works better than R-22 (or 410A) and since 434 has isobutene in it, that is flammable also - at first I thought your 'fraudulent' comment was related tot eh thermodynamic properties of R290.

The energy efficiency part of the previous response answered my query as to why PSC motors were being 'banned'.
And not let us digress into ethanol in gasoline... :rant::cry::sick::thumbsdown:

Hmm, are some of the same folks that force use of AFCI the same cabal as the 'ban PSC motor' crowd?

And the throw away good 199+ proof vodka by dumping it into gasoline? :weeping:
 
Last edited:
junkhound said:
Saw a mention of PSC motors to be banned from compressor units in HVAC equipment.

First have ever heard of this, anyone have any detailed information?

The implication was that if R290 replaces R-410 in HVAC, no one want any sparks near possible propane leaks. Would that mean all contactors would need to be solid state also or or all motor drives inverter fed?
Click to expand...
You cannot retrofit existing fluorocarbon based refrigerant systems with R290, it can only be used in equipment designed for using it. Whether or not these new systems will address the existence of contactors is not really our concern, it's theirs. If I had to guess though, I'd guess that the amount of propane is going to be so low that they will say that it cannot build up in sufficient concentrations to be dangerous so long as there is a vent to the outside and the propane containing components are in the lowest compartment (propane is heavier than air), just like having a propane bottle in a trailer.

PSC motors do not have anything that produces sparks, so I don't know where that came from. There is no centrifugal switch in a PSC motor.
 
GoldDigger said:
Technical. The thermodynamics is different enough that it requires a different basic design.

Sent from my XT1585 using Tapatalk
Click to expand...

Yes. In fact I’ve even seen it argued down to the molecular level because the propane molecules are smaller than the HFC molecules, so people feel that seals that work on HFCs may not work with propane.
 
Status
Not open for further replies.
Top