How many of you use a micron guage?

[beenthere]

Are looking at 30"hg pressure, or 30"hg vacuum?

[DPSwitch]

I think they just looked at the wrong side of the chart.

[DPSwitch]

29.921in hg = 0.000 microns

[beenthere]

Thats not the greatest chart for what we're talking about.
But I ain't got one better, so I'm not complaining too much. Yet.

[BigJon3475]

Did my previous attachment not show up? I was kinda curious about input on that.....elevation effecting maximum vac. level.

[beenthere]

I won't say it can't happen, but under usual circumstances in mild or hot weather, the chances of freezing water in a system are pretty remote, regardless of the size pump used.

If there is enough heat available to prevent the water from reaching 32º, no ice will be formed.

I wish we could find a clear glass tube. That could have a few drops of water at several locations to run the test over again.

I think it more possible when the evap is in a cool basement.

[Mr Bill]

Yea, I guess I am just a dummy but way back in the late 60's I took a what I would call a crash Course at the Carrier facility here in Houston two nights a week for 4 hrs. and it did teach me a lot of the really technical stuff at that time I thought I would never use, hey I was young and knew it all at that age,right? But at the very first class I remember one thing the teacher told us and he put it just like this it's impossible to pull a 30" vacuum and I have always remembered that.

[beenthere]

I saw it. But since I'm basically at sea level, it doesn't affect me.

[fitterchick]

pressure apparently

I have always been taught pulling a vacuum by reading you gauge (30hg) is not good enough, you have to pull it lower by reading your microns. It has been pounded in my head for many years.

I guess this whole thing could have been avoided if I would'nt have mis understood the statement. (chart readings vs. actually gauge reading)

Sorry, I will stick my tail between my legs and walk away.

Oh yeah, Bill I hope your wife is a sweet lady since you compare me to her.

[DPSwitch]

it's impossible to pull a 30" vacuum and I have always remembered that.

You can......

but it really sucks.

[beenthere]

But at the very first class I remember one thing the teacher told us and he put it just like this it's impossible to pull a 30" vacuum and I have always remembered that.

I was told the same thing.
Plus, he told us, don't believe what your compound says when pulling a vac.

But my teacher wasn't from Carrier, so what would he know.

[DPSwitch]

Sorry, I will stick my tail between my legs and walk away.

Don't go anywhere.

anyone who cares enough to go through that conversation, is either very good, or on their way to being very good.

[beenthere]

pressure apparently

I have always been taught pulling a vacuum by reading you gauge (30hg) is not good enough, you have to pull it lower by reading your microns. It has been pounded in my head for many years.

And no one here will tell you your compound guage can be used to tell when you have a good vacuum.

I guess this whole thing could have been avoided if I wouldn't have mis understood the statement. (chart readings vs. actually gauge reading)

But we have more fun with threads when someone misunderstands what was said.

Sorry, I will stick my tail between my legs and walk away.

Hang around, it only gets worse, ah I mean better.

Oh yeah, Bill I hope your wife is a sweet lady since you compare me to her.

Heck, you soon have enough post to apply for pro membership from this thread alone.

And Mr. Bill is on the membership committee.