Man..Ed is a pretty good guy..and hes right, hes willing to learn.
Hell, if you had told me that 12 years ago, i would have laughed at
you...then, I got to learn all about swamp coolers and what 1/3 HP more or
less can do....:)
I'll agree with you about Ed, but his replies in this thread seem to be
a bit uncharacteristic of him. I'm only suggesting that if he doesn't
trust what I said, then he might want to hit Google up about it ;)
This is Turtle.
Yes i can see where I'm not the suck up type and would not ask you
question that any normal suck up would ask , but i see you and CB are
dodging the bullet on answering Ed's Question for if you do you will be
covering up a bullshitting line that got out of hand. So you two will
take the 5 th on this one for if you answer , you will step off in it.
Now i'm going to ask you the querstion of this : Richard , what is
wrong with ed's post above here and explain to me how or what is wrong
with it and not just go get some books and find out. If you knew you
could explain it in 1 or 2 line and it's all over. if you don't say
anything i will take it as just running from a bullshit that got out of
line. it hurts to cut and run don't it !
This is Turtle.
I always want someone to tell me something that i did not know but here
you are mistaken as to right or wrong.
Go back and read what Ed wrote here and tell or explain to me what is
false about what he wrote and not say i have all these book to let you
read to learn something. You or CB can't punch any holes in what he
said at all and as it seem tring to dodge the question as to answer his
statement as what is wrong with it.
Richard , have you been drinking something ?
Well that's called wishful thinking on your part. A typical indoor
blower for instance, has three or four speed taps. All of these will
cause the motor to run at near 1200RPM under no load. Low speed is only
lower because it has lower torque and thus more slippage. The same
applies to a 1075 RPM condenser fan motor. If you oversize sufficiently
you can approach and RPM of 1200, which I think you'll agree is much
faster than 1075.
This is Turtle.
i know what your hitting at here and you have pushed your motor theory
too far to accept here.
If you have a 1 h.p. motor 1075 rpm, running at 1075 rpm on a 1 horse
load. Then you take a 2 horse 1075 rpm motor and replace the one horse
motor with the 2 h.p. motor 1075 rpm . the 2 h.p. motor will pull the
load well at maybe 1075 to 1085 , but no where near 1200 rpm. now leave
power factors out of it here.
Now you say a 1 hp motor 1075 rpm job when replaced with a 2 horse
motor 1075 rpm , the motor will turn at maybe 1,200 rpm or better.
Now you may have got your info from Nick Pines but in the real world
the single speed condenser motor 1075 1/3 hp. will turn at 1075 at 1/3
hp load. if you increase the horse power two times will not increase
the speed any great amount to speak of or about maybe 10 rpm's at best
because of a 1/3 hp load and a 2/3 hp motor pulling it.
Now you say a 4 speed indoor blower will spend at 1,200 rpms if on high
and on low and other speeds it will run slower because of slippage of
the motor and make it turn at say 800 rpms.
If this is true and lower speed and all other speeds turn at 1200 rpm
always if unloaded. Why do they have 4 wires on it and just have 2 and
just let it slip for the other lower speeds.
Probley what your tring to use for a example is the new multi-horse
power & speed motors. With these they may have this theory but regular
motor don't follow your thinking.
I know a fellow at emerson and i will tomorrow to check with him and
check your NEW theory out. I've heard it before and it did not flow.
The trip saver is just a multi-tap motor. The main difference is that
the HP of the highest speed on the trip saver can be adjusted by simply
changing capacitor mfd rating. You can do the same thing with any other
4-speed blower motor, but you would need to know what you were doing,
because the instructions won't be drawn out for you on a little piece of
paper like it is with the trip saver. I doubt that any manufacturer
would warranty a motor that had been field re-engineered, but that
doesn't mean that it can't be done.
Now as for your numbers, you should consult the motor's RPM/torque curve
before attempting to post any numbers. Keep in mind that motors aren't
all made equal. A PSC motor for instance, varies more in RPM through
changes in torque than does an induction run motor in the same
application. If you look at the rated RPM you can see the difference. A
typical PSC with 1200RPM synchronous will typically be rated at 1050 or
1075RPM at full load. An induction motor OTOH might be rated at 1100 or
1150RPM. Both have the same synchronous (no load) RPM of 1200, but they
will not run the same RPM with equal loads. The PSC will run slower.
If you double the HP of the PSC you will get much more of an increase in
RPM than you would by doubling the HP of an induction run motor. You
won't however go above synchronous (rotating field) RPM regardless of
how much you increase HP.
Don't beat yourself over the head too hard for missing this one, even
Jake missed it a year or so back over in alt.hvac. I had to post motor
curves and articles for him too, before he finally understood that I
knew what the hell I was saying all along. :)
I need quite a bit more info. what is the outdoor andf indoor temp
when you are running? did you replace it with the same HP and RPM?
what temp do you set it at?
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