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Target Superheat=(return wb x 3 - condensor intake drybulb -80) /2

So let's say return wetbulb at evap. intake is 80
and it is 80 degrees at the condensor intake

80 x 3 = 240 - 80 - 80 = 80 divided by two = 40

Under these circumstances you should
have 40 degrees superheat?

2. Yes, but keep in mind that the equation you have is a simple linear correlation of some charging chart data. You don't know how accurate the correlation is at the conditions you state. And 40°F superheat will be about the TD of the evaporator so charging to this superheat may prove difficult.

3. That would be right, + or - 5°

Although at that ID WB, and OD DB, I wouldn't expect the ID delta to be much more then 10° untill the WB dropped to the mid to low 70's.

4. In a rainforest that sounds close!

Try a more normal scenario. How about 65wb and 85 out?

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Originally posted by BaldLoonie
In a rainforest that sounds close!
In Florida we often have high humidity. But
how can you tell what the humidity is since
I never gave the indoor dry bulb tempt.?

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Originally posted by BaldLoonie
In a rainforest that sounds close!

Try a more normal scenario. How about 65wb and 85 out?
I never said you could not find some conditions
where this equation works. I just wanted to
know if it was always accurate. It is quite
possible to have 80 degree indoor wet bulb
and 85 degree or 90 degree indoor dry bulb.

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Where am I wrong?

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