Quote:
Originally Posted by Ronnie's.930
How many 911 a/c systems have you been able to charge to -10dF using the method you are disparaging above? The coldest I have been able to get with that technique is a vent temp of 26dF (measured after a drive in mid 80s ambient), and 29dF measured at idle in 98 ambient (pressures on the low end of acceptable ranges). This is with a 3 condenser system, albeit with a 1/2 bay tail condenser.
And right, the vent temperature & pressure charge method is "a bit foolish" - only a fool would want cold blowing a/c that quickly clears cabin heat and enables conditions where the compressor is not required to run all of the time to maintain an extremely comfortable interior environment, right?
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I fully admit that I am having a very hard time grasping the idea of getting vent outflow temperatures well below freezing, 26dF, for more than a quick cabin cooldown period or with Rh extremely low.
I'm even having trouble with the stated T-stat setrpoint range/span, 26+/-2dF open, 33+/-2dF close. With a "square" hysterisis the average would be below freezing, but one must assume a non-square hysterisis functionality, longer period to go to "close" vs getting to "open".
The hot and humid climates that exist in my area of direct knowledge, Memphis, etc, would not allow for that.