Quote:
Originally Posted by wwest
That's why it seems a bit foolish to me to target the lowest vent temperatures for proper refrigerant fill levels. You might even get to -10dF  , but you then have to limit the COLD level to 33dF on the average using the T-stat setting to prevent freeze up. |
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?