410 a evap temp quandry
I have installed a Goodman 16 SEE 410a .
Could not get the SH and SC in balance so I adjusted the TXV but could not get below a 45* coil.
I always uses the delta T OF 18* TO 21*.
tECH SUPPORT SAYS i WAS IN IN THE DARK AGES AND SHOULD BE USING a delaT T on a 16 SEER of 15 to 21.
But my SH wa not right and the S and I MANUAL SAID TO ADUST SH TO ACHIEVE the evap temp drop.
Please advise and what is the right method.
Is it 40 or 45*/
Measuring return air wet bulb temperatures will make the difference. Note how wet bulb affects superheat in the chart below when the outdoor dry bulb (ambient) temperature remains the same but the indoor wet bulb temperature varies:
Other charts are out there that show how the indoor coil split can vary according to indoor return air wet bulb temperature. If conditions are right, you can see an indoor split as low as 15 degrees and the system is properly charged and working correctly. That would be typically very humid air and a higher than normal return air dry bulb temperature, but nevertheless it is possible.
- Electricity makes refrigeration happen.
- Refrigeration makes the HVAC psychrometric process happen.
- HVAC pyschrometrics is what makes indoor human comfort happen...IF the ducts AND the building envelope cooperate.
A building is NOT beautiful unless it is also comfortable.
As Shophound has eluded to "it is all about air"
Originally Posted by itaintme
What is your SC?
Thank you Been there,
Originally Posted by beenthere
Also thanks to the other responders,
Yes the low side evap temp will vary with load.
What i was looking for was a base line that, in the industry,a consensus existed to describe.
oops.. missed the SC (subcooling ?) question: Superposed to be between 5* ans 7*
with a SH of 7* to*9.