Earlier this summer, I had written about my Trane XL14i system, regarding Comfort-R, jumper settings, and humidity. The technician had made several changes
and the system seems to be running better
1) jumpered Y to O for Comfort-R
2) slowed down the blower motor to 350cfm
3) adjusted dampers to equalize upstairs and downstairs airflow
The system has no problem cooling the house to 72-73 degrees on hot 90+ days. I have found that the humidity level much lower when the fan is running in the auto position as opposed to on - 48-50% vs 58-62% - I notice water in the pipe from the air handler that leads to the outside gutter for drainage. I have never seen any water in the safety pan underneath the airhandler. Could slow drainage account for such a difference in humidity level?
I have been outside more the last few weeks and have noticed the compressor making a loud grrrrr sound when it first starts up (about 5 -10 seconds). It quiets right down and then all you hear is the fan. You don't hear it in the house, and I really never noticed it before. Is this normal? Didn't want to call the technician and take him away from someone whose system is not running at all.