Before adjusting speed. You might want to look to see what its set at. And then determine if that is too high for the outdoor unit.

 

Thanks for the reply, beenthere.
The air handler is a CBX27UH-042, matched with a XC14-036 condensing unit.
It replaces a 2 1/2 ton system. As far as I know it is factory set to 1400 cfm at .5 static. What I need to know is if this is something I can handle or should I contact another contractor?

 

Did they also replace all of your old duct work. Since it probably was smaller then your old 2.5 ton system needed.

Lots of companies fail to set up the blowers properly. While it can be slowed down, its possible, that you will need duct work alterations.

A home owner can set the speed lower, or higher if need be. It just you can't check to make sure that the speed change didn't effect the charge.

 

Why do you want the speed changed?

It is possible, but I would want to monitor operation with refrigerant gauges and temp probes to be sure everything will run OK.

1400 is a bit high for a 3 ton.

 

factorie setting means nothing what does your instaler have it set at this is the important thing he is responsible for your comfort
have him out to explain the settings and make any ajustments nessary

 

The 27 is NOT variable speed. It has 5 speed taps and airflow drops as static increases. To set the airflow properly, a tech would need to measure static pressure and try each tap til he got around 1200 for the 3 ton unit. There are also settings for constant fan and electric heat.