Carrier Infinity Air Flow

bjp999June 23, 2011

I have a brand new Carrier Infinity system.

- 4 Ton Performance Series 2 Stage Heat Pump (25HPA648A003)

- Infinity Series Variable Speed Air Handler (FE4ANF005T00)

When I go into the advanced menu / checkout and turn on the heat pump for high cooling, the system is reporting 1400 CFM air flow. The static pressure is good at 0.53.

Why is it reporting 1400 CFM? Installer says everything is set up for 4T but could not explain the reading being 1/2 ton low.

Thank you for reporting this comment. Undo

It might be running 350 cfm per ton to reduce humidity. You can set a desired humidity target in the advanced menus, too.

    Bookmark   June 23, 2011 at 9:24AM
Thank you for reporting this comment. Undo

Carrier's default is 350 cfm/ton on the FV4/FE4 fan coils. It is set up just fine, and should do a good job cooling and dehumidifying.

    Bookmark   June 23, 2011 at 7:24PM
Thank you for reporting this comment. Undo

So you are aware, the fan coil can be instructed to operate at a higher airflow setting if you want more airflow. I think it's a matter of the installer selecting the "comfort" (350 cfm/ton) or "efficiency" (400 cfm/ton) airflow setting.

    Bookmark   June 23, 2011 at 7:26PM
Sign Up to comment
More Discussions
Bad TXV valves (2 in a row) on brand new unit
Just got a XR15 Trane HVAC unit installed last week....
Honeywell th6320R Thermostat
My Honeywell TH6320R thermostat (communicating with...
Blown in insulation vs spray foam
I am looking for advice. I have a home built in 2000...
Does Air Duct Cleaning really help?
We live in a 40 year old home with a forced air gas...
Replacing heat pump and keeping current air handler....
Well the good news is we are being blessed with a new...
People viewed this after searching for:
© 2015 Houzz Inc. Houzz® The new way to design your home™