View Full Version : Carrier Infinity Fan Question
06-27-2009, 02:40 PM
I recently installed a new Carrier Infinity heat pump system. During the summer I like to run the fan constantly, even between cooling cycles. But I am confused by the Infinity controller.
The Infinity system allows the HP and fan unit to communicate and pick the proper speed for the outside unit and the indoor fan. The control has four settings: Auto, Low, Medium and High. If I set the fan for low, so that it runs all the time, will it revert to automatic operation during those periods when the cooling equipment is actually running, or will I be stuck in the manually selected mode all of the time? If so, is there a way to have a manual setting for the fan when the cooling equipment is not running and then allow it to switch to automatic fan speed selection when the cooling clicks on?
Runs in speed selected only when not in a cooling mode,it will select the proper cfms in cooling mode.
However running the fan in the off cycle will add some humidity from the wet coil back to the home.
06-28-2009, 06:35 PM
In your Infinity controller you will be able to set the time and day's when to run your furnace in both heat & cool mode as you will also be able to set when the fan runs and what speed to run the fan at in the scheudle of set time. Like Dash said in the summer it's not a good idea to run the fan 24/7 when the AC is running, unless it's a nice dry day outside and the AC hasn't needed to run then I would run the fan.
When you do run your fan when cooling your blower should shut down for a few minutes to allow the moisture to run off the coil before it runs again, there's alot of settings in the controller to set, however if you just recently has this installed call your contractor back and have him program it the way you would like. You also might want to have him show you how to set everything should you decide there needs to be a change down the road.
I have been running they system on hold, w/ the fan set to medium. Recently, I noticed the fan has been cutting off. I don't recall it doing this before, but I saw your post saying it will cut off for a few minutes after cooling, to allow condensation to drain? To drain off the coil? How long will it cut off? It it possible to override the cut-off if I am not concerned about the extra humidity?
07-20-2010, 01:26 PM
I too have one of these Infinity systems and the darn thing has a brain of its own, and constantly overides mine :( I seem to find mine cuts off for about 5 minutes. It runs at 1280 CFM no matter what I want it to run at when cooling, and then after the pause will run at 1475 CFM with no cooling. Sure would like to run it at 1475 or even 1600 CFM during cooling as we need more airflow in the house - but it has decided that it is boss and we can go to ....... :)
That brain of its own thing is a whole different problem. I would have never gotten this system/thermostat if I had known how little control it wants me to have, including even knowing how to set up and read the info available. However, I was told I could run it on hold (cooling) w/ fan on manual but recently i have noticed the fan cutting off. I am not sure if that is "normal" and has been happening all along, or is something new/wrong. Thanks.
07-20-2010, 03:21 PM
Same issue here, I have been told by the experts that there is no way to control the fan like an old fashion stat does. The auto/high/med/low fan switch only functions when the unit is not in cooling mode.
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