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calween

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Discussion starter · #1 ·
Hey Everyone,

New to the forum here but I have the typical question that needs answering concerning my AC cycling times. I know there have been many topics about this based off my research but I thought I'd just start my own thread as my issue can be specified by you professionals out there.

Firstly, a little about my system (I know my following question will fall under the "it depends" category, but based off your past experience is this normal?) system is as follows:

Ecobee3 thermostat
Trane XL80 Furnace
3 Ton, 16 SEER, AC Night and Day Compressor (installed 2 weeks ago)
~2000 sq ft bi-level home built in 2006

So based off of the Ecobee3 readings about my system during the times (12pm-11pm-ish) it was currently averaging around 27C - 30C where I live (80.6F - 86F). It seems as though my AC unit would be on for approximately 20 - 45 minutes, then shuts off for 10-15 minutes, then run again for about the same time give or take 10 minutes each way. When the sun sets, it seems to be on for 10-25 minutes and turn off for about 10 - 20 minutes but average temperature outside is 25C (77F). So that gives me an approximation of roughly 2-3 cycles per hour on an 27 degree day with about 40% humidity outside. My thermostat is set to have the temperature at 23C (73.4F) the differential between when it turns on and turns off is 0.3C so that means it should turn on at 23.3 (73.94) and turn off at 22.7 (72.86).

Basically, I am just wondering if you all think this is normal or is this indicative of an over/under sized compressor? My main concern is if this is going to be utilizing a ton of electricity as I am aware (based off research) starting the system consumes the most amount of electricity as well as the cycling can affect the life span of the unit itself. Or would your recommendation be setting the temperature differential a little higher?. Any help would be greatly appreciated!

Thanks
 
Discussion starter · #3 ·
Hey. Thanks for the quick reply!

It seems like there is no setting for cycles per hour on my thermostat but I can adjust the swing in this case. So would you recommend increasing the swing? Or is the current cycle times for the AC unit appropriate given the information provided?
 
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