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Old 07-18-2012, 11:43 AM   #16
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Trane XL20i cycle time and dehumidify


is there any settings that could change how much of a temp rise it detects before it starts up again? it seems like its trying to keep the temp within half a degree and its going nuts trying to, is there a setting that says dont start until its a full degree off, two degrees off? etc? if so what would it be called? didn't old thermostats have a heat anticipator or somehing?

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House Information: Build 1996, 1500 sq ft basement, 1500 sq ft 1st floor, 800 sq ft 2nd floor, 560 sq ft unfinished attic space on 2nd floor. Insulation: Attic blown fiberglass, walls R-19, Basement R-19. HVAC: Trane xc95m fully modulating furnace, single zone, Trane XL20i commiunicating AC unit, TCONT900 Communicating thermostat.
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Old 07-18-2012, 02:50 PM   #17
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Trane XL20i cycle time and dehumidify


here's the installer manual for my thermostat: http://www.butcherdistributors.com/I...0installer.pdf

I have AIR (Adaptive intelligent recovery) enabled... but right now its set to be at say 75 degrees at 5pm and the ambient right now is 78... the AC will turn on at say 4:15 PM to "recovery" it's supose to be at 75 degrees at 5pm based on it learning how long the house heats and cools.... but even after this being in for a few months now, it still never hits the temp the time is set for... at 7pm it is still "recovering" and the temp never droped a degree....

I don't know if something is just set up wrong, tstat is plain bad, or the AC is undersized.... or insulation sucks.... our old AC worked with AIR settings fine with a similar honeywell thermostat... it was a 4 ton unit though, they took us down to 3 tons because 4 was apparently oversized for the house... they did the manual J, I have a copy of it.... ducts where all resized by the manual D calcs... something is just not right though
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House Information: Build 1996, 1500 sq ft basement, 1500 sq ft 1st floor, 800 sq ft 2nd floor, 560 sq ft unfinished attic space on 2nd floor. Insulation: Attic blown fiberglass, walls R-19, Basement R-19. HVAC: Trane xc95m fully modulating furnace, single zone, Trane XL20i commiunicating AC unit, TCONT900 Communicating thermostat.
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Old 07-18-2012, 09:05 PM   #18
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Trane XL20i cycle time and dehumidify


The IAQ will keep the temp within 1 of set temp. that .5 above or below set temp. It has no swing setting.
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Old 07-20-2012, 10:23 AM   #19
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Trane XL20i cycle time and dehumidify


well leave it to nature to get in the way, changed the cycle times again and it hasn't gotten hot enough in the house to even turn on the AC since then... had days of rain now cooling everything off
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House Information: Build 1996, 1500 sq ft basement, 1500 sq ft 1st floor, 800 sq ft 2nd floor, 560 sq ft unfinished attic space on 2nd floor. Insulation: Attic blown fiberglass, walls R-19, Basement R-19. HVAC: Trane xc95m fully modulating furnace, single zone, Trane XL20i commiunicating AC unit, TCONT900 Communicating thermostat.
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Old 08-02-2012, 11:39 AM   #20
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Trane XL20i cycle time and dehumidify


well yesterday after the changes have been in place for a while finally got hot enough, it was only 89 degrees outside, the thermostat was set that by 5pm it should of been 73 degrees in the house, it was 75 when I got home at 5 cooling was only in 1st stage, it never went to 2nd stage.. as of 11pm it was still 75 degrees... AC ran non-stop from 3pm till 3am trying to cool...

the people that installed it checked it, said its working right, the temp delta is in spec from return to supply... just cant figure out why its staying in stage 1 so long and not going to stage 2 when it knows its not dropping in temp...

already scheduled an insulation person to check the insulation in the house just incase its not what it should be and heat gain is higher then it should of been... the whole house was calculated out by the building specs R-19 walls, R-38 ceilings, double pain low e windows, insulated core doors, etc.. who knows maybe the builder skimed somewhere (already found an entire ceiling attic space that was closed off that wasn't insulated at all once)...
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House Information: Build 1996, 1500 sq ft basement, 1500 sq ft 1st floor, 800 sq ft 2nd floor, 560 sq ft unfinished attic space on 2nd floor. Insulation: Attic blown fiberglass, walls R-19, Basement R-19. HVAC: Trane xc95m fully modulating furnace, single zone, Trane XL20i commiunicating AC unit, TCONT900 Communicating thermostat.
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Old 08-02-2012, 03:11 PM   #21
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Trane XL20i cycle time and dehumidify


Something is messed up with your thermostat.
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Old 08-13-2012, 08:11 AM   #22
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Trane XL20i cycle time and dehumidify


completely reset the thermostat again and its working normally again... did the factory resets in the installer service menu. Last time I did that, did the same thing then gradually went back to not working. if it does this again, something is definatly up with the t-stat

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House Information: Build 1996, 1500 sq ft basement, 1500 sq ft 1st floor, 800 sq ft 2nd floor, 560 sq ft unfinished attic space on 2nd floor. Insulation: Attic blown fiberglass, walls R-19, Basement R-19. HVAC: Trane xc95m fully modulating furnace, single zone, Trane XL20i commiunicating AC unit, TCONT900 Communicating thermostat.
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