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Old 05-27-2012, 04:40 PM   #1
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XC95M thermostat setup, two or three stage?


Anyone out there a trane insaller able to answer this?

the XC95M I had installed in one of the houses is "fully modulating" not the old three stage modulating one... it's the latest model... it requires the TCONT900 thermostat to be communicating... I had both installed

the installer setup manual has this setup option though

Heater Stages - 0180
E - Auto Discover
0 - None (why even have none as an option?)
1- Single Stage
2 - Two Stage
3 - Three Stage

auto discover has the value 0, which is odd.. now this does modulate at odd percentages on the status screen... I've seen it at 40%, 60% 100%, 55%, 63% 70% etc.. so its not just doing two stage, its doing full modulating...

what would setting it to three stage do? I know the older XC95's where three stage modulating... should this be on two or three stage?

The thermostat manual says it has to be set at a minimum of 1 stage Heat, yet autodiscover has zero


Last edited by BlueBSH; 05-27-2012 at 05:07 PM.
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Old 05-27-2012, 06:10 PM   #2
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XC95M thermostat setup, two or three stage?


Probably should be on 0 since it has no stages.

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