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Ecobee premium thermostat with two stage trane/variable speed blower humidity settings
Posted on 7/8/22 at 8:37 am
Posted on 7/8/22 at 8:37 am
I have a xr17 condenser and a xv80 furnace blower. Installer didnt set any dip switches correctly per manual and just left them all to off leading to not optimal performance. I was able to change blower fan speed to low per dip switch to somewhat help with humidity issues.
Installer also setup the wiring as if it was a two compressor system instead of a 2 step scroll single compressor system. The main difference is Y2 wire is supposed to be hooked up to the BK terminal along with Y1 going to Y, and not the Y/YLO terminals like the 2 compressor system calls for. I believe this is causing my blower to operate at 50% instead of 70% in stage one.
The other side effect of this is I cannot activate comfort r setting without the BK terminal and a jumper from R to O.
Does anyone have any experience setting up an ecobee with the variable speed blowers? If so, how did you wire it? I believe there’s a way to hijack the dehumidifying features on ecobee to use comfort r on the trane furnace but I haven’t found any concrete evidence.
Installer also setup the wiring as if it was a two compressor system instead of a 2 step scroll single compressor system. The main difference is Y2 wire is supposed to be hooked up to the BK terminal along with Y1 going to Y, and not the Y/YLO terminals like the 2 compressor system calls for. I believe this is causing my blower to operate at 50% instead of 70% in stage one.
The other side effect of this is I cannot activate comfort r setting without the BK terminal and a jumper from R to O.
Does anyone have any experience setting up an ecobee with the variable speed blowers? If so, how did you wire it? I believe there’s a way to hijack the dehumidifying features on ecobee to use comfort r on the trane furnace but I haven’t found any concrete evidence.
This post was edited on 7/8/22 at 10:49 am
5
Posted on 7/8/22 at 8:52 am to Fox McCloud
I think i have the same ecobee as you, On my Bosch dual fuel variable speed heat pump, The fan speeds are controlled by the cooling outputs- Y1 energizes the fan in low speed, Y2 kicks it into high. I haven't looked into it, but think Fan On brings the fan on in circulation mode, very low speed.
This post was edited on 7/8/22 at 8:53 am
Posted on 7/8/22 at 8:52 am to Fox McCloud
I have a carrier infinity and bought an ecobee. Had to return it. There was some sort of way to get it to work but woule lose variable speed.
Posted on 7/8/22 at 9:09 am to Fox McCloud
Trash that. Get a Honeywell. And find a new AC company.
Posted on 7/8/22 at 9:33 am to Fox McCloud
quote:
Installer also setup the wiring as if it was a two compressor system instead of a 2 step scroll single compressor system. The main difference is Y2 wire is supposed to be hooked up to the BK terminal along with Y1 going to Y, and not the Y/YLO terminals like the 2 compressor system calls for. I believe this is causing my blower to operate at 50% instead of 70% in stage one.
I would need to investigate your installation wiring diagrams but this doesn't sound right. T-stats should be wired the same for 2 compressor or 2-stage single compressors. The condensers were designed to work with standard t-stats and that is how a standard t-stat works. Y1/Y2 or Y/YLO should be the correct terminals.
Comfort R should be based on dipswitch settings and nothing to do with your wiring.
This post was edited on 7/8/22 at 9:34 am
Posted on 7/8/22 at 10:07 am to notsince98
So the notes on the side of the field wiring diagram say you cannot engage comfort r without enabling the BK terminal, which requires a jumper between R and O.
Two stage one compressor field wiring setup
Two stage two compressor field wiring
Low voltage hook up diagram
Current wiring on furnace board
Two stage one compressor field wiring setup
Two stage two compressor field wiring
Low voltage hook up diagram
Current wiring on furnace board
Posted on 7/8/22 at 10:18 am to Fox McCloud
have you cut the required jumpers?
And the BK on the furnace makes more sense. BK on the condenser just didn't make any sense. I think the furnace is this way because 2 compressor condensers had a 50/100% split where at 2-stage single compressors are 67/100% splits.
And the BK on the furnace makes more sense. BK on the condenser just didn't make any sense. I think the furnace is this way because 2 compressor condensers had a 50/100% split where at 2-stage single compressors are 67/100% splits.
This post was edited on 7/8/22 at 10:22 am
Posted on 7/8/22 at 10:47 am to notsince98
Right exactly I’m supposed to be at 70% in stage one. I haven’t cut anything because I’m not 100% on what to do on the thermostat side. Do I just swap what’s on Y on the furnace over to BK and then take what’s on YLo and put it on Y?
Trying to figure out how I can have my furnace work as a dehumidifier on the ecobee side
Trying to figure out how I can have my furnace work as a dehumidifier on the ecobee side
Posted on 7/8/22 at 12:13 pm to Fox McCloud
quote:
Right exactly I’m supposed to be at 70% in stage one. I haven’t cut anything because I’m not 100% on what to do on the thermostat side. Do I just swap what’s on Y on the furnace over to BK and then take what’s on YLo and put it on Y?
Just take T-stat Y1 and run it to Y on the furnace and Y1 on the condenser. Take The t-stat Y2 and run it to BK on the furnace and Y2 on the condenser.
quote:
Trying to figure out how I can have my furnace work as a dehumidifier on the ecobee side
The AC is your dehumidifier. If your t-stat can slow down the blower for extra dehumidification, that usually requires an "extra" wire connection and the cutting of a jumper. I would not worry about that at this point. You have a 2-stage condenser and the benefit of that is better dehumidification with normal operation.
If your condenser is not oversized, proper CFM settings at the furnace along with comfort R setting will keep your humidity levels in check just fine. I'd recommend doing this before trying to enable the t-stat to slow down the blower motor. This feature is really more helpful for people with single stage systems.
Posted on 7/8/22 at 12:19 pm to Fox McCloud
is your XR17 a heat pump or AC? I can't believe Trane has the same model number for a heat pump and AC but by golly they do. That impacts your wiring need for the O terminal and whether you need to cut a jumper.
Posted on 7/8/22 at 12:57 pm to notsince98
Thanks for all the info super helpful, it’s an ac
Posted on 7/8/22 at 1:10 pm to Fox McCloud
quote:
Thanks for all the info super helpful, it’s an ac
OK. So I think the picture is more clear now:
T-stat........Furnace.......AC
R---------------R
G---------------G
W1--------------W1
W2--------------W2
Y or Y1----------Y----------Y1
Y2--------------BK----------Y2
B or C ---------B/C---------B (does the Ecobee have "B" terminal or is it "O/B"?)
R and O may need to be jumpered at the furnace but lets see if this will at least get you proper stage 1 and stage 2 cooling first. The furnace board should be able to tell you what CFM you are getting when each stage is running to help verify. So anything about comfort R and humidistat can be disabled or left unconnected.
This post was edited on 7/8/22 at 1:12 pm
Posted on 7/8/22 at 3:29 pm to notsince98
Ok going to attempt this, it has O/B
Posted on 7/8/22 at 3:44 pm to Cajun367
quote:
Get a Honeywell.
Posted on 7/8/22 at 5:50 pm to CAD703X
Not gonna happen. Got it wired to Bk now. The way he had it wires it didn’t match up with any diagrams. He already had Y1 calling y but Y2 was calling ylo. Can’t be good for system when second stage is using ylo, not sure if stage one was ever running below 70% but no way stage 2 was doing anything. Thanks for all the help and next I’ll do the r to o jumper with the dip switch for comfort r
Posted on 7/9/22 at 5:12 pm to Fox McCloud
Why not just use a trane thermostat?
Posted on 7/9/22 at 8:34 pm to jmkidder
Because I already have the premium ecobee and it’s far superior as a thermostat. The room sensors are amazing
Posted on 7/10/22 at 9:56 am to Fox McCloud
You paid an AC company for install get them back out there if they did it wrong to do it right
This post was edited on 7/10/22 at 9:57 am
Posted on 7/10/22 at 12:34 pm to baldona
I already fixed it. I don’t trust them at this point. What I’m doing is behind the basics and most techs don’t give a frick about dip switch settings and comfort-r
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