Nest learning thermostat with trane xr80 furnace
#1
Member
Thread Starter
Join Date: Oct 2019
Posts: 9
Upvotes: 0
Received 0 Upvotes
on
0 Posts
Nest learning thermostat with trane xr80 furnace
Hi
i have just had a lengthy and frustrating chat with google re the compatibility of the nest learning thermostat and the Trane xr80. Their conclusion was it was not compatible, but i see online posts saying it is. Who should I believe? I would appreciate any advice on this. I have attached a picture of the wires from my current thermostat.
i have just had a lengthy and frustrating chat with google re the compatibility of the nest learning thermostat and the Trane xr80. Their conclusion was it was not compatible, but i see online posts saying it is. Who should I believe? I would appreciate any advice on this. I have attached a picture of the wires from my current thermostat.
Last edited by PJmax; 10-14-19 at 11:44 PM. Reason: removed link
#2
Welcome to the forums.
That picture location is IN your phone.
You need to download it to here..... How-to-insert-pictures.
What model of nest ?
That picture location is IN your phone.
You need to download it to here..... How-to-insert-pictures.
What model of nest ?
#4
Member
That’s just a conventional thermostat, most any over the counter control will work.
I highly advise against using the nest.
I highly advise against using the nest.
#5
I'm not so sure that's a conventional thermostat. It looks like both the O and B terminals are used. Can't see what the blue wire is on. That would indicate a possible zoning system in use.
R ---------------> red
W ---------------> white
Y ---------------> yellow
? ----------------> blue
O ---------------> orange
G ---------------> green
R ---------------> red
W ---------------> white
Y ---------------> yellow
? ----------------> blue
O ---------------> orange
G ---------------> green
#7
Member
That’s a good catch. I didn’t note both of those wires connected.
OP, do you have a zoned system? What one do you have?
OP, do you have a zoned system? What one do you have?
#8
Member
Thread Starter
Join Date: Oct 2019
Posts: 9
Upvotes: 0
Received 0 Upvotes
on
0 Posts
It is zoned but disconnected at the furnace as I think there are issues with the damper motors. So right now this one thermostat controls the whole house for heat and air conditioning
#9
Member
Will the zoning be reconnected?
Nest doesn’t play well with zoning.
The nest thermostats in general have a lot of quirks and problems that users deal with.
Nest doesn’t play well with zoning.
The nest thermostats in general have a lot of quirks and problems that users deal with.
#11
One final question..... is that a Trane thermostat ?
B on a Trane stat is actually C (common)
If the zoning board is disconnected...... you can use the nest.
If the zoning board is still controlling logic..... you can use the nest but you will also need a relay to set the heat/cool mode.
B on a Trane stat is actually C (common)
If the zoning board is disconnected...... you can use the nest.
If the zoning board is still controlling logic..... you can use the nest but you will also need a relay to set the heat/cool mode.
#14
If the zoning board is not connected..... the thermostat wires would have to be spliced thru.
Going to need a picture of the zoning board and the low voltage connections at the furnace.
Sorry it's not easier but there are too many variables to just guess at.
Going to need a picture of the zoning board and the low voltage connections at the furnace.
Sorry it's not easier but there are too many variables to just guess at.
#17
Pictures are ok. Modified as needed.
Confirm the following connection.
Thermostat one connections.
Y -------> yellow
R -------> red
W -------> white
O1 ------> orange
G1 ------> green
B1 ------> blue
System connections
Y ----------> yellow
G ---------> green
Rh -------> red
W --------> white
There is a red wire also on Y. Does that red wire go into that ??? cable ?
If yes..... what is the other color in that cable ?
It looks like black may be that color connected to a blue wire in the equipment cable.
Assuming you are bypassing the zoning board and blocking both dampers open manually.
What model nest ?
MM2 mastertrol zone control (pdf) manual
Confirm the following connection.
Thermostat one connections.
Y -------> yellow
R -------> red
W -------> white
O1 ------> orange
G1 ------> green
B1 ------> blue
System connections
Y ----------> yellow
G ---------> green
Rh -------> red
W --------> white
There is a red wire also on Y. Does that red wire go into that ??? cable ?
If yes..... what is the other color in that cable ?
It looks like black may be that color connected to a blue wire in the equipment cable.
Assuming you are bypassing the zoning board and blocking both dampers open manually.
What model nest ?
MM2 mastertrol zone control (pdf) manual