Carrier Infinity Thermostat - Compartability

[serik]

Hi, I have a Carrier Infinity 96 furnace and 1 stage Carrier AC.
I am wondering if Infinity thermostat would work with my equipment? From what i have found, it has 4 wires ABCD bus and a connection diagram always includes a damper module.
I don’t have a budget for a damper module and dampers at the moment but would like to install those in the future.
Can i just hook up an infinity thermostat directly to Infinity furnace with those 4 wires?
Thanks a lot!

[Daltex]

It may or may not communicate with the condenser outside. It will communicate with the furnace. Post model number of the outdoor unit.

[crzymtrbiker]

I sell Bryant Evolution which is the same as Carrier Affinity and I can tell you for sure that it will work with your furnace, You A/c however would have at least to be a 15 seer to have that technology in it!

[serik]

My AC model is 24ABR330A320.
I believe its 2.5 ton unit, Carrier but not an Infinity line.
So I am debating if Infinity thermostat is worth the money?
As far as I understand it will give me a fan speed control, humidity control, outdoor temperature reading (if I install the sensor) and a possibility of installing zone control module in the future.
What am I losing by not going with Infinity line condenser, except for 2 stage operation in cooling mode?

[MoveOver]

I had a similair setup in an addition and guess the contractor cheaped out and did not install the Infinity Thermostat. Had problems with the upstairs not being as cold in the hot weather as the downstairs. We had an Evolution System installed as a replacement in our main house, it included a Evolution Thermostat. After I experienced the full capability of the Evolution System, installed the InfinityThermostat in the addition and the temperature is more even between the upstairs and downstairs. Also noticed that the system seems to be running at a slower speed, it might run slightly more but it is hard to tell, but the increased comfort is worth it.

[DanW13]

I would urge you to definately get the Infinity controller for your furnace/AC it will be money well spent and allow you to take full advantage of all the features the Infinity systems has to offer. Unless your outdoor condenser is a communicating unit it will not talk with the furnace but the controller will have no problems running the outdoor unit along with the furnace, you will be able to have a few features like shutting the blower off for a couple of minutes to allow the moisture to run off the coil before the blower comes back on which reduces the humidity in the home.

It will also run the furnace to it's full potential and more than likely your furnace will run in low fire approximately 60%-70% of the time where the balance of running time will be almost split equally between medium and high fire. To hook this stat up all that is needed depending on how many wires you currently have coming in to your existing stat is a pig tail plug, so if you have just 3 wires it will run just the same as if you had 4 wires. that's a very nice piece of equipment you have, how do you like your's ?

[serik]

Furnace is nice but contractor did a crappy job installing it, and chipped out on thermostat. I currently have a 2 stage Honeywell, its ok, but I think it should not use 2nd stage as much as it does and no fan speed control.
Original contractor did not use mastic, sealed joints with tape and some joints are only sealed half way. Combustion air and flue pipes were not glued with pvc cement at some joints... Flex ducts are mess, all are on top of each other and bent, etc
Then builder ran a test and hvac leaks were too high, so he brought in another contractor who dumped in a bunch of silicone and tons of duct tape to patch it but di not fix original defects, wel lduct tape pealed off in 1 year... I am very unpleased with my heating bills...
Anyways now we are converting attic to the living space, adding spray foam insulation to the roof deck and replacing a bunch of ducts with sheet metal ones. All the duct work will be inside of a semi conditioned space.

[DanW13]

What a shameto spend that kind of money on a nice piece of equipment only to have some hack come in and ruin your day and create more work then what you paid for the whole system.

[serik]

I wish I would know more about all that stuff at the time we were building the house. I don’t even know how much my HVAC system costs, we just paid a lump sum for the house. Builder advertised 96% efficient furnace as a standard option, so I went for it.
Turned out they were cutting corners in other places. First HVAC contractor did not put any tape at all, so, the 2nd put tape after the ceiling was up, obviously he did not get all the way around. and the 3rd added tape after blown insulation was there... obviously it got dusty and pealed off... Original builder had those guys to come after we moved in because ducts did not pass the test and he could not get a tax credit.

[serik]

Alright, here are 2 choices:
1. SYSTXCCUID01 - this does not support zoning
2. SYSTXCCUIZ01 - this one supports a damper control module SYSTXCC4ZC01

My question is, if I go with an option 2 for the stat and dont install a damper control module at this time, will it work without it?

[danielworkerbee]

I know the Infinity thermostat will work with your existing system, but would not work if you upgraded to the damper control module ( throw away ). And the Infinity control for a zoned system has to be used with the zone control module, which would be worth the additional cost up front if your going to add the zoning later.
Also your Honeywell t-stat will cycle your blower thru high-medium-low speeds, just push the "fan" button 'on - off - on' should be medium speed. It will take a couple of tries to sense / hear the different airflow.
In the future when you change the t-stat to "auto" for non-operation and any time late change to fan "on" the t-stat will know the previous setting.

good luck, dan

[serik]

Alright I am pretty convinced that SYSTXCCUIZ01 or SYSTXBBUIZ01 would work with my furnace without any other module.

Funny, one contractor just tried to sell me a NIM along with the stat, kept telling I need it because my 1 stage AC does not have ABCD bus. As far as I know its only needed for 2 stage non communicating ACs.

Btw, Carrier troubleshooting guide tells to disconnect all the modules from the bus and hook up a stat directly into furnace in case of communication issues. This convinces me it will work without a damper control module.

I am also almost convinced that Bryant and Carrier is the same and will work with each other

[DanW13]

Bryant & Carrier are one in the same, just a different outside and the name obviously. the Infinity/Evolution controllers are both the same also and I don't think that if you had one of the controller that also runs zoning will work with or without actually having the dampers in place so there shouldn't be any worries there. But you should get the Infinity/Evolution Controller if you have a Infinity furnace o you can take advantage of most of the settings the controller does and when you finish getting the balance of the zoning system in place you'll be set and have all the proper equipment for a comfortable H/c of the home.

I think you mention having a AC that is non communicating, which here again there shouldn't be any problems with the Controller running the AC, I have the Infinity 96 58MVC 60K BTU furnace with a PAyne out door condensor and there's been no problem with the controller running it in fact the blower even shut down after the AC finishes it's call for cooling to allow for moisture to run off the coil. Everything runs just fine. Get the controller you won't be sorry.

[serik]

Just got my Bryant Evolution zone control and its Awesome!
Worked perfectly fine on a first try, no issues and no other modules required to run Infinity furnace. It just disabled zoning automatically since no damper controllers were found.

Now I can truly control my Infinity furnace.
Plus it gives me actual CFM readings, static pressure and so on. Now I can finalize my new sheet metal duct design and even compare how it performs to that undersized flex junk which was “professionally” designed and installed by a licensed “professional” ;)

Very nice toy :)