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  1. #1
    Join Date
    Jan 2006
    Posts
    49

    Infinity vs Any 2-Stage Thermostat

    I've only just discovered that my Infinity's two-stage burner requires a two-stage thermostat, but a conventional thermostat was installed in this new home. The burner was one of the reasons I selected Infinity. I've read earlier posts in which many professionals backed the Infinity thermostat. However, when I check the Carrier site, many bells & whistles are listed but facilitating the two-stage burner isn't even mentioned!

    I'm looking for optimum utilization of the variable speed blower and two stage burner. Is the Infinity control still best at doing that compared to a (less expensive) Honeywell two-stage thermostat or others brands? Thanks.

    Jed in Wisconsin, where it's +3 F and heading dowwwwwn.
    Last edited by theshadow; 02-02-2007 at 11:52 PM.

  2. #2
    Join Date
    Dec 2006
    Location
    Fayetteville,Arkansas
    Posts
    1,427
    The Infinity furnace will manage the second stage heat using plotted algorythyms determined by the length of the heat call, demand of the heat call and will it reach and or maintain set point in the low heat stage if not it will then stage up to second stage heat. The results of all these calculations will determine if the next heat call will start out as low heat or high heat. This happens with every call for heat. So yes you can still have first and second stage operation with a single stage thermostat.
    But a two stage stat will control it even more efficeintly.

  3. #3
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Infinity control is what I'd want to manage the two stage heat ,along with everything else it can do.

    Better comfort IMHO,with Infinity,it maintains temps closer to the set point then two stage stat.

  4. #4
    Join Date
    Jan 2002
    Location
    Ft.Worth,Tx
    Posts
    4,581
    Quote Originally Posted by theshadow View Post
    I've only just discovered that my Infinity's two-stage burner requires a two-stage thermostat, but a conventional thermostat was installed in this new home. The burner was one of the reasons I selected Infinity. I've read earlier posts in which many professionals backed the Infinity thermostat. However, when I check the Carrier site, many bells & whistles are listed but facilitating the two-stage burner isn't even mentioned!

    I'm looking for optimum utilization of the variable speed blower and two stage burner. Is the Infinity control still best at doing that compared to a (less expensive) Honeywell two-stage thermostat or others brands? Thanks.

    Jed in Wisconsin, where it's +3 F and heading dowwwwwn.

    Need to check to see if that furnace was manufactured to use the Infinity controller or was it produced before.
    I like the controller for it's ability to sense cycles of heat and adjust, more even temperature this way .

    I would also recommend Honeywell Pro 8000. 8621
    "Everyday above ground, is a good day".
    "But everyday that you have made a difference in someones life, may insure you stay above ground a little longer".<aircooled>

  5. #5
    Join Date
    Jan 2006
    Posts
    49
    Aircooled, I don't have the S/N or model # handy, but it was installed only last summer and based on what the contractor said, the furnace would be compatible with the controller.

  6. #6
    Join Date
    May 2004
    Posts
    1,462
    Your furnace should be compatible with the INfinity control. The Infinity control will control the 2 stages.
    If all else fails....Try reading the directions!

    Tell it like it is and let the chips fall where they may.

    Any views or opinions stated here are strictly my own.


  7. #7
    Join Date
    Mar 2003
    Location
    PA/DE area
    Posts
    1,535
    Infinty rules!!!
    It's NOT the BRAND,it's the company that installs it!!!!!

  8. #8
    Join Date
    Oct 2005
    Location
    Minneapolis
    Posts
    22
    My Infinity furnace was originally installed with a cheap single stage thermostat. The furnace worked fine with it and provided a lot more comfort than our ancient single stage furnace. The controller board on the Infinity has the smarts to operate with single stage thermostats.

    Now I have an Infinity control on it and that works fine too, plus I like all its added features. In theory it can do a better job of regulating the temperature but the improvement is subtle enough that I can't really tell. I'm very happy with the Infinity control but wouldn't try to sell it on the basis of it doing a better job controlling temperature alone.

    For me, I very much like the outside air temp and humidity display right on the unit, the automatic control of humidity level based on outdoor air temp, the diagnostic capability, and how nice the setback/vacation modes are configured. And it does a great job of holding to the setpoint!

    Jon

  9. #9
    Join Date
    Jan 2006
    Posts
    49
    Well, this is strange. The thermostat was malfunctioning as it was (showing temperatures all over the map), so the contractor sent someone to change it out. Instead of the Infinity, they installed the Honeywell Pro TH4110D, which is another single-stage thermostat.

    They told my wife (1) it was less expensive than the Infinity; (2) which I don't need because I don't have a two-stage AC (the AC is a Comfort series). I know the Honeywell is less expensive, but (rhetorical question) why wouldn't they have used the 2-stage version (TH4210D) to match the two-stage Infinity furnace?

  10. #10
    Join Date
    Jan 2007
    Location
    bowie md
    Posts
    116
    they used what was on thier truck.

  11. #11
    Join Date
    Dec 2002
    Location
    Rochester, MN
    Posts
    5,304
    I'd ask them to put in a two stage t-stat... if you got the wires for it in the wall.

  12. #12
    Join Date
    Jan 2007
    Location
    bowie md
    Posts
    116
    Infinity control only needs 4 wires

  13. #13
    Join Date
    Jan 2007
    Location
    bowie md
    Posts
    116
    infinity control can still be used with 1 stage cool

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