New XV90 install, Comfort-R question
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  1. #1
    Join Date
    Jan 2006
    Posts
    25
    I've recently had XV90 with XR13 A/C installed in my house and wander if it set up correctly for Comfort-R. Installer set up deep switches on the control board for Comfort-R operation (5,6 - ON) but didn't put any jumpers between Y-0 or Y-R. I got single stage thermostat White-Rodgers 1F90-371, might upgrade to 2 stage stat (still debating). Was installer supposed to set jumpers for my configuration or not? It is a little early in the year to worry about A/C operation by I wanted to know ahead of time. I'll have A/C checked before the cooling season to ensure that it operates properly. Furnace appears to be working OK. It wasn't cold here in Ohio since the install. At 28-30 degrees outside furnace would come on for 10-12 min with 15 min off time. Is it normal?

  2. #2
    Join Date
    Dec 2005
    Location
    Newton, NJ
    Posts
    299
    5,6 on is correct for comfort-R enhanced operation. You have 2 stage heat but single stage ac so if you are using a single stage stat for heat there should be a jumper between w1 and w2 but no jumper for Y. Definately get a 2 stage stat or you will only get stage 1 for 12 min and then stage 2 until the call is satisfied. Properly set up 2 stage stat will only call for stage 2 if stage 1 can't meet the call and can also drop back to 1st stage when approaching room setpoint.

  3. #3
    Join Date
    Dec 2002
    Location
    Rochester, MN
    Posts
    5,304
    They need to put a jumper between Y and O for comfort R to work right. and get a two stage stat on that nice furnace.

    Look at the Vision Pro 8320 for best comfro!

    I have this and best comfort I ever had with forced air system all my life.

  4. #4
    Join Date
    Dec 2005
    Location
    Newton, NJ
    Posts
    299
    My techs are setting up the furnaces now, but I don't remember putting a jumper between y and o. What is the O terminal for on a furnace?

  5. #5
    Join Date
    Jun 2001
    Location
    Louisville, KY
    Posts
    12,132
    Let's the furnace know there's a call for cooling and allows the blower to follow the comfort-r ramp. No O signal - blower skips the 80% portion of the ramp. Keeps head pressure down on dual fuel applications.
    Perhaps you should have read the instructions before calling.

  6. #6
    Join Date
    Dec 2002
    Location
    Rochester, MN
    Posts
    5,304
    jrbenny is right. if this is not done, the blower will ramp up to full speed. O is also can be wired in with a humidistat to keep the blower at a slower speed to remove the humidity.

  7. #7
    Join Date
    Jan 2006
    Posts
    25
    Does O need to be connected to Y? I read something here about Y to be connected to R instead. What is the difference and which one is correct?

  8. #8
    Join Date
    Jun 2001
    Location
    Louisville, KY
    Posts
    12,132
    You need to call the installer. You don't need to connect anything. The installer needs to read the wiring diagram in the service facts.
    Perhaps you should have read the instructions before calling.

  9. #9
    Join Date
    Dec 2002
    Location
    Rochester, MN
    Posts
    5,304
    Originally posted by lucky777
    Does O need to be connected to Y? I read something here about Y to be connected to R instead. What is the difference and which one is correct?
    Yes, it needs to be if you want the full effect of Comfort-R.

    They better not done Y and R,, otherwise, your A/C is running all times. Where did you read that at?

  10. #10
    Join Date
    Jan 2006
    Posts
    25
    I'm not going to connect anything by myself and want installer to do the work. I specifically asked him about jumpering Y to O and he didn't think that it was required. I wanted to clarify that before his next visit in Spring for A/C final check. I have XV90 installation guide and couldn't find anything about jumpering Y to O. If you have guide handy can you point me to the correct page in there so I can show that to installer?

  11. #11
    Join Date
    Jun 2001
    Location
    Louisville, KY
    Posts
    12,132
    Wiring diagram notes. Last note on each diagram. And thanks for not working on this yourself. My post seems a bit harsh after I read it again.
    Perhaps you should have read the instructions before calling.

  12. #12
    Join Date
    Jan 2006
    Posts
    25
    I must have different guide version. Last note doesn't say anything about jumpers. I found this guide http://www.aireng.com/clientuploads/...urnace/tuy.pdf


    It is different then mine but also doesn't clearly state need to jumper O to Y.

  13. #13
    Join Date
    Dec 2002
    Location
    Rochester, MN
    Posts
    5,304
    Note #9 tells about jumping the Y-O..

    Wonder how many other furnace they have out there with this not being done?

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