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  1. In my first conversation with a Ruud contractor,...

    In my first conversation with a Ruud contractor, he also mentioned the possibility of venting issues.

    But here's an experiment I did this morning (-6 F outside): At about 6:00 am, the...
  2. To avoid any vagaries, I turned off the...

    To avoid any vagaries, I turned off the intelligent recovery feature of the thermostat. So, at 6:00 am the furnace set point was changed from 65 to 68 (and was kept at 68 thereafter), with the...
  3. See other post for more info on the furnace. My...

    See other post for more info on the furnace. My concern is not the long recovery time; I think the furnace is adequate but with little reserve power. My concern is the dip in temperature as the set...
  4. Thanks! I really think this issue is with the...

    Thanks! I really think this issue is with the thermostat, too. It seems that it has had a history of issues, see http://hvac-talk.com/vbb/showthread.php?t=439932
  5. No one seems to have experience with the...

    No one seems to have experience with the Rheem/Ruud modulating furnace. The Ruud dealers I have talked to are reluctant to do anything after I have described the problem with them.
  6. Thanks for the reply, ampulman! I hope some...

    Thanks for the reply, ampulman! I hope some other Rheem/Ruud Modulating guys will also chime in.

    The current furnace is the UGFD-07EMCK rated at 75,000 BTU/HR input (at 92% efficiency?). It...
  7. More observations...

    Thanks for the replies. I will get back with some more answers soon. First, some more information on this problem.

    This morning was also cold (-12), and the system did it again, i.e., heated the...
  8. Strange behavior modulating furnace w/WR thermostat

    Hello! I received extremely helpful advice form this forum when I had a Ruud modulating furnace in 2006 (the installer had no idea of what he was doing). They installed the just-then-introduced...
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    Jumping in with a question

    Hi! This forum was extremely useful to me when I had my Ruud modulating furnace installed (by a boneheaded tech and company) in 2006. I am recently noticing some issues with the thermostat (Model...
  10. Re: Jeff-4

    Thanks for the information. Mine also does this consistently. I noticed last night that, with a 7 degree setback with the night period set at 10:30 p.m., it jumped down sometime between 9:10 and...
  11. Hello again! I have a Ruud modulating furnace...

    Hello again!

    I have a Ruud modulating furnace with a new, recently installed White-Rodgers thermostat (the modulating version set up for this furnace). I am still getting used to the behavior...
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    I do not want to pose as an HVAC expert, but as...

    I do not want to pose as an HVAC expert, but as an engineer trained in heat transfer, the argument goes like this.

    Whenever an object (like a house) is at a different temperature than the...
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    Will do! Thanks, as usual, for all of the...

    Will do!

    Thanks, as usual, for all of the excellent advice.
  14. Replies
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    Thanks for the thoughts. The temperature on the...

    Thanks for the thoughts. The temperature on the day of issue was significantly lower than the prior day. We had a classic Minnesota swing from a stretch of lows in the 30's to a low of 6 that day. ...
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    This is the first fall/winter with this...

    This is the first fall/winter with this thermostat, but it is the modulating version supplied by Ruud. The set-up instructions on it are not that clear, but it is supposed to be fully modulating the...
  16. Replies
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    I am again turning to this forum, since it has...

    I am again turning to this forum, since it has proven to be more useful than dealing with my contractor. I am still having some performance issues with my Ruud modulating furnace and White-Rogers...
  17. Replies
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    Hey Mr. Loonie (are you really bald?), I think...

    Hey Mr. Loonie (are you really bald?), I think you are a brilliant guy. The techs came by today. This time I insisted that they call me at work to explain what they did. He said that he changed...
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    More information

    This morning I did some more observing. (I have not chnaged anything from my prior post.) It turns out that the furnace is modulating, but only when it has been firing under the high heat "System...
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    I can also check this. Thanks for the advice! ...

    I can also check this. Thanks for the advice! Is there anyway I can directly contact one of those brillinat Rheem/Ruud tech support reps?
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    Thanks, I will try this. You sound like a gifted...

    Thanks, I will try this. You sound like a gifted chef and tech! At this point, I'd almost consider flying you in to help!
  21. Replies
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    I do think the furnace is set up correctly. At...

    I do think the furnace is set up correctly. At least it was working with the older modulating thermostate (the ugly one with the litlle gray display). The furnace was installed last February. I am...
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    Yes, this is the new modulating thermostat. Ruud...

    Yes, this is the new modulating thermostat. Ruud is printed on its faceplate. Ther furnace was working correcting with the old thermostat, so I assume all sensors, etc., are fine with the furnace.
  23. Replies
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    Hello experts! So my saga continues, I have...

    Hello experts!

    So my saga continues, I have posted questions previously on this furnace to this forum. Addressing my concerns that my home was heating very slowly in the morning the contractor...
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    I do not know. I am happy to ask. What do you...

    I do not know. I am happy to ask. What do you believe it should be set to?

    I think they will be coming out next week to check the furnace settings and (yay!) install the new White-Rodgers...
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    The house did get to the setpoint temperature...

    The house did get to the setpoint temperature last winter, but last winter we did not experience any significant cold spells (I believe it was the 5th warmest on record). In fact, there was never a...
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    Re: Re: Problems resolved

    So, how much did you include for duct losses at -12'F?

    [/B][/QUOTE]

    If I understand, there are no duct losses. All of the ducts for this home (and most others up here, I would guess) run...
  27. Replies
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    Problems resolved

    Again, this forum has been very helpful, and thanks to all!

    I decided that I needed to take things more completely into my own hands. I ordered HVAC-Calc (a real bargain at $49, in my opinion)...
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    Thank you! This information is important,...

    Thank you! This information is important, because it means that either my contractor is being dishonmest or he is ignorant. I can't imagine that the outdoor temperature has been revised upward from...
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    Hi! I have posted here before and received lots...

    Hi! I have posted here before and received lots of good advice. I have one simple question (and read on for other advice you can give me!):

    Could someone please let me know what Manual J,...
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    Thanks for the advice! I'll wait until September...

    Thanks for the advice! I'll wait until September and call the contractor.
  31. Replies
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    This last spring, I had a Ruud modulating furnace...

    This last spring, I had a Ruud modulating furnace installed in my home. I am happy with it, but my wife doesn't like the modulating thermostat (she thinks it is confusing and difficult to use).
    ...
  32. Just a word of thanks to all for the advice! The...

    Just a word of thanks to all for the advice! The company has returned and rectified all the venting issues to my satisfaction. Everything is copacetic. This forum has been invaluable. Thanks...
  33. The furnace is awkwardly situated in my basement...

    The furnace is awkwardly situated in my basement almost as far way from an accessible wall as possible. The block wall (South) you see is next to the garage. West is the front of the house, which...
  34. Mayguy: According to my home thermometer, we...

    Mayguy:

    According to my home thermometer, we hit -15.2. It's now warming up nicely to +2. The new furnace did fine. I was doing a test of sorts. The setback was 58, with a call for 68 at 6am...
  35. Re: venting

    This seems like the thread that will never end...

    I'm not sure what you mean by "cumbustion air is drawn from inside the house." There is a 6" vent that comes from directly outside the house and...
  36. FYI, I spoke with the company rep and explained...

    FYI, I spoke with the company rep and explained my unhappiness. He agreed to consider changes in the venting system, so I emailed pics and a diagram. It's getting down to -15 tonight, so he is...
  37. So, I did install the R-22 system. Looking...

    So, I did install the R-22 system. Looking forward to testing it this summer...
  38. Hey guys, I certainly respect your opinions, but...

    Hey guys, I certainly respect your opinions, but my analogy would be a tachometer in a car with an automatic transmission. There is no need for this information, but some of us geeks think it is...
  39. My understanding is that there is just the one...

    My understanding is that there is just the one true modulating thermostat that your dealer can install for you; all the others are one- or two-stage. But another post, "bryant evolution vs trane xv...
  40. Re: Horizontal TErmination Single Pipe

    Dear Kevin:

    The book says "Non-Direct Vent Pipe Installation (For Vertical Terminations Only)". So, Non-Direct Vent Single Pipe Horizontal Termination does not seem to be allowed.

    Thanks,
    Jeff
  41. Many thanks! I'll check the water heater...

    Many thanks! I'll check the water heater capacity. I'd buy them clear primer, but, you know, they are probably Vikings fans and would use the purple anyway..

    So, I am being a bit anal, but are...
  42. Aha, I finally found this in the instructions,...

    Aha, I finally found this in the instructions, but this note on the 60,000 and 75,000 models appears only for the Direct vent pipe installations. This note does not appear after the through-the-roof...
  43. Hello, hapless homeowner here... The vent pipe...

    Hello, hapless homeowner here...

    The vent pipe does go to the roof; here's a pic. It runs 14" above the black flange. If you look carefully, you can see that the furnace is running.
    ...
  44. I'll post a picture (see previous post). Also, I...

    I'll post a picture (see previous post). Also, I seem to recall several figures in the installation instructons showing systems without inlet pipes (i.e., taking interior air from a vented space). ...
  45. Re: Jeff

    I'll post this for you to see, but please hold on. I may not be able to get to the roof to take the picture until the weekend. I do appreciate the input!
  46. Mayguy: It's in but I am struggling a bit with...

    Mayguy:

    It's in but I am struggling a bit with the installation; see my post on "Elbows, etc., on vents; need an expert opinion!" Please chime in on the topic, if you have an opinion. (I also...
  47. Re: Re: Non-Direct Vent Combustion Air

    Hey, thanks for the info. Your statements lead me to the question of whether to ask that they install an inlet pipe. This installation replaces a system that simply used a passive 6" vent for...
  48. Thanks to everyone. I will call the installer...

    Thanks to everyone. I will call the installer and bring this to a resolution. If I have enough energy left, I'll return to tell the rest of the story. I didn't realize that replacing an HVAC...
  49. Thanks for the reply. Yes, this vent is for...

    Thanks for the reply. Yes, this vent is for combustion air makeup (rather than directly into the furnace).

    I am wondering if the unit is calibrating itself against a temperature difference...
  50. Here I am reading installtion instructions again....

    Here I am reading installtion instructions again. My Aprilaire 600 humidifier was installed with the "outdoor" temperature sensor placed in an inlet air duct (6" diameter, insulated, running about...
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