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  1. Replies
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    Yup. And best of all, he had no problem with me...

    Yup. And best of all, he had no problem with me watching over his shoulder and asking questions, chatting, etc. Can't say I've ever had a problem with a contractor or inspector that's been open about...
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    Yup, that's pretty much what he said. Think it...

    Yup, that's pretty much what he said. Think it was 48F or so out when he checked, and again, it was in heat mode. Everything seemed perfectly fine to him, and he lamented the fact he's been telling...
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    I have a 2.5ton, so reciprocating. Got it. ...

    I have a 2.5ton, so reciprocating. Got it.

    Thanks!

    Ryan, does his explanation seem reasonable?
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    on a side note, does the XL15i have a recip or...

    on a side note, does the XL15i have a recip or scroll compressor? just curious.
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    And the winner is: catmanacman There's nothing...

    And the winner is: catmanacman

    There's nothing wrong. According to the tech, subcool really only matters (in heat mode) if it were REALLY high or low. He just measured, and it was about 20. Can't...
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    yeah, got that. so the general consensus seems...

    yeah, got that. so the general consensus seems to be there shouldn't be two filter driers....
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    Not terribly comfortable with posting serial...

    Not terribly comfortable with posting serial numbers on a forum. The unit was purchased in 07, so it's still under warranty for parts then. Was there any known issues with the txv around that time?
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    k. I shall report back... anyone else with input,...

    k. I shall report back... anyone else with input, please please! Also, just went out and checked, and indeed, there are two filter driers (one on the LL as it heads to the house, and one inside the...
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    duplicate of below.

    duplicate of below.
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    okay, I'll ask about just not having it, or...

    okay, I'll ask about just not having it, or removing it. I'm guessing they put them on all the systems as part of their standard install... but who knows.

    So, how do they test for a clog, per se?...
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    Well, no idea how long it's been like this is the...

    Well, no idea how long it's been like this is the thing, other than it could have been 14 months (time between checkups). But yeah, guess a couple more days isn't really that much comparatively....
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    the system still works fine, and I was told it...

    the system still works fine, and I was told it wasn't a problem to keep using it, it's just a bit less efficient. is it a problem running it with a high subcool?

    I'll have to ask about the extra...
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    I understand, it was an example... but thanks....

    I understand, it was an example... but thanks. sorry about that.
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    Pretty sure, yes. It's on the liquid side I...

    Pretty sure, yes. It's on the liquid side I believe (the smaller, non-insulated copper tubing) just after the tubing "leaves" the HP and heads up into the house. Looks like this:...
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    Really, all of this is going off the yearly...

    Really, all of this is going off the yearly maintenance guy, where an actual repair tech/diagnosis is going to happen monday, but I don't want to just be told "yup, clogged drier, it'll be $$$" if...
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    yup, R410A. Heatpump: 4TWX5030A1000AA AH:...

    yup, R410A.

    Heatpump: 4TWX5030A1000AA
    AH: 4TEE3F39A1000AA

    And no, I don't think so. He had cleaned the coils prior. I know that's mentioned in various places, but I'm not sure how you measure...
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    Sanity check on maintenance

    All,

    I just had a yearly "checkup" on my heatpump (Trane XL15i), and they said the subcool was high (28), which does seem high (here are all the "deets")

    OD Temp: 42
    ID Temp: 69
    SL Temp: 40...
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    Thanks Mark! So, I'm curious, how does the Nest...

    Thanks Mark! So, I'm curious, how does the Nest know when to use emergency/secondary heat if it doesn't work with an outdoor temp probe?

    But heck, you answered a follow up question as well, which...
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    that wasn't snarky or anything. =P By "worth...

    that wasn't snarky or anything. =P

    By "worth it", I guess I meant, would I lose some key function of the IAQ? I didn't mean, "Would this pay for itself". I'm a geek, it doesn't need to if it's...
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    Upgrade from Honeywell IAQ 9000 to Nest

    So, subject says the gist. I'm curious if this is even a feasible upgrade, and whether or not it would even be worth it.

    Has anyone seen a system go this way? I bought the IAQ largely because it...
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    they did a load calc when they installed the...

    they did a load calc when they installed the system... though, I don't recall any of the info... I think they gave me the info, but again, not sure.

    Can you point me in the right direction and if...
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    okay. Figured there was a calculation for the...

    okay. Figured there was a calculation for the balance point, but it sounds like it's fairly experimental.

    I'll have to wait until next winter to actually figure it out (it's not getting really...
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    btw, it's a 2.5ton unit. so, by your...

    btw, it's a 2.5ton unit.

    so, by your reasoning, should I lower the lockout on the aux heat then? it's currently 35F, which is the "requirement" by one of the local energy companies.

    Thanks!
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    okay. Good to know. I'll kill the compressor...

    okay. Good to know. I'll kill the compressor lockout.

    Thanks!
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    really?! Yeah, the coldest we have here is...

    really?! Yeah, the coldest we have here is occasionally we get single digits (F). But much below freezing it seems like the HP runs non-stop where I figure running the Aux heat for a few minutes...
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    IAQ Setup inquiry

    Hello!

    I have a HP setup that is just about a year old, and I'm curious about the setup at this point.

    It's a Trane XL15i, with a VS AH, and electric aux heat (15KW). From talking to people on...
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    good call on the insulating the floors of the...

    good call on the insulating the floors of the bedrooms. I think mine are, but I've got mixed results when I've had to drill through the floor (sometimes I get pink, sometimes I don't).

    The...
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    *nods* makes sense. I think I'll just wait until...

    *nods* makes sense. I think I'll just wait until they get to the point of being fully broken (or rather, close to fully broken). Right now they're just noisy and I hate old style counter balance...
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    There is a supply duct exposed, but quite...

    There is a supply duct exposed, but quite insulated (the foil backed ducting insulation). The exterior of the insulation generally is the same temp as the surrounding walls/ceiling of the garage...
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    The doors are insulated to R9.2 I think. And the...

    The doors are insulated to R9.2 I think. And the walls (and ceiling) of the garage are already insulated.
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    well, since there is a shared wall, and the roof...

    well, since there is a shared wall, and the roof of the garage space is the floor of the bedrooms, and bathrooms... god, I can't really say without putting a bunch of effort into this.

    And right...
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    Wow, okay then. Great to know! Sounds exactly...

    Wow, okay then. Great to know! Sounds exactly like my place. Though, I'm assuming your doors probably closed and sealed better than mine.
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    sure. And the ICE starts no matter what 7 seconds...

    sure. And the ICE starts no matter what 7 seconds after you start the car, and runs until the cats are warm... but I'm not sure the difference in temp in the garage is going to make a huge impact on...
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    They tend to stay warmer since they're the...

    They tend to stay warmer since they're the highest part of the house.
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    I drive a prius, so that's not going to be a huge...

    I drive a prius, so that's not going to be a huge gain. =) And really, since heat loss is mostly through the ceiling, and heat isn't being generated in the garage (I have a HP, and the AH is...
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    Thanks! the door between the house and the garage...

    Thanks! the door between the house and the garage is sealed. And most of the rest of the house is sealed. Our two big problems when it comes to insulating are the garage doors, and the aluminum...
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    True... I guess a good question in real terms...

    True... I guess a good question in real terms would be more along the lines of:

    What temperature do people see their attached (preferably split level houses) garages staying at when they have good...
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    Garage Door question

    All,

    This might not be the best forum to ask this, but since I've had good luck here asking about my central air system, and I figured this was related, I thought I might pose the question.

    I...
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    okay, I think I get it. So, I set the schedule to...

    okay, I think I get it. So, I set the schedule to "auto" for all the cycles... and then, if I want the fan running all the time, I just set it to "on" in the manual settings. That will override the...
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    but, if I set the fan to auto, doesn't that make...

    but, if I set the fan to auto, doesn't that make it not run unless the heat/cool is on? I'd prefer to have it run all the time unless I don't want it on. That's part of the whole VS AH, and having it...
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    Honeywell IAQ Fan options

    All,

    I have one for you all.

    I have a Honeywell IAQ t-stat (largely because of this forum), hooked to a Trane XL15i with a VS AH.

    I've been doing some home remodeling, and in the process,...
  42. Thread: Confirming Specs

    by staze
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    The strip should run at partial power when it...

    The strip should run at partial power when it doesn't need full on... 10KW is it's max power, to my knowledge.

    I mainly only expect to need it largely if the HP dies... meaning I'd need all 10KW...
  43. Thread: Confirming Specs

    by staze
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    There is a $400 rebate on the system... which I...

    There is a $400 rebate on the system... which I really should mail in tonight. =P

    7.5KW would provide 23565btus (7500W x 3.142btu/w)... the heatload on my house is about 27000... so 10KW is...
  44. Thread: Confirming Specs

    by staze
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    Cost cost cost. Electric ceiling heat is just...

    Cost cost cost. Electric ceiling heat is just really friggin' costly. Like I said, keeping the house at 62 ran me $80/month in electric (and that's with my area having about the cheapest electricity...
  45. Thread: Confirming Specs

    by staze
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    So as a final comment, system works great....

    So as a final comment, system works great. Haven't tried the AC yet obviously, but at this point, I was averaging 54kwh/day last month (ceiling heat), and this month since the new system was...
  46. Thread: Confirming Specs

    by staze
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    excellent! yeah, I notice it's cycling less, and...

    excellent! yeah, I notice it's cycling less, and getting better about figuring out recovery times.

    Now if I can only teach myself how to read the electrical meter right... I swear between...
  47. Thread: Confirming Specs

    by staze
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    3,913

    Well, install is done. They finished a day ahead...

    Well, install is done. They finished a day ahead of schedule. System so far works great... amazing how nice it is to have central air (and therefore central air filtration). The outdoor unit is a bit...
  48. Thread: Confirming Specs

    by staze
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    Okay, changed the tstat to the Trane XL900....

    Okay, changed the tstat to the Trane XL900. According to everything I've seen online, this is the exact same thing as the Honeywell IAQ, just branded "Trane".

    So, cool. Install starts tomorrow......
  49. Thread: Confirming Specs

    by staze
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    I kind of follow. I mean, I guess the question...

    I kind of follow. I mean, I guess the question would be if it's worth the extra money to get the 900 series, which is based off the IAQ in my house, in the Pacific NW (I've noticed most people on...
  50. Thread: Confirming Specs

    by staze
    Replies
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    From what I know of the Trane, it locks out the...

    From what I know of the Trane, it locks out the strip heater at 40F. The 900 series, or the IAQ, sounds like it can do lower than that.

    I know the installer talked about the VS blower running at...
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