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Type: Posts; User: kcb203

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  1. Replies
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    Thanks--I was assuming that it would be...

    Thanks--I was assuming that it would be proportional--0 subcooling is totally empty, so 20/15 would be overcharged by 33.3%. Glad to see I'm wrong.
  2. This is the Ask Our Pro's forum, and only Pro...

    This is the Ask Our Pro's forum, and only Pro members that have been vetted by the AOPC may post advise, commentary, or ask questions of the OP here.

    You can find the rules for posting and...
  3. Replies
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    527

    Consequences of overcharging?

    I just had a tech out for a routine service on a 4 ton Carrier Infinity heat pump. Nobody has looked at the unit for a couple years, and it has been running fine. He noted that the system had been...
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    367

    Vacation house heat pump in Virginia

    I'm about to build a vacation home on a lake in Virginia. (Design conditions 17 F winter, 92 summer.) We'll use it most summer weekends, some spring and fall weekends, and probably once a month in...
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    581

    Here's the spreadsheet I use. The furnace...

    Here's the spreadsheet I use. The furnace calculations work for anyone, but the heat pump calculations are specific to my coil/outdoor unit combo.
    ...
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    581

    Dual-fuel break even point

    I built a new house 5 years ago with two dual-fuel systems with a 95% efficient furnace for the lower level and an 80% for the upper level. The heat pumps are both 19 SEER. At the time, I made a...
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    1,358

    The central area of the attic is finished. The...

    The central area of the attic is finished. The finished area is surrounded by fiberglass batts on the sides and top, and the floor between the unfinished part and the second story is blown...
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    1,358

    The system wasn't used during construction--we...

    The system wasn't used during construction--we waited forever to get the electrical installed. I don't think it was turned on until about two weeks before we moved in--long after the drywall dust...
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    1,358

    I saw that registration is currently required to...

    I saw that registration is currently required to get the 10 year warranty, but the paperwork I have says nothing about that. It says 5 years for most coils, and 10 years for the tin plated models,...
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    1,358

    0408X35219 Maybe I should also point out that...

    0408X35219

    Maybe I should also point out that this unit is in unconditioned space in the attic. The unit for the 1st level/basement is in the conditioned basement.
  11. Replies
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    1,358

    Carrier Infinity coil failure after five years

    I have a house in Virginia with two Carrier Infinity units, one for the basement/1st floor, and another for the 2nd floor/finished attic.

    The upper unit stopped cooling last week. It had been off...
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    676

    The ERV is "installed." It comes up on the list...

    The ERV is "installed." It comes up on the list of installed equipment. It comes on in Checkout mode in the service menu. But it never comes on otherwise, and there are no menu options to tell it...
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    676

    Carrier Infinity Control of ERV

    I just had a new house built, and am quite thankful for all the great advice I've obtained here over the years--both by lurking, and by a handful of questions. The builder's HVAC sub has installed...
  14. Replies
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    4,078

    Flush-mount wood registers in hardwood floor

    What does everyone think of installing a flush wood register that is installed at the time a hardwood floor is installed? Is the airflow adequate? I'm about to build a house and am considering...
  15. Replies
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    1,395

    Arrrggh

    Now I'm getting more and more frustrated. I did a Manual J with HVAC-Calc and double and triple checked. The heat pump models I'd like to install will satisfy my Manual J, and I even changed the...
  16. Replies
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    1,395

    A couple points: I'd never consider installing...

    A couple points: I'd never consider installing such an oversized furnace it it was not just the backup for the heat pump, but if it's only coming on when the temperature is ~30 degrees, the low...
  17. Replies
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    1,395

    The HVAC contractor has done a Manual J using the...

    The HVAC contractor has done a Manual J using the 8th edition and comes back with higher numbers than I've got and won't do a 3 ton, and say that the local permit authority wouldn't allow a 3 ton. ...
  18. Replies
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    1,395

    Carrier Infinity heat pump/furnace sizing

    Iím building a new house in Northern Virginia and am right below the dividing line between a 3 and 4 ton heat pump for the second floor/attic in a two-unit system. I would be comfortable going...
  19. Replies
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    Thanks for all of the helpful comments. On other...

    Thanks for all of the helpful comments. On other issues, the builder's credit has been quite reasonable (I'm as much a stickler for windows and kitchen cabinets as I am for HVAC).
  20. Replies
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    3,560

    I thought the Infinity didn't use bypass dampers....

    I thought the Infinity didn't use bypass dampers. Do you mean the humidifier ducting?
  21. Replies
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    3,560

    Guidance on specs for Carrier Infinity bidding

    I'm building a new house and am not happy with the default system that the builder installs, nor with his contractor's pricing and expertise with Carrier Infinity systems. Accordingly, we're putting...
  22. Replies
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    957

    ERV or HRV in Northern Virginia

    I relied on advice from this forum several years ago when replacing my furnace/AC in a 60-year-old house with a Carrier Infinity system.

    I'm about to build a new home in Northern Virginia. I've...
  23. Replies
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    717

    As I talked about in my previous post, I'm having...

    As I talked about in my previous post, I'm having my house zoned into three zones with my one-year old Carrier Infinity system. Due to the layout of the ducts (an old house was added on to), I'll...
  24. Replies
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    914

    There are two trunk lines. There are also two...

    There are two trunk lines. There are also two small branch lines that extend directly from the supply plenum (is that the correct word?) just above the A/C coil.

    The first trunk line serves the...
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    I live in a two-story colonial in Virginia built...

    I live in a two-story colonial in Virginia built in 1947 that has a two-story addition on the back that was added in 1984. Last year, I had a Carrier Infinity system installed (3 ton A/C, 60k btu...
  26. Replies
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    I fiddled with the switches on the furnace and...

    I fiddled with the switches on the furnace and the airflow is now a full 1200 cfm. Perhaps the Infinity doesn't totally override the furnace settings.

    Hopefully this will stop the sweating. I...
  27. Replies
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    I had a Carrier Infinity system installed a...

    I had a Carrier Infinity system installed a couple months ago (58MVP060-14 and 38TDB037), and ever since, I've had duct sweating problems that I never had before. I posted on this before, but now...
  28. Replies
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    I think insulating ducts and following teddy...

    I think insulating ducts and following teddy bear's suggestions are my only way to control this. Increasing the supply as hyper_racing suggested won't work--the dewpoint of the basement air is 49,...
  29. Replies
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    I've thought about a dehumidifier, but I thought...

    I've thought about a dehumidifier, but I thought that the Infinity should take care of it. The humidity in the rest of the house is much less than previous summers with the old unit. Perhaps my old...
  30. Replies
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    5,139

    I had a new Carrier Infinity system installed...

    I had a new Carrier Infinity system installed last week in Northern Virginia. So far everything is running splendidly except for one problem--the supply duct in the finished basement just past the...
  31. Thank you Irascible. I'll think of you fondly...

    Thank you Irascible. I'll think of you fondly when I sit in my 75 degree air with 50% humidity.

    There is a drip leg on the gas--it's to the left side of the PVC pipes.

    I think there is a well...
  32. Thanks for the comments. I have fixed or will...

    Thanks for the comments. I have fixed or will fix the minor things (loose cable clamps, etc.).

    It's interesting how the major things were done well but they took a few shortcuts on the little...
  33. I'm surprised this hasn't sparked any comments. ...

    I'm surprised this hasn't sparked any comments. If my post was too long to read, my main concern is whether the TXV will function properly when mounted horizontally. The other stuff I can take care...
  34. My new Carrier Infinity system was installed last...

    My new Carrier Infinity system was installed last week at my home in Northern Virginia. I have mixed feelings about the job that the installers did. They did very neat work and the job looks...
  35. Replies
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    So far so good. They've done a very tidy job...

    So far so good. They've done a very tidy job running lines, PVC, and cables.

    I've read all the installation instructions myself, and my only concern is that the outdoor unit (38TDB037) is...
  36. Replies
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    I guess my post wasn't clear, but I am getting a...

    I guess my post wasn't clear, but I am getting a two stage. But if I got the 80k, the second stage is 49K BTU output, so the second stage is approximately what the total capacity needs to be.
    ...
  37. Replies
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    1,379

    Company #2 came through for me. We had a long...

    Company #2 came through for me. We had a long discussion about sizing, and rather than redo my Manual J, he reviewed my numbers and methodology. (I can use a tapemeasure as well as anyone.) He...
  38. Replies
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    1,612

    Iím right at the border of choosing a 60k vs. 80k...

    Iím right at the border of choosing a 60k vs. 80k input furnace and need some advice. Iíve already asked a few questions here and appreciate the very helpful input.

    I have a 58-year-old house in...
  39. Replies
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    1,379

    Two of them said the chimney would have to be...

    Two of them said the chimney would have to be relined without looking at the size. The one who said it wasn't necessary says his company never relines them and he hasn't had a problem yet--he didn't...
  40. Replies
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    1,379

    The magazine is usually very good. The ratings...

    The magazine is usually very good. The ratings are based on subscriber surveys, and the magazine accepts no advertising. So the ratings aren't based on membership or dues or anything within the...
  41. Replies
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    1,379

    I'm at my wit's end. I'm a homeowner who has...

    I'm at my wit's end. I'm a homeowner who has spent hours on this site reading posts and learning about HVAC. I'm replacing my gas furnace and A/C in Northern Virginia. A local magazine, Washington...
  42. Replies
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    618

    The supplies are as follows: Old Part of House...

    The supplies are as follows:

    Old Part of House (all on one branch of main duct):

    1 Basement

    First Floor
    2 Living Room
    1 Dining Room*
    1 Kitchen
  43. Replies
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    618

    I've had a couple installers out to look at my...

    I've had a couple installers out to look at my house, and both thought that zoning wasn't practical. I'd like to see whether it's worth the effort to seek other opinions.

    I have a two-story plus...
  44. Replies
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    11,967

    Thanks for the info. I found the formula on...

    Thanks for the info. I found the formula on Carrier's website but was surprised the unit could be that old. An addition was added to my house in 1984, taking it from 1800 square feet (including...
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    Should I do this now or wait for it to quit on a...

    Should I do this now or wait for it to quit on a cold January night or a hot August afternoon? Can I try to get a few more years out of it?

    I figure that since I've done my research now, I'll be...
  46. Replies
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    I have a 58 year old house in Arlington, Va.,...

    I have a 58 year old house in Arlington, Va., with a 32 year old Carrier gas furnace and a 20 year old Carrier air conditioner.

    Both units have worked fine in the five years I've owned the house...
  47. Replies
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    11,967

    What year was this Carrier furnace built? ...

    What year was this Carrier furnace built?

    Model: 58GC100
    Serial: K256293

    Based on Carrier's website I think it means 1972, but I don't think it could be that old, could it?
Results 1 to 47 of 47
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