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  1. What do you mean by cabinet pressure? The media...

    What do you mean by cabinet pressure? The media filter is not part of the cabinet and the TESP is taken between the filter and air handler. Total external static pressure means external of the air...
  2. Sounds like a power imbalance. I would be...

    Sounds like a power imbalance. I would be checking each leg to ground.
    I wonder if they're using 2 legs of 3 phase to power the 230v air handler.
    Wonder if the low voltage was converted to...
  3. The furnace will actually help to lower the RH%...

    The furnace will actually help to lower the RH% because of air expansion with an increase in temperature. You have moisture coming in from elsewhere. Keeping the windows open with a lower outdoor...
  4. The humidity in the house is 40% higher? So,...

    The humidity in the house is 40% higher? So, you're saying it's around 73% RH with the furnace running? That information doesn't sound accurate.
    Are you discharging your flue gases directly into...
  5. Wow! I would assume that a gas company would...

    Wow! I would assume that a gas company would check gas service pressure first, and ensure that's correct without any major fluctuation with other appliances operating.
  6. Sounds to me like you’ve had several repairs...

    Sounds to me like you’ve had several repairs adding up to payback or exceed the amount you put in to the warranty.

    Time to cut your losses and use professional contractors, not fly-by-night home...
  7. The on delay is designed to pre heat/cool the...

    The on delay is designed to pre heat/cool the coil. The off delay is designed to soak up the last bit of heating/cooling effect you can get from the coil once the outdoor unit shuts down. Heating...
  8. Thread: Delta T help

    by mgenius33
    Replies
    15
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    422

    Please provide both model numbers of the...

    Please provide both model numbers of the equipment, TAM7 air handler and the accessory heating coil. The maximum allowable inlet water temperature is 180°. So, you should be able to raise that...
  9. This requirement is set for cooling mode, as...

    This requirement is set for cooling mode, as cooling mode is the only approved mode for setting/ validating refrigerant charge.

    I would suggest keeping the heat pump heating blower speed the same,...
  10. Per Trane XV20i Service Manual page 7: ...

    Per Trane XV20i Service Manual page 7:

    "Important: VARIABLE SPEED OUTDOOR UNITS REQUIRE THAT THE BLOWER BE CONFIGURED FOR 400CFM/TON"
  11. Thread: Delta T help

    by mgenius33
    Replies
    15
    Views
    422

    Turn your boiler or water heater down slightly,...

    Turn your boiler or water heater down slightly, or raise the air speed.
    Make sure your air filters are clean.
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    My Makita sub compact 18v impact has loads of...

    My Makita sub compact 18v impact has loads of torque and also has a screw assist mode that starts slow and speeds up once it senses resistance. Designed to help prevent cross threading.
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    If there’s no need for dehumidification I agree...

    If there’s no need for dehumidification I agree with the single stage. AC.
    The best advertisement is word of mouth for us contractors. Most of us know the value in that, so I think they’ll likely...
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    Get a second opinion. Pricing is not allowed on...

    Get a second opinion. Pricing is not allowed on this site, but it can vary greatly between contractors. The part itself is not all too terribly expensive. It takes about 15 minutes to install a...
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    Staging equipment is not intended for energy...

    Staging equipment is not intended for energy savings.
  16. Replies
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    551

    Alternatively, you could add a whole house...

    Alternatively, you could add a whole house dehumidifier if your home has trouble maintaining 50% RH. I can tell you from personal experience, the staging equipment works if it's installed and set up...
  17. Constant CFM (cubic feet of air per minute) means...

    Constant CFM (cubic feet of air per minute) means the blower will attempt to deliver the proper amount of airflow according to the demand, and will modulate as a variable speed. It will increase...
  18. It's possible with LP, but I doubt it's the heat...

    It's possible with LP, but I doubt it's the heat exchanger.

    I would be looking at flue gas recirculation, due to faulty concentric flue, or something with the intake?

    Have you had the roof...
  19. Replies
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    Good choice with the XC95m, I have that unit for...

    Good choice with the XC95m, I have that unit for the 1st floor system. I would have chosen a 2 stage or variable speed outdoor unit though.

    What was the Lennox dealer thinking? Why would you...
  20. The XV20i heat pump can modulate from 25%-100%...

    The XV20i heat pump can modulate from 25%-100% capacity in 1/10th % increments allowing for a true 750 stage variable capacity. Yes, that means it can go as low as 1.25 tons. The straight cooling...
  21. Worst case scenario, heat exchanger needs to be...

    Worst case scenario, heat exchanger needs to be replaced under mfg. part warranty. Like the others have said, a far cry from the unit being replaced.

    BTW you can check your warranty on the...
  22. I find it hard to believe an 1800 sqft home with...

    I find it hard to believe an 1800 sqft home with R41 attic and sealed ducting requires 5 tons. I must have missed your location, it’s not by chance on the equator is it?

    Just shooting from the...
  23. I could be mistaken, but I’m not aware of any...

    I could be mistaken, but I’m not aware of any spray foam that is “approved” for use inside ducting. Flame spread index would likely be an issue. I’ve heard of spray foam on the outside of sheet...
  24. Are you kidding me? They want to replace your...

    Are you kidding me? They want to replace your XV95 because they can’t fix it?
    They likely installed a generic replacement igniter, not the oem. Trane/ AmStd. uses a logic control that reduces...
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    Sounds like the compressor had several high temp...

    Sounds like the compressor had several high temp cut outs, and is going into a soft and hard lockouts. You resetting the unit is just making the equipment function with a critical issue. This could...
  26. Doubtful... Turning up the gp a couple 10ths...

    Doubtful...

    Turning up the gp a couple 10ths of an inch didn’t create all of these issues.

    Did older “RGGED” furnaces work for years? Absolutely yes, but it’s very highly unlikely that a...
  27. Well, all that aside, and answering one of the...

    Well, all that aside, and answering one of the OP's questions, did the gp adjustment from 3.2" to 3.5" cause overheating and a burning smell? I highly doubt it. Having worked on many older ribbon...
  28. With a low gp setting because it was over...

    With a low gp setting because it was over heating? So, you’re saying CO is not an issue with this configuration?

    In any case, there’s absolutely no reason a tech should place the company or...
  29. So, what’s the proper solution? Exactly what...

    So, what’s the proper solution?

    Exactly what the tech suggested, replacement.

    CO poisonings from improperly adjusted furnaces were much more common as well, back in the day.
    Today’s modern...
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    Leaving the fan on in AC mode is great if you...

    Leaving the fan on in AC mode is great if you like high humidity in summertime.

    I agree with the others. 1st choice second system, 2nd choice properly designed zoning with modulating equipment.
  31. As a moderator I’m surprised at this comment on...

    As a moderator I’m surprised at this comment on an AOP forum. This supplies the homeowner with justification that it’s okay. Do I agree with you, yes it was done ages ago, but a proper combustion...
  32. Again, the furnace is RIGGED, it’s not a question...

    Again, the furnace is RIGGED, it’s not a question whether it was “adjusted to fit the sq footage”, it’s rigged. This means the manufacturer did not design the unit to function in this capacity. It...
  33. Yes, they may have overlooked that switch, have...

    Yes, they may have overlooked that switch, have them come back. It’s their responsibility to make sure the settings are correct for the application.
  34. Sounds to me like the original installer rigged...

    Sounds to me like the original installer rigged the unit to run. This poor new guy just tried to adjust it to MANUFACTURER SPECS, and now you’re making him pay the price for doing his job?
    ...
  35. Really? A blower wheel cleaning that could...

    Really? A blower wheel cleaning that could potentially add 30-45 mins to a call is free? Some wheel cleanings can take over an hour or more.
  36. Again please reference post #2. Nothing is...

    Again please reference post #2.

    Nothing is FREE!

    Free maintenance spells, I NEED to sell you something in order to make money!!!
    When is the last time you told your boss you would like to...
  37. Replies
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    The inter-stage delay is adjustable by the...

    The inter-stage delay is adjustable by the technician from 0 sec. to 15 mins in 5 min increments. They need to wire it properly and adjust the control panel in order for it to function as desired. ...
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    Poll: Daikin is Goodman, Trane/Am Std. I may be a...

    Daikin is Goodman, Trane/Am Std.

    I may be a bit biased, but I’ve had nothing but trouble with Goodman warranty. The part itself may be free exchange, but all of the supply houses in my area...
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    Another note, you’re likely not going to reach...

    Another note, you’re likely not going to reach 50%RH in mid-winter with a bypass style humidifier, but houses cannot typically handle high humidity in the winter. High moisture in the winter can...
  40. Lol, Goodman warranty, isn’t that what you call...

    Lol, Goodman warranty, isn’t that what you call an oxymoron?

    Don’t worry when it fails next season, they’ll give you a new unit under their “lifetime compressor warranty”, lol haha haha....
  41. I don't know how other techs do it, but I pull...

    I don't know how other techs do it, but I pull out the electronic leak detector first.

    If it's not showing up quickly, then I step up the pressure with nitrogen, and search again.

    Once I...
  42. Same thing I've noticed with most electronic...

    Same thing I've noticed with most electronic stats.
  43. Why would you want to energize electric heat when...

    Why would you want to energize electric heat when you don't need it? This request doesn't make much sense. You've reached the balance point of your system. You can set the aux heat Delta staging...
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    What did it do when the tech bypassed the start...

    What did it do when the tech bypassed the start cap? Did it run for a few seconds, or not at all?
  45. Replies
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    It’s hard to say without personally testing it....

    It’s hard to say without personally testing it.
    May be a bad compressor, or maybe the capacitor is wired backwards to the compressor.
    There are no high voltage limit controls to the compressor with...
  46. It does heat slightly. Compressor heat goes back...

    It does heat slightly. Compressor heat goes back into the supply air outlet.
  47. Replies
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    The app does not have the ability to show the...

    The app does not have the ability to show the modulated or speed % reading. So, it's simply stating it had to rev up in order to maintain temperature. Ironically, the app is based on the analog...
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    Technically systems are more efficient when they...

    Technically systems are more efficient when they have a greater temperature difference.
    I.E. If the house is colder in heating mode, the equipment is more efficient, if the house is warmer in...
  49. If I had this issue with a customer, I would be...

    If I had this issue with a customer, I would be getting the manufacturer involved. What has your hvac contractor suggested?

    It's funny how quickly we want to condemn the environment. The fact...
  50. Good luck trying to get a legit, quality...

    Good luck trying to get a legit, quality contractor willing to work for labor. Again, you may be shopping the Craigslist ads for your contractor.
    We legit contractors are in business to make money...
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