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  1. Ask him if they never get changed. Why do HVAC...

    Ask him if they never get changed. Why do HVAC supply houses sell them.

    Your filter drier may or may not need changed out. It is good to change it out anytime the system is opened to the...
  2. Sorry, we're not a DIY site. Thread closed.

    Sorry, we're not a DIY site.

    Thread closed.
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    Sorry, we're not a DIY site. Thread closed.

    Sorry, we're not a DIY site.

    Thread closed.
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    1 amp at 120 volts=120 VA. 5 amp at 24 volts=120...

    1 amp at 120 volts=120 VA.
    5 amp at 24 volts=120 VA.

    Low voltage fuse is too large.
  5. Just call and talk to him calmly. Remember,...

    Just call and talk to him calmly.

    Remember, one of the first things he'll say is. So you don't check your air filters every 30 days.
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    Back when R410A first came out. Manufacturers...

    Back when R410A first came out. Manufacturers were requiring techs to take a course on it. And would give you a cert you took that course. I think I took 3 of them. No idea where there certs are now...
  7. Sorry, we're not a DIY site. Thread closed.

    Sorry, we're not a DIY site.

    Thread closed.
  8. Sorry, we're not a DIY site. Thread closed.

    Sorry, we're not a DIY site.

    Thread closed.
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    And get thrown out by the landlord.

    And get thrown out by the landlord.
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    Do you mean an ECM, or a VS ECM.

    Do you mean an ECM, or a VS ECM.
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    A spammer revived this thread. The spam is gone,...

    A spammer revived this thread. The spam is gone, so you don't see it.
  12. Just don't set back your temp at night. If it...

    Just don't set back your temp at night.

    If it goes near full modulation, it will do it again, and thats not good for the heat exchanger.
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    Taken from ASHRAE. At AHRI design conditions. And...

    Taken from ASHRAE. At AHRI design conditions. And also from manufacturers test with some of the load calc programs also having Manual S included.
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    24,000 BTUs/800CFM=30/1.08=27.77F delta.

    24,000 BTUs/800CFM=30/1.08=27.77F delta.
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    No, they are based on achieving a SHR, not a temp...

    No, they are based on achieving a SHR, not a temp delta, and on nominal tonnage.

    2 ton/24,000 BTUs/(1.08x20)=1,111 CFM, and no latent capacity.

    2 ton/24,000x.8=19,200. 19,200/(1.08x20)=888 CFM...
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    Looking at the old thermostat wiring, tells you...

    Looking at the old thermostat wiring, tells you what was controlled by the thermostat, so you would know how to wire, and set up the new thermostat.

    Lots of old equipment no longer have legible...
  17. 125,000 BTU input 80% furnace is 100,000 BTU...

    125,000 BTU input 80% furnace is 100,000 BTU output.

    120,000 BTU input 97% furnace is 116,400 BTU output.

    So basically, he increased your heat output by 16.4%

    Are you using temp set back at...
  18. And there would be a thousand lawyers that would...

    And there would be a thousand lawyers that would say someone could still sue for liability.

    Sorry, we're not a DIY forum.

    Thread closed.
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    And there have been plenty that claimed to be...

    And there have been plenty that claimed to be techs, and posted in the tech forums. Only to be found out they were lying, and were just home owners trying to get DIY help.

    If he is a tech, then he...
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    He's in the right forum. He is a home owner, not...

    He's in the right forum. He is a home owner, not a tech.
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    Doesn't look like the old thermostat is a heat...

    Doesn't look like the old thermostat is a heat pump thermostat.
  22. Would have been nice. But if the OP's area has...

    Would have been nice.

    But if the OP's area has a low of 40F for the coldest nights, zoning isn't really needed. And the installers would have blotched that too.
  23. Don't know if its leaky, but at 5200 sq ft its a...

    Don't know if its leaky, but at 5200 sq ft its a fairly large home.
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    40,000 Might take a bit longer to recover from...

    40,000

    Might take a bit longer to recover from night set back. But the increased comfort the rest of the time, makes it the better choice.
  25. With spray foam, I find it hard to believe that...

    With spray foam, I find it hard to believe that you would need anywhere near 5 tons.
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    Resi central A/C shouldn't be set below 68. While...

    Resi central A/C shouldn't be set below 68. While many are, its at the risk of damaging the A/C.
  27. Would you happen to remember what size the old...

    Would you happen to remember what size the old 80% furnace was.

    At the info you posted, I believe its exceeding its allowable temp rise.

    Your 2-10" return ducts are too small, and a duculator...
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    If the owner isn't willing to pay for make up....

    If the owner isn't willing to pay for make up. Why would he pay for a new boiler, he doesn't think he needs.
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    Based on SHR needed for the load. HVAC Calc...

    Based on SHR needed for the load.

    HVAC Calc used 80% SHR to get CFM.
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    Your suppose to pick equipment that can meet the...

    Your suppose to pick equipment that can meet the load calc specs. Done by using the extended data sheets of the equipment.
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    You don't add the resistance of all of the supply...

    You don't add the resistance of all of the supply registers. Only 1 is considered.
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    Sounds like they may have removed some of the...

    Sounds like they may have removed some of the charge to raise the coil temp.
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    Probably only needed a total of 10lb. 8oz.

    Probably only needed a total of 10lb. 8oz.
  34. Sorry, we're not a DIY site. Thread closed.

    Sorry, we're not a DIY site.

    Thread closed.
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    I would take a temp and humidity reading right at...

    I would take a temp and humidity reading right at the dehumidifiers the basement is a bit cool and the heat is not running.

    The cooler the air is down there, the higher the RH will be. Because...
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    Guessing your reading the RH in the first...

    Guessing your reading the RH in the first floor/living area. So what is the RH and temp of the basement?

    Is the air handler running, that the dehumidifier has to work against the blower.
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    I would expect around a pound an hour perhaps a...

    I would expect around a pound an hour perhaps a bit more if its actually moving 391 CFM.

    So how is it ducted?
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    Okay, how is it ducted? In the summer, you had...

    Okay, how is it ducted?

    In the summer, you had the A/C to help it.

    At 80 60% RH, there is 92.5 grains of moisture per pound of air. With a dew point of 64.9F.
    At 68F 52% RH, there is only...
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    Only takes one to pump out an excessive amount of...

    Only takes one to pump out an excessive amount of oil.

    The OP can check the sump pressure and compare it to the suction pressure. If they are the same, at least oil ring is broke.
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    The 155 pints a day rating, is at a temp of 80F...

    The 155 pints a day rating, is at a temp of 80F and 60% RH.

    However, it should still do better than what you measured. Removing the P trap will allow water to be held up in the dehumidifier, so...
  41. https://static.grainger.com/rp/s/is/image/Grainger...

    https://static.grainger.com/rp/s/is/image/Grainger/6AWP2_AS01?$lgthumb$

    Anti vibration.
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    If its a recip, a cracked oil ring will cause it.

    If its a recip, a cracked oil ring will cause it.
  43. Sorry, we're not a DIY site. Thread closed.

    Sorry, we're not a DIY site.

    Thread closed.
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    Not worth trying to guess if its charged okay or...

    Not worth trying to guess if its charged okay or not.

    Its kind of like checking the MPG your car gets. By driving it to the top of a long hill. And then seeing how much gas it used doing 60 MPH...
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    With a modulating heat pump. Best to have a...

    With a modulating heat pump. Best to have a variable speed air handler.
  46. Digital thermostats round the displayed temp. So...

    Digital thermostats round the displayed temp. So when it shows 72, it could be higher, or lower, could be 72.4. Same as when it shows the temp dropped, it could be 70.4

    Next, what other...
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    Only Pro members have PM ability, so he can't PM...

    Only Pro members have PM ability, so he can't PM you.
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    Hmm, pipes burst, compared to people dying. Have...

    Hmm, pipes burst, compared to people dying. Have to think about that.
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    Your honor. I opened a window so it wouldn't back...

    Your honor. I opened a window so it wouldn't back draft CO into the building. How was I suppose to know someone would close it the first time it rained into the building through that window.
  50. Sorry, we're not a DIY site. Thread closed.

    Sorry, we're not a DIY site.

    Thread closed.
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