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Type: Posts; User: Shophound

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  1. Replies
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    Views
    594

    I doubt your system is undersized. Stay focused...

    I doubt your system is undersized. Stay focused on improving the building thermal boundaries. You might also consider at some point the various benefits of "cool roof" materials to take a big chunk...
  2. Yep. You want to get as close as you can to what...

    Yep. You want to get as close as you can to what the actual entering air state is to the evaporator. Measuring at return air intakes can render readings different than right at the evaporator intake...
  3. Thread: XL20i noise

    by Shophound
    Replies
    33
    Views
    1,019

    If and when the overall air circulation rate of...

    If and when the overall air circulation rate of this system is improved, the refrigerant charge and system performance should be rechecked to verify it is performing well for the actual operating...
  4. Thread: XL20i noise

    by Shophound
    Replies
    33
    Views
    1,019

    Apart from the thermostat and alarm concerns, I'd...

    Apart from the thermostat and alarm concerns, I'd really want to take a good, hard look at the duct design and layout. You can have the fanciest, highest SEER system in the world, replete with bells...
  5. I'd be curious about the multi-position switch....

    I'd be curious about the multi-position switch. That is all.
  6. Sounds like the element thermostat has a twenty...

    Sounds like the element thermostat has a twenty degree deadband (range between when element turns on and turns off).

    I would not trust your meat thermometer readings entirely. A thermocouple clamp...
  7. I say find a contractor who not only understands...

    I say find a contractor who not only understands the value a TXV adds to a system, but also understands why a filter-drier should be installed any time the system is open for work, as Baldloonie has...
  8. Replies
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    Best not to evacuate through a gauge manifold. ...

    Best not to evacuate through a gauge manifold.

    Are your 1/2" hoses actual vacuum (low permeability) hoses or charging hoses sized at 1/2"?

    What type of micron gauge are you using? Does the...
  9. What I would want to know is the temperature of...

    What I would want to know is the temperature of the compressor discharge gas going into the desuperheater. A good tech with a type k thermocouple pipe clamp thermometer could do this, and interpret...
  10. Ditto on the nitro still being in the system....

    Ditto on the nitro still being in the system. With the mild weather OP has experienced, the unit should have delivered SOME amount of comfort, even if is mismatched.
  11. Replies
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    6" flex duct, installed and sealed correctly,...

    6" flex duct, installed and sealed correctly, will probably flow more air, but at a reduced velocity, over that of a properly installed and sealed 5" flex duct run equivalent. It might affect supply...
  12. One more thing: is there a mixing valve in the...

    One more thing: is there a mixing valve in the water piping to and/or from the water heater?
  13. How is the cooling performance of your heat pump?...

    How is the cooling performance of your heat pump?

    If the desuperheater circuit was stealing heat from your tank, I think two things would be going on:

    a) heater elements would run continuously...
  14. + 1, X2, etc. What we have here is a prime...

    + 1, X2, etc. What we have here is a prime example why multi-family housing needs and hollow building construction can be problematic. Add to that unsealed HVAC ducting, or worse yet, building...
  15. The "check valve" is more properly called a...

    The "check valve" is more properly called a backdraft damper for the exhaust fan.

    The bath fan may be pulling smoke into the bathroom from the plumbing penetrations below the sink. You mention a...
  16. If the return duct passes through the apartment...

    If the return duct passes through the apartment below you to reach the furnace in the basement, or if it uses a building cavity anywhere along the return path to reach the furnace, it can draw in...
  17. If the two furnaces on the left are induced draft...

    If the two furnaces on the left are induced draft and the two on the right are natural draft...ruh roh...
  18. Replies
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    888

    It means that, at worst case, both of those...

    It means that, at worst case, both of those elbows are acting like 60 feet of straight duct in terms of resistance per foot of length, in addition to any straight duct length your system already has....
  19. Yes, but very briefly. Breaker can trip if LRA...

    Yes, but very briefly. Breaker can trip if LRA time at startup is prolonged.
  20. Sealing the ductwork can never hurt anything...

    Sealing the ductwork can never hurt anything unless it is so leaky that upon sealing it the static pressure in the system becomes too high for the blower in the air handler or furnace.

    In your...
  21. Replies
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    362

    Is the basement open to the other floors...that...

    Is the basement open to the other floors...that is, there is either no door between the basement and the first floor, or if there is a door (or more than one) it stays open all of the time?
  22. Okay, let's run with this potential vs. my...

    Okay, let's run with this potential vs. my earlier suggestion. Now, if you find the piston has trash in it, the first thing that should run through your mind is "Where did that trash come from?" If...
  23. There are 220 volt two pole breakers that are...

    There are 220 volt two pole breakers that are GFCI.

    Is there a permit pulled on this installation? If so electrical inspector may require GFCI double pole for 220 volt in addition to Daikin...
  24. Replies
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    2,164

    If you move the outlet next to where the cable...

    If you move the outlet next to where the cable and speaker connections are, you then have a free wall behind that chair to install an additional return air gril.
  25. To Wes: I think you need to SLOW DOWN. This...

    To Wes:

    I think you need to SLOW DOWN. This type of situation is never resolved satisfactorily by taking wild swings and hoping for the best.

    Think about this: what would cause you to have...
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