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  1. minerals have to go somewhere. Where does it go?

    minerals have to go somewhere. Where does it go?
  2. Colder evap, my guess.

    Colder evap, my guess.
  3. Previous versions of this idea don't work in dry...

    Previous versions of this idea don't work in dry climates.

    I've had alot of experience in water tower cooling and the problem with scale build-up. I cannot understand how minerals are removed...
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    386

    Take both valve stems out, evacuate, then charge...

    Take both valve stems out, evacuate, then charge to a positive two or three lbs. remove hose and instyall stem. Lot simpler
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    488

    I provide customers ROI calculations between...

    I provide customers ROI calculations between different SEER ratings. One thing it dosn't take into concideration is maintenance or costly OEM parts that are found in high high SEER rated equipment.
  6. Electric heat requires alot of electricity. Be...

    Electric heat requires alot of electricity. Be sure that small house has a large electric panel. I'm sure you will be paying an electrician too.
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    I'm only worried about the residual oil that may...

    I'm only worried about the residual oil that may be left, no matter how we try to flush it out.
  8. Replies
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    662

    I'm concerned with the existing mineral oil.

    I'm concerned with the existing mineral oil.
  9. Replies
    14
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    662

    R22 to R410a evap retrofit

    When an evap changeout is not economically possible, how successful are changing R22 evap to R410a if we replace CU.

    This is assuming evap is rated for the pressure and that the TXV and...
  10. Replies
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    1,153

    Even though voltage is high, it is exactly like...

    Even though voltage is high, it is exactly like how 120 volts' neutral is derived on a 208 volt three phase service. Except the service is derived from 460 volt, three phase. 277 volt is never...
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    1,710

    It's unknown if they are properly bonded together...

    It's unknown if they are properly bonded together but if he was getting shocked it's a good chance they are not bonded. Just guesses at this point.

    No amount of ground rods and bonding copper...
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    1,174

    "Which might work but only adds complication...

    "Which might work but only adds complication which could be eliminated by powering the defrost timer motor in parallel with the compressor." this would have clock stop when compressor is powered down...
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    1,174

    My idea was to initiate the clock on a low temp...

    My idea was to initiate the clock on a low temp stat. Like a heatpump do.
  14. Any heat will help, though.

    Any heat will help, though.
  15. Replies
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    1,174

    Power the clock motor through a defrost stat,...

    Power the clock motor through a defrost stat, close on fall.
  16. canyt figure the subcooling figure will do you...

    canyt figure the subcooling figure will do you any good on a captube system.
  17. Is this an evaporative cooling tower? Can you...

    Is this an evaporative cooling tower? Can you bypass the tower? Pump energy would add heat while no heat loss to outside. But be carefull to circulate enough tower water to keep from freezing...
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    when I have a real tough RTU to squeeze on a...

    when I have a real tough RTU to squeeze on a roof, I will build models to check clearances. Further, I can give this to the installer so they know exactly how it shoiuld look.
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    Do a scale mock up on graph paper. Or do a 2-D...

    Do a scale mock up on graph paper.

    Or do a 2-D using cardboard sections glued together with a hot glue gun. lap cardboard "ducts" together. Use this as a pattern to transfer to the metal.
  20. Replies
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    Where is the energy saved? Compressor running...

    Where is the energy saved? Compressor running through out the cooling season vs. chill water cooling plus a little bit of resistance heating in January. Fiqure 10 to 1 ratio on efficience on...
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    Cold air will condense without adequate vapor...

    Cold air will condense without adequate vapor barrier and cause a mold problem. Return air plenums must now also be duct material, at least in these parts. I think it has to do with Chinese drywall.
  22. Replies
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    Bad neutral will do that. Was the house peir and...

    Bad neutral will do that. Was the house peir and beam?
  23. Thread: Cmon Man

    by timjimbob
    Replies
    11
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    805

    You aren't dumping liquid into compressor.. It is...

    You aren't dumping liquid into compressor.. It is being metered through the small maifold parts and shrader valve, being diluted by warm returning suction line gases and flashing when it expands when...
  24. Ran into a problem with HP and low inside...

    Ran into a problem with HP and low inside temperature. Coil was not clearing ice because there was not enough sensible heat, inside. Defrost was not getting it done. Throws COP off when defrost is...
  25. Not all bad news. Use charge to purge lines...

    Not all bad news. Use charge to purge lines during brazing and leak check.
  26. Replies
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    1,267

    Indoor humidity should not be any different from...

    Indoor humidity should not be any different from last years situation, Heat doesn't alter RH with different types of systems.

    As forcomplaining customer, I will install OA stat and review defrost...
  27. Replies
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    1,267

    Record cold here with icy drizzle. Heat output...

    Record cold here with icy drizzle. Heat output might be low, but everything checks out ok when I look.

    No amount of explaining "warmer then room air" is heating the house but may feel cool to the...
  28. Replies
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    1,267

    How HP works, to a HO

    Any published papers explaining how a HP heat the room, but does not blow hot air?

    I have a customer driving me crazy. i cannot convince her that the HP IS working and heating to set point, just...
  29. Thread: grounding ?

    by timjimbob
    Replies
    25
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    2,678

    open neutral will often result in a low volt on...

    open neutral will often result in a low volt on one side of 120volt and a correstonding hi voltage on other side of 120 volt.

    Like this: read 90 volt on one plug and 150 volt on a second 120 volt...
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    blown fuse (closed thread)

    i feel we need to make the HO aware that the inspection of the disconnect is part of a air conditioning inspection. The issue with a burnt fuse will result in a ruined compressor or possible fire....
  31. Figure 33" furnace + 29" coil. 5 ton coil . Too...

    Figure 33" furnace + 29" coil. 5 ton coil . Too much!
  32. Figure 33" furnace + 29" coil. 5 ton coil

    Figure 33" furnace + 29" coil. 5 ton coil
  33. need advise in tight replacement furnace

    I am looking for a very short furnace/evap combo for Horizantal application.

    Think I may need to have return enter side or back of blower cabinet, but not bottom.

    All suggestions considered.
  34. Now how would you know with one year of use!!!

    Now how would you know with one year of use!!!
  35. Replies
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    York CU, I believe, have one shot service valve. ...

    York CU, I believe, have one shot service valve. They do not close off refrigerant flow.
    Question #1- Backseating servive valve will only isolate CU side of refrigerant system. You will still have...
  36. Fiberglass needs a very good vapor seal else...

    Fiberglass needs a very good vapor seal else water will get behind it and porur out. I like armorflex better. Closed cell.
  37. Replies
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    836

    double checkgas pressure through-out the firing. ...

    double checkgas pressure through-out the firing. I've had a leaky, gas line going to the house that had water in it and took on water. very dynamic and dependant on other appliances.
  38. Replies
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    1,252

    What is "combustion pressure" ? Is it off?

    What is "combustion pressure" ? Is it off?
  39. Replies
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    1,413

    Refrigerated cases dumped heat into space year...

    Refrigerated cases dumped heat into space year around. Assuming the CU were inside space.
  40. steel pipes need insulation. They will rust.

    steel pipes need insulation. They will rust.
  41. Replies
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    Think RA needs to be bigger. good Sheet metal...

    Think RA needs to be bigger.

    good Sheet metal shop can figure a matchup. I f you really can't figure a curb adapter, you can use side discharge and field build the connections
  42. Sweating pipes in a Chws retrofit is a problem. ...

    Sweating pipes in a Chws retrofit is a problem. Very hard to make them drip free.
  43. Compressors use refrigerant charge to cool the...

    Compressors use refrigerant charge to cool the compressor motor. Lack of adequate freon charge will overheat the compressor motor. That is one reason why.
  44. Replies
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    Are we talking 8 feet? 3.5kw, what is that in...

    Are we talking 8 feet? 3.5kw, what is that in BTUs?

    Size of CU connection has no bearing on pipe size.

    Sorry, I still not up to speed.
  45. Have a #??model

    Have a #??model
  46. Replies
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    i had a powered, 24VAC, duct heater feeding into...

    i had a powered, 24VAC, duct heater feeding into the AHU. stat wires were crossed at thermostat Rc-Rh link. 24 volt were then jacked up to 480 volts through contro transformer.
  47. Replies
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    570

    Screws may be covered with little plastic white...

    Screws may be covered with little plastic white cover that pop off.
  48. Replies
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    1,228

    If you study the schematic, you will probably see...

    If you study the schematic, you will probably see a clear path on how the voltage is feeding to the zero leg.

    I've posted this at other post. Never assume there is no danger if you pull all three...
  49. Replies
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    570

    Look for tic marks on plastic housing. A paint...

    Look for tic marks on plastic housing. A paint can lid remover can pop the catch. Make sure to take air filter out.
  50. Replies
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    683

    1 watt=3.4 btus..always

    1 watt=3.4 btus..always
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