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  1. ?

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  2. That is news to me.. How is it they are...

    That is news to me.. How is it they are differentiated with a shared airstream providing comfort?
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    Dirty air is heavy.

    Dirty air is heavy.
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    I'd pull the blower and clean it real nice.

    I'd pull the blower and clean it real nice.
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    VFD compressors

    They make sense on electrical savings however how do they still offer the horsepower needed for oil return on low load conditions?
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    Boilers.

    What kind of loop is best fitting for a consistent heating pattern throughout the home? Do tankless water heaters do a better job than combinations?
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    Buck and boost.

    Buck and boost.
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    Transformers VA rating is increased upon...

    Transformers VA rating is increased upon switching the load and shorts through the primary winding due to a voltage fluctuation from the supplier.. ?
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    I've used Nu-Cal products and my only complaint...

    I've used Nu-Cal products and my only complaint is the rash I tend to get from acid splashes. Works great on brake dust!
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    Has anyone ever considered a vinigar solution to...

    Has anyone ever considered a vinigar solution to prewash the coil followed bye a calcium chloride powder and washed off with a mild ammonia solution? In addition, I wonder about a simple bleach...
  11. Thread: E=ymc2

    by Joseph'bidness
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    E=ymc2

    Floating drive shafts, only read about them.
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    Think

    I'm not sure why nobody would just tell you simply. The H terminal is for humidity and when you do rip that furnace and board out an infinity control will label terminals ABCD and keep them color...
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    Zoned out

    Infinity, vision pro 8000, or any other combat control to cut off air is needed for comfort climate control when occupancy is relevant to efficiency. I've tested zoning bye activating the damper...
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    Dead Refrigeration

    I use to work in a morgue too but I threw away the formalin and prepared body tissues for the incinerator while keeping a tidy leg locker. I'd be in there for hours, just rummaging through surgical...
  15. Flush Nothing

    Carrier came out with a memo in 2013 to not use flush for the sake of keeping oil on the rings from disintegrating. There were some instances where the flush would not be fully removed from the line...
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    Customers and Bosses

    I've literally been abused bye customers as a tech for other people and companies. I've been held hostage and called the police after the customer abruptly threw me in my seat and stole my keys...
  17. Specific answers around variable speed...

    Specific answers around variable speed compressors will be appreciated. I also wonder if rifling refrigerant tubing would be a "way" worth weighing...
  18. Comfort, comfort your people, says your God. Isaiah 40:1

    Egypt once used reeds by the sea for comfort control. They would hang them upside down dipped in water to let air blow through the window they shaded. The Pharos walls would be removed from three...
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    The other day I had another secondary hose fail...

    The other day I had another secondary hose fail on a brand new Carrier Infinity furnace. The collector box had a slippery nipple and the hose would not stay clamped. Why don't these furnaces come...
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    [QUOTE=chuckcrj;15349321]Wow, where to start? ...

    [QUOTE=chuckcrj;15349321]Wow, where to start?

    The fact is, an orange/yellow flame is almost always hotter than a blue flame. Without taking o2 readings in the flue, you have no idea of flame...
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    You can also take the delta T of duct temperature...

    You can also take the delta T of duct temperature to the surrounding air and divide it by fifteen to get an estimated R value. For example, 150 degree attic with a 50 degree duct should have at...
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    Check the sensible heat rise for dry bulb...

    Check the sensible heat rise for dry bulb temperature using HTM 1.08. Make sure your getting good airflow and then check static pressures. Convert them to velocity pressure for the cross sectional...
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    I would love to see complete combustion but...

    I would love to see complete combustion but that's even impossible for the suN.
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    Bright noxxx cleaner

    Just cleaning the debris from foreign creatures allows the orange in a flame to subside, yielding a hotter burn. This tinge of impingement occurs due to dust for the most part; however it can...
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    I already used a flashlight to confirm no visible...

    I already used a flashlight to confirm no visible cracks.
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    Extreme burner efficiency

    Cleaning debris on a motor blower wheel can cut the air better, and move more air. An in shot burner deliveres roughly twenty thousand b.t.u.'s each upon ignition. Let me say, maintenance only...
  27. Why not use a water fill/flow sensor teed into...

    Why not use a water fill/flow sensor teed into the dispenser line to keep the cup constantly filled with cool water? .33 is a problem repeating, I'd rather keep my cup at least .50
  28. True, but with the water cup full it is clearly...

    True, but with the water cup full it is clearly better designed.
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    Flushing with nitrogen is recommended and...

    Flushing with nitrogen is recommended and injecting hemoglobin is my brainstorm idea.. I guess they need to watch the money because of those beautiful Bristols..
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    Carrier suggested through a memo last summer not...

    Carrier suggested through a memo last summer not to use the flush on their units upon changing over to 410a or cleaning lines due to the residue that coats seals and keeps them from being oiled...
  31. It was a domestic refrigerator/freezer using...

    It was a domestic refrigerator/freezer using R134a...
  32. Refrigerant to cool compressor windings

    I piped a compressor discharge to an oil cooler (a small cup containing drain water from freezer and a copper coiled discharge line submerged), then to the oil port on the compressor, and finally out...
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    There is no such thing as extra virgin olive oil...

    There is no such thing as extra virgin olive oil either... Interesting fact picked up from Italy.. Anyways, I would think it can pump four to seven ounces per stroke. I would feed the tube through...
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    Oil

    Not enough to fill the frying pan that's for sure... I haven't used either. Only changed oil once, and I dumped it out...
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    I don't change oil much... The dealer I have been...

    I don't change oil much... The dealer I have been doing work for is far more interested in just replacing stuff anyhow...
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    Pay at the pump

    http://www.bestbuyheatingandairconditioning.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=PUMP48140&Category_Code=C3
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    I've even seen some guys in commercial...

    I've even seen some guys in commercial applications put ball valves on top of expansion tanks.. Older properties are expensive to convert to the newer technologies which save the facility dollars. ...
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    [QUOTE=MHall;15283531]Thanks for the replies. ...

    [QUOTE=MHall;15283531]Thanks for the replies.

    Another question I have; " Are high pressure boilers used only in older properties"?? It seems that this method of heating hasn't been used in new...
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    P.s. I keep saying hemoglobin in refrigerant...

    P.s. I keep saying hemoglobin in refrigerant lines would take iron to transport oxygen. Imagine a surfactant lined purge system for non condensable gases?
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    If I suspected non condensable gases by doing the...

    If I suspected non condensable gases by doing the test you described, I would recover the hydrochlorofluorocarbons, pressurize to test tolerances of nameplate data, isolate the system into three...
  41. Just remember the amount of degree days, and the...

    Just remember the amount of degree days, and the design temperature...

    p.s. Hemoglobin in refrigeration lines might be an oxygen transporter but it would take iron. Imagine a surfactant lined...
  42. Hello Christopher, Manual J is a form that...

    Hello Christopher,
    Manual J is a form that indicates the heat loss/gain load. Manual D is for duct design, Manual S is for equipment and Manual T for those eight beautiful inlaid walnut...
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    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...
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    This is the Ask Our Pro's forum. In order to post...

    This is the Ask Our Pro's forum. In order to post a response here, you must have verified qualifications and have been approved by the AOP Committee. You may ask a question by starting a new thread....
  45. The other perplexing quandary with airflow in my...

    The other perplexing quandary with airflow in my mind is registers. Most of what I see is four by ten which doesn't have the c.f.m at face value equal to a six inch duct. I'm not sure if its an...
  46. What I was missing was the design friction rate...

    What I was missing was the design friction rate value. I've learned that the available static pressure multiplied by one hundred and divided by the total equivalent length allows you to use the...
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    Heat pumps are also simple e.e.r. Calc. And a...

    Heat pumps are also simple e.e.r. Calc. And a temp rise for c.f.m. is generally with in ten percent from my experience. I have been seeing three and a half ton systems delivering nine hundred...
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    Then you need to clock the meter, if its a n.g...

    Then you need to clock the meter, if its a n.g system, to first verify actual input, so your output off of an efficiency value is projected by the afue unless an anylyzer is used.
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    Timing is everything, really.

    Timing is everything, really.
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    Your gas valve should have voltage for about four...

    Your gas valve should have voltage for about four seconds after the igniter has glowed which is about seventeen to roughly twenty five seconds. Measure the voltage at the valve and see if it is...
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