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  1. Replies
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    212

    As an addition: If the fan was in "on" mode and...

    As an addition:
    If the fan was in "on" mode and compressor wasn't running, just cycling the indoor air, you prob would not have seen a diff across the coil.
    A thought.
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    264

    Dry Cooler Sequence

    Does anyone know of any stats/studies done on:
    Staging a dry coolers fans and efficiency or temp drop?

    I have seen them staged starting from the manifold end and starting from the opposite end...
  3. Replies
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    881

    Nice insight hvacker, thanks and agreed.

    Nice insight hvacker, thanks and agreed.
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    881

    Our lead HVAC tech made the claim to fame on this...

    Our lead HVAC tech made the claim to fame on this one.
    I asked at the beginning what we were varying the drives off of , the return loop?
    and it was stated
    Quote: all you need to do is slow it...
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    881

    The vfd's are placed in manual override and we...

    The vfd's are placed in manual override and we can vary the speed with the potentiometer.
    The three way valves we do have offset the air handlers they serve, but we do not have control on a floor...
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    743

    The gauge will reference what you are trying to...

    The gauge will reference what you are trying to measure.
    Example:
    State a input to the magnehelic is placed before your filters is a constant pressure,
    The other side would be installed after...
  7. We have used HotShot for years and never have had...

    We have used HotShot for years and never have had a problem with it.
    ICOR has a new app as well which is a great one for quick referencing.
    Agree on the 80% and let it balance well before you...
  8. Replies
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    2,701

    I myself have slowly learned that refreshing...

    I myself have slowly learned that refreshing yourself on any training is a huge help on staying up to date with ever changing technology.
    You won't know everything and those who think they do are...
  9. Replies
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    2,578

    This seems far fetched but, do the fins on the...

    This seems far fetched but, do the fins on the evap coil lead to the drain pan?
    I was guessing the condensate was catching half way down on a horizontal fin evap which should have been horizontal or...
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    http://www.hvacpartsshop.com/GCS24%20Series.pdf ...

    http://www.hvacpartsshop.com/GCS24%20Series.pdf

    Pages 34-35 on give a schematic and a decent detail of what is going on in the circuitry.
    Thought it might be helpful for you.
  11. Replies
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    634

    Makeup air is a separate control offset with the...

    Makeup air is a separate control offset with the relief damper.
    I'm assuming it has been wrong since the dawn of time.
    It is a multi zone unit with is controlled individually , five zones, via...
  12. Replies
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    881

    No stats on the loops on any of the loop. Oddly...

    No stats on the loops on any of the loop.
    Oddly the only thing that us controlling anything is the pump being constant volume.
    I am seriously debating if we do not have a natural circulation with...
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    388

    Sounds like an old timer giving you tricks. I...

    Sounds like an old timer giving you tricks.
    I play it safe and follow the specs on the jug,
    Figure you save yourself by taking a few minutes and figuring out your system size and go about it the...
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    2,248

    We scrap everything also, and if you don't...

    We scrap everything also, and if you don't separate the metals you don't get what it's worth.
    I agree, use some free time to rip it apart and enjoy a buck or two.
    We have a 60 ton coil going back...
  15. Replies
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    600

    From any of my calculations we are not going to...

    From any of my calculations we are not going to see any investment in the pumps.
    I have placed them inline for flow control to slow down the flow.
    Odd situation is we are not modulating them on...
  16. Replies
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    881

    VFD config. on pumps

    We have a began the install of adding VFD's to our heating loop on 2HP motors or less.
    I am being told that on a 6 story building with 3 separate wings fed off of the main, with their own supply...
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    Damper control

    We have a split coil, hot deck/cold deck ahu which is supplying a single area in our building.
    Statement was brought up that we couldn't satisfy on hot days and never have been, the unit was to...
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    Damper control.

    We have a split coil, hot deck/cold deck water unit which is supplying a single area in our building.
    Statement was brought up that we couldn't satisfy on hot days and never have been, the unit was...
  19. Replies
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    600

    VFD's on pumps.

    We have a began the install of adding VFD's to our heating loop on 2HP motors or less.
    I am being told that on a 6 story building with 3 separate wings fed off of the main, with their own supply...
  20. I have the same situation with every tech I come...

    I have the same situation with every tech I come in contact with,,, in fact I have 2 50 pound recovery tanks at my job with 50 pounds of r22 in them. (not recovered by myself) But is is un-nerving...
  21. Does the exterior unit have a temp control for...

    Does the exterior unit have a temp control for fan and compressor cycling / defrost. Wondering if the sensor could be out of calibration or settings wrong which would shut off your exterior unit....
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    AOP violation

    I have a question as to what parts of the site I can post on.
    I got kicked off for a few weeks for the violation and am wanting to get my min posts to become a prof. member but do not want to get...
  23. Replies
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    1,278

    You can read continuity through the switch if it...

    You can read continuity through the switch if it is ok. If pressure falls for a low pressure, or rises for a high pressure then you would not read continuity through the switch. This also goes with...
  24. Replies
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    Slow Recovery

    This is just a tech tip.

    We have 103 degrees temps, trying to recover a 100 pound system. It just isnt pulling. Shut off the fans on a four stage, two compressor r-22 McQuay DX system.
    ...
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    I have done studies on this things only because...

    I have done studies on this things only because they loooove my backyard and I hate them. They love cool and dark areas and hide in them. I dont think that this is because of the contactor. Try...
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