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  1. Static pressure should be .5"wc range. If you...

    Static pressure should be .5"wc range. If you have no static pressure control as was suggested then you will have no set point adjustment. I am unfamiliar with resi zoning systems but work...
  2. Control voltage that pulls in the contactor comes...

    Control voltage that pulls in the contactor comes from the AHU/Furnace not the condensing unit. Therefore opening the disconnect will not drop out the contactor. Power to the contactor and condensing...
  3. What type of static pressure control do you have?...

    What type of static pressure control do you have? Sounds like possibly to high causing noise through the damper. Try changing static set point (lower) see if that helps.
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    95 psig suction is low for 410a. That's...

    95 psig suction is low for 410a. That's equivalent to a 29° coil Check air flow.
  5. Thread: Freezing Coil

    by ckartson
    Replies
    31
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    2,000

    63°F house is unreasonable based on normal...

    63°F house is unreasonable based on normal design. As far as high side being 500 psig, what is the OAT? What subcooling do you have? During the design phase the Manual J requires indoor condition...
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    Google Tinnerman nuts, they make them also.

    Google Tinnerman nuts, they make them also.
  7. Thread: Freezing Coil

    by ckartson
    Replies
    31
    Views
    2,000

    Why was the 1/4 line left in in the first place,...

    Why was the 1/4 line left in in the first place, pretty small for a three ton system. Any chance of some details besides everything seems fine. Everything isn't fine if you saw the plenum icing. Do...
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    1,251

    Nine year old system is not old. A system...

    Nine year old system is not old. A system properly maintained should last 20 years. A compressor replacement with all the proper safe guards like a suction filter with a follow up visit for testing...
  9. High sh, the above would give you low sh. Are you...

    High sh, the above would give you low sh. Are you sure the compressor is ok?
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    476

    How many zones are you planning. 5 or less vav's...

    How many zones are you planning. 5 or less vav's is not worth it. VVT may be an option. There are many resi vvt controls systems out there.
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    3,724

    If the old unit was r22 and new unit is r410a...

    If the old unit was r22 and new unit is r410a then indoor coil should be replaced. That the only reason I would think it's required.
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    1,608

    No double time on Sunday?

    No double time on Sunday?
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    759

    Yaskawa, they also have some excellent e learning...

    Yaskawa, they also have some excellent e learning modules on their website. Tech support is also very good.
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    5
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    452

    Both can be used for modulating application but...

    Both can be used for modulating application but yes they are different piping configurations. I was just answering the OPs question whether they can or cannot, and with a modulating actuator they...
  15. Replies
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    1,395

    If you have CTI's (conventional Termostat...

    If you have CTI's (conventional Termostat Interface) installed in your units then all you need to do to test is jumper the terminals on the CTI to test. The CTI provides contact closure inputs rather...
  16. Replies
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    452

    Diverting and mixing can both be used for...

    Diverting and mixing can both be used for modulating. The valve operator installed on it will determine the operation also.
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    3,921

    Double suction risers with single circuit...

    Double suction risers with single circuit compressor unloaders would require inverted trap. Would also require other pipe sizing requirements also.
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    3
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    404

    What type of equipment, AHU's and controls do you...

    What type of equipment, AHU's and controls do you have?
  19. Replies
    13
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    744

    No it shouldn't probably the threaded cap needs...

    No it shouldn't probably the threaded cap needs to be tighten or taped
  20. Replies
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    1,335

    Return air 60°? I would think you should get the...

    Return air 60°? I would think you should get the return temp up then test.
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    591

    Yes it is funny along with, "going to collage"....

    Yes it is funny along with, "going to collage". Sorry I couldn't help myself.:grin2:
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    8,309

    Just "helpin out" the ex!

    Just "helpin out" the ex!
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    605

    Continue with schools, read on, but it will seem...

    Continue with schools, read on, but it will seem incomplete until you actually start working with the equipment. It's just how it is. It takes a few years of using the knowledge before it becomes...
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    744

    Cool building but it will cost you to air...

    Cool building but it will cost you to air condition it. Hope you got a good deal. How could you not know it wasn't air conditioned?
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    354

    Manyo561 U still there? He gave an excellent...

    Manyo561 U still there? He gave an excellent summary for you, kind of the Cliffs notes of refrigeration.
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