1. Welcome to Hvacproforums, an interactive community exclusively for HVAC professionals. The collective years of HVAC experience and the knowledge our forum members share make this an invaluable resource for those in the HVAC industry. We have a lot of fun, but make no mistake, we are pros. Hvacproforums is self supporting ...there are NO advertisers here. Do-it-yourselfers and Homeowners are encouraged to seek information elsewhere. Those involved in the HVAC industry are urged to register. its 100% free and easy, Once registered you will have access to the technical forums, Be sure to click over to the new members forum and introduce yourself after registering!

Identify Yourself!

Discussion in 'Commercial' started by Zman, May 20, 2017.

  1. Zman

    Zman Hanging by a Thread

    Messages:
    746
    Location:
    The "I know a Guy" State
    Any good tips on how to identify which split System Condenser connects indoors on commercial rooftops,with multiple units?By the time the 5 minute compressor delay kicks in,another nearby unit can start up,so it hard to identify by just having someone turn up the tstat.I thought about tying 2 low volt wires together and ohm out from the other end,or bypass the tstat delay with a jumper so compressor starts and stops instantly.But still time consuming.Should be Property owner's or installers responsibility,i would think.
     
    Daryl_Dixon likes this.
  2. mike1020

    mike1020 entitled millennial

    Messages:
    17,745
    Location:
    SoDoSoPa
    Jumper y, disconnect g, go and see which condensing unit suction line starts to frost.

    Then kill disconnect on condensing unit, go down to air handler and see if Refrigeration has shut off.
     
    R2D2-TX, Whoissantos and Zman like this.
  3. Daryl_Dixon

    Daryl_Dixon New Member

    Messages:
    3,670
    So much of our job is ^that^ sort of bullshit. Yes, it should be the installing contractor's job. Good luck with that though.:shots:
     
    Zman likes this.
  4. mike1020

    mike1020 entitled millennial

    Messages:
    17,745
    Location:
    SoDoSoPa
    We have problems with the markets where a case will alarm on the controller, but the cases are labeled wrong, and then somebody will work on the wrong case for six hours.

    So I either disconnect the sensor, or if there's slack in the leads, hang it outside the case and look at the controller and see if it reads open sensor or reads warm, respectively. That way you know you have the right case.
     
    Zman, Daryl_Dixon and crackertech like this.
  5. crackertech

    crackertech assholiness *

    Messages:
    90,464
    Location:
    Fl/IN/Ga/Ms/TX/NJ/VA/NC/TN

    Yep
     
    mike1020 likes this.
  6. mike1020

    mike1020 entitled millennial

    Messages:
    17,745
    Location:
    SoDoSoPa
    I know not everyone does markets but if you do that should help
     
  7. crackertech

    crackertech assholiness *

    Messages:
    90,464
    Location:
    Fl/IN/Ga/Ms/TX/NJ/VA/NC/TN
  8. Daryl_Dixon

    Daryl_Dixon New Member

    Messages:
    3,670
    We had a guy put the RTU on the wrong roof.
    Rule #1 - Make sure you are working on the correct item.
     
    rumppie likes this.
  9. Jay 41

    Jay 41 Whole-ass

    Messages:
    141,290
    Location:
    Madiganistan
     
    Chuck likes this.
  10. Jay 41

    Jay 41 Whole-ass

    Messages:
    141,290
    Location:
    Madiganistan
    damn...:lachen::lachen::lachen::lachen::lachen::lachen::lachen::lachen:
     
  11. crackertech

    crackertech assholiness *

    Messages:
    90,464
    Location:
    Fl/IN/Ga/Ms/TX/NJ/VA/NC/TN
    I do comfort cooling and heating and R so I'm way better looking and super cool:D
     
  12. mike1020

    mike1020 entitled millennial

    Messages:
    17,745
    Location:
    SoDoSoPa
    And Rule 2 make sure it's the right phase and voltage
     
    Daryl_Dixon likes this.
  13. jays 65

    jays 65 New Member

    Messages:
    323
    ill put em in heat mode if they are heat pumps idc if its 90 outside lol
     
  14. Texas-Tech

    Texas-Tech Official Geezer*

    Messages:
    17,355
    Location:
    duhh
    Dreamer
     
  15. LemonWizard

    LemonWizard Blinky Lights Wizard

    Messages:
    2,065
    Location:
    Ohighyo
    We had a guy spend 4 hours troubleshooting the wrong store's unit on a mall. If you work on a mall, make sure you have a good sense of direction.
     
    mike1020 likes this.
  16. RoyalPain

    RoyalPain New Member

    Messages:
    1
    Get a $15 tone generator from Harbor freight. They are good on energized wires up to 24volts


    Sent from my iPhone using Tapatalk
     
    oroy54 likes this.
  17. crackertech

    crackertech assholiness *

    Messages:
    90,464
    Location:
    Fl/IN/Ga/Ms/TX/NJ/VA/NC/TN

    And you are who? Start a new members thread and tell us what you do in the trade
     
  18. frozensolid

    frozensolid Psychologist's Dream

    Messages:
    12,202
    Location:
    Earth
    Put a thousand ohm resistor between y and common going to the roof then ohm it out. Never leave an unmarked unit on the roof unmarked. Next time it may be someone else going back.
     
    Anita sannich and jpb2 like this.
  19. pecmsg

    pecmsg Junior my ASS

    Messages:
    20,523
    Location:
    Eastern LI
    He did.....

    Royal Pain!
     
  20. rumppie

    rumppie Noob

    Messages:
    29
    Location:
    Minnesota
    There were a couple guys doing a new install on a RTU here and had to dismantle the old one first.....dismatled the wrong unit, whoops.