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Oops maybe I should have asked you guys

Discussion in 'Commercial' started by Rather B Riding, Oct 24, 2017.

  1. Rather B Riding

    Rather B Riding Behind bars

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    I had a failed low pressure switch on a Trane TTA060 condenser. 2000 R 22 model. Horizontal air handler in a server room. Unit has a lot of extras on it to keep from killing the compressor one of which is a liquid solenoid. Its using the LLS and cycles on and off on the pressure switch. It failed and I asked 2 other techs. Does Trane have Schrader cores behind the switch or not. I got 1 I'm pretty sure there is and 1 I can't remember. I roll the dice because I thought there was a core. Guess what I was wrong there is no Schrader core. Lucky I had made an oh shit plan. I pumped it down to 10 psi. Valved off the condenser and everything I needed with in reach. I had that thing on so quick. I was sure there was a core till the old one was off but I was damn glad I pumped it down and had everything ready. I barely lost any juice but it could have been real bad. Who could have answered correctly core or no core.
     
    mike1020 likes this.
  2. jays 65

    jays 65 New Member

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    if im unsure ill recover refer. customers paying anyway not worth my hands,you can put a t on other low side port with a new low pressure switch and wire in if another ports available
     
    jpb2 likes this.
  3. 404eh

    404eh New Member

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    Good deal, I've seen high press switches replaced quick, pretty dangerous and stupid
     
  4. Texas-Tech

    Texas-Tech Official Geezer*

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    duhh
    They don't use them on hp switches on the package units, not sure about the lp side.
     
  5. doc havoc

    doc havoc A cunning linguist

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    That pisses me off. There's no phucking reason they can't put a stem in those fittings.
     
  6. Texas-Tech

    Texas-Tech Official Geezer*

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    I totally agree Torry, it's dangerous for the person that doesn't know
     
  7. Bustawrench

    Bustawrench Knucklehead

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    They don't put them under the HPS anymore because it voids the current UL/CE rules for certification.

    Not sure about the LPS.
     
  8. 404eh

    404eh New Member

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    If u ever install one i put them in just a few threads so that a flare fitting will work.
    Buuut if it ever needs replaced a tech can just thread the stem real fast
     
    Catpower likes this.
  9. Texas-Tech

    Texas-Tech Official Geezer*

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    What about OSHA, guess they can't be bothered. But get within 6 ft of the edge of a roof and whamo, gotta tie your self off. BS
     
    doc havoc and Rather B Riding like this.
  10. mike1020

    mike1020 entitled millennial

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    They told us 15 feet
     
  11. crackertech

    crackertech assholiness *

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    Nope it’s 6’
     
  12. Chuck

    Chuck SSP

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    I always assume one of two things will happen when I take a pressure switch off;

    1. There will be no core
    2. The core will not seat because it has been depressed forever

    So I always pump down to 5 psi before removing it, do it quick and gas it back up.
     
  13. crackertech

    crackertech assholiness *

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    I know a guy that use to change bad power heads that way.:D
     
    newtech, coldsnap, Jon and 1 other person like this.
  14. Texas-Tech

    Texas-Tech Official Geezer*

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    duhh
    You can tell as you unscrew it, after 2-3 revolutions and the pressure hasn't slowed down there is no core under it.
     
  15. Chuck

    Chuck SSP

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    I've never done that :cool:
     
  16. crackertech

    crackertech assholiness *

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    Me neither, I just new this crazy asshole that did, great guy but bat shit crazy.:D
     
  17. Texas-Tech

    Texas-Tech Official Geezer*

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    duhh
    Changed an Evap on a 25ton Aaon package, forgot both cores after we charged it I looked down and an oh shit moment for sure
     
    mike1020 likes this.
  18. Rather B Riding

    Rather B Riding Behind bars

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    I would have not done this if it was HP and there may have been liquid shooting out. Made that mistake a long time ago. It was LP the line set and evap were isolated. It held at 10 psi long enough that I was sure it was just vapor. It was just a little section suction pipe between the compressor and the valve. Point was that I was ready for either case.
     
  19. Jon

    Jon Team Canada

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    There's another way ? :headscratch:
     
    knave likes this.
  20. Daryl_Dixon

    Daryl_Dixon New Member

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    Because it could possibly cause an obstruction and not alert in a dangerous high pressure situation?