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!

Micron g, vacuum pump

Discussion in 'Residential' started by JasonL, Sep 16, 2017.

  1. JasonL

    JasonL New Member

    Messages:
    17
    Hello all my sarcastic siblings in tech land. Im a first year tech who got thrown into the field this summer with no senior tech. So it was fun, i geuss. Any who i just read not to hook up your micron gauge to the T on your vacuum pump. So to my understanding you're not supposed to get refrigerant in the micron gauge. Could u guys be kind enough to explain to me where to put the MGauge so refrigerant doesn't get into it and also how you won't lose your vacuum when releasing refrigerant. Thank you. Oh and why does the instructions say change the oil after every vacuum but some text I speak with don't change it that often how often do you change yours. Mucho appreciado
     
  2. coldsnap

    coldsnap -20 on the money

    Messages:
    4,305
    Location:
    Wisconsin
    Tru tech tools has a good video explaining how to set up an evacuation
     
  3. coldsnap

    coldsnap -20 on the money

    Messages:
    4,305
    Location:
    Wisconsin
    Also, look up a thread on here called "pulling a vacuum"
     
  4. MOFO the psychic gorilla

    MOFO the psychic gorilla sitting on two achers

    Messages:
    1,851
    Answers might depend on what equipment you have connected to what.
     
  5. Rather B Riding

    Rather B Riding Behind bars

    Messages:
    568
    You don't have to change oil every time but every couple hours of run time is a good practice. New residential installs pull down fairly quick. The longer you go on the same oil the less effective the pump is.
     
    oroy54 and zamoramax like this.
  6. Rather B Riding

    Rather B Riding Behind bars

    Messages:
    568
    So true. If I pump down a nasty burn out. I change oil. Every time.
     
    zamoramax likes this.
  7. 404eh

    404eh New Member

    Messages:
    196
    I put the gauge on my unit or in line with unit TO gauge
    This measures the system vacuum opposed to the vacuum vacuum
     
    oroy54 likes this.
  8. oroy54

    oroy54 New Member

    Messages:
    22,556
    Location:
    Victoria, Texas
    Vehicle's use 2 ports also on the low side. Jason, I am not your sibling little son
     
    otto likes this.
  9. Anita sannich

    Anita sannich Exceptionally average

    Messages:
    554
    Location:
    Spokane WA
    Hope you're not using the word "sibling" on account of there being women in the crew, if anyone is offended by the word brother, pretty damn sure they're not in this forum, or in this field for that matter.
     
  10. Anita sannich

    Anita sannich Exceptionally average

    Messages:
    554
    Location:
    Spokane WA
    Hook your vacuum pump to the high side, and your micron gauge to the low side. Keep your gauges out of it. Low loss fittings are your friend.
     
  11. Chuck

    Chuck SSP

    Messages:
    7,849
    Location:
    LAX
    What's a micron gauge?
     
    Jon, Jay 41 and sline-dawg like this.
  12. oroy54

    oroy54 New Member

    Messages:
    22,556
    Location:
    Victoria, Texas
    Freezone in your gauges? Never heard of that. A second low side port, yes
     
  13. MOFO the psychic gorilla

    MOFO the psychic gorilla sitting on two achers

    Messages:
    1,851
    When you are evacuating on a service call pretty sure you are getting refrigerant in your gauge so don't worry about that. All it does is affect the reading until you evac it out. How much pressure your gauge can handle depends on the gauge. Mine says 500 psi so I don't worry about that either and just leave it attached to the low side while I charge.
     
  14. crackertech

    crackertech assholiness *

    Messages:
    91,106
    Location:
    Fl/IN/Ga/Ms/TX/NJ/VA/NC/TN
    I just purge that bitch and go :D
     
    jamesyarbrough, Jon, Catpower and 4 others like this.
  15. knave

    knave Undeterred

    Messages:
    8,166
    Location:
    Out for a rip
    In resi I generally attached the mg to the side of my vcrt.
     
    zamoramax likes this.
  16. knave

    knave Undeterred

    Messages:
    8,166
    Location:
    Out for a rip
    :dancenana:
     
    Last edited: Sep 17, 2017
  17. Zman

    Zman Hanging by a Thread

    Messages:
    938
    Location:
    The "I know a Guy" State
    Ain't the Refer that messes the microns, its the oil.
     
    zamoramax, Anita sannich and knave like this.
  18. Zman

    Zman Hanging by a Thread

    Messages:
    938
    Location:
    The "I know a Guy" State
    ...and me may be a lot of things, butts I ain't sack crap sticks.:D
     
  19. R/HVAC

    R/HVAC selfemployed

    Messages:
    459
    Location:
    W-S , NC
  20. R/HVAC

    R/HVAC selfemployed

    Messages:
    459
    Location:
    W-S , NC
    I don't know if your basing sibling on the Ark account, so here brother ;)
    webster.JPG
     
    Anita sannich likes this.