Results 1 to 7 of 7
  1. #1
    Join Date
    Apr 2010
    Location
    Ontario
    Posts
    474

    Testing pressure switches

    Have a customer with a 25 ton water cooled chiller that wants the high and low pressure switches tested on his refrigeration equipment. The switches are the encapsulated type. I need to confirm the switches work, not just remove wires from the switch. Customer does'nt want me running the discharge pressure up and having the suction pressure drop artificially to trip the switches. Has anyone removed all the refrigerant or added tubing or small valves to isolate the switches to make this test with nitrogen?
    I need to do the test every year.
    ENJOY THE RIDE

  2. #2
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    Most encapsulated pressure switches are mounted on schroeder cores, not all call manufacturer to find out for sure. If they are just pop them off and test with nitro on a manifold. If they are not you may have to pull it down. I'd put them back on Schroeders so next year you don't have to pull it down.

  3. #3
    Join Date
    Mar 2004
    Location
    SE Michigan
    Posts
    17,887
    Whats a shroeder core? Unless you mean shrader valve core?
    " Kill a Commie for Mommy! "

    - Colonel David Hackworth (1930-2005), Korean War Vet

  4. #4
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    Quote Originally Posted by coolwhip View Post
    Whats a shroeder core? Unless you mean shrader valve core?
    . iPhone.

  5. #5
    Join Date
    Mar 2004
    Location
    SE Michigan
    Posts
    17,887
    lolz!
    " Kill a Commie for Mommy! "

    - Colonel David Hackworth (1930-2005), Korean War Vet

  6. #6
    Join Date
    Dec 2010
    Location
    Down by the river
    Posts
    1,646
    Do not put a high pressure safety device on a valve, and low only on a king valve, not ball style.

    Would rather them be on schrader's though.

    Second calling mfg for info

  7. #7
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    Quote Originally Posted by Southern Mech View Post
    Do not put a high pressure safety device on a valve, and low only on a king valve, not ball style.

    Would rather them be on schrader's though.

    Second calling mfg for info
    Absolutely rite! Schraders only. Never ever put a high pressure safety on a valve that can be closed. Bad things can happen.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event