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  1. #1

    Question about charging semi hermetic fridge

    This is my first post and i'm glad to be apart of this hvac forum, as a fresh out of school worker I still run into things I either have to retained or never caught on to. But i'm trying hard to learn everything. I'm a electrician by trade but thought in this economy two trades is better than 1 to keep me working.

    Question. What should suction pressure be on a 38deg cooler running r22 in a chilled water system. ?

    I have charged up semi hermetic before, and I always charged up based on sight glass and head pressure. Yesterday, I was charging a system and it dawned on me I dont know what the suction pressure should be. I know the reciever is there and will deter too much refrigerant from entering evap, but is there a way to tell what the suction should be?

  2. #2
    Join Date
    Mar 2009
    Location
    Mid-Mo
    Posts
    3,596
    Welcome to the trade and the site. Seems like you need to get your post count up and apply for pro membership, that way you can get some really good answers to your needs.

  3. #3
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,639
    The PT chart is your friend
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

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