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  1. #1
    Join Date
    Feb 2006
    Location
    indiana
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    77

    chargeing with 404a

    is it ok to charge walk in freezer to full sight glass . no receiver water cooled condenser

  2. #2
    Join Date
    Sep 2007
    Location
    NH
    Posts
    1,213
    Should have a receiver if you have a tx valve.

  3. #3
    Join Date
    Oct 2011
    Location
    Chicagoland Area
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    4,830
    Quote Originally Posted by Dchappa21 View Post
    Should have a receiver if you have a tx valve.
    Not if it's not a pumpdown. Might just be using a t-stat to control compressor. A clear glass would be a starting point. SC & SH would be the proper way to go. Make sure the water regulating valve is set properly.
    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

  4. #4
    Join Date
    Feb 2006
    Location
    indiana
    Posts
    77
    cycles on liquid line solinoid valve.compressor took a poop, was called to change out. copeland copelematic m. nrdi 031a tcf 800. going to change oil to ester before install. as well as ll drier and contactor. noticed someone has added suction drier canister with one core.no idea on history,not to familiar with low temp systems. thats why im asking about the charge.thanks

  5. #5
    Join Date
    Sep 2007
    Location
    NH
    Posts
    1,213
    Quote Originally Posted by 2sac View Post
    Not if it's not a pumpdown. Might just be using a t-stat to control compressor. A clear glass would be a starting point. SC & SH would be the proper way to go. Make sure the water regulating valve is set properly.
    You ever tried charging a system with no receiver to a full glass???? It's never work well for me unless the condenser is oversized. They always spike the discharge pressure when the valve starts to throttle.

  6. #6
    Join Date
    Oct 2011
    Location
    Chicagoland Area
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    4,830
    Quote Originally Posted by Dchappa21 View Post
    You ever tried charging a system with no receiver to a full glass???? It's never work well for me unless the condenser is oversized. They always spike the discharge pressure when the valve starts to throttle.

    I may have, who knows? Which is why I said use it as a starting point and adjust as necessary. I normally don't see sight glasses on units without receivers.
    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

  7. #7
    Join Date
    Jul 2000
    Location
    Guayaquil EC
    Posts
    10,478
    From the description this sounds like a WJWL water-cooled condensing unit, which has a shell & tube condenser...referred to in the old days as a condenser/receiver.

    The refrigerant flows through the shell and the water through the tubes so there a significant liquid storage capacity with these condensers. I found some specs which indicate that this unit would have a pumpdown capacity of about 42 lbs...not bad for a 3 HP unit.

    Here's a drawing:

    WJWL-0300.pdf

  8. #8
    Join Date
    Sep 2002
    Location
    Virginia
    Posts
    3,327
    No receiver ??

    Is this condenser indoor on top of freezer ?

  9. #9
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,830
    You've got a receiver. Check under the condensing unit
    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

  10. #10
    Join Date
    Oct 2012
    Posts
    10
    Yeaa full sight glass is a good start but then after you notice the bubbles just starting to disappear, start doing SH and SC. You don't want to over charge..

  11. #11
    Join Date
    Feb 2008
    Location
    California
    Posts
    2,071
    The Pump & Dump was popular a few years ago...but I'm starting to become a family man.

  12. #12
    Join Date
    Oct 2003
    Location
    tidewater, va
    Posts
    2,147
    Quote Originally Posted by Phase Loss View Post
    The Pump & Dump was popular a few years ago...but I'm starting to become a family man.
    lol

  13. #13
    Join Date
    Oct 2009
    Location
    Raleigh, NC
    Posts
    802
    Yeah, I bet there is a receiver under the unit.

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