I want [b]your[/b] opinion
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  1. #1
    O.K, here it is:

    a combo system with many cases on one liquid line and L.L.S at each case controlled by temperature, store specs.

    Now some of those cases have suction stops controlled by a t-stat, from the manufacturer.

    Since the temp in the case is controlled by the L.L.S, do you set the suction stop t-stat to desired temp (sort of like a back-up) or do you set it as low as it goes and let the L.L.S do its job?


  2. #2
    For tightest control cycle both valves together on one t-stat to avoid pumping down between cycles, but close only the LLSV for defrost to force pump-down and promote good oil return periodically.

  3. #3
    Join Date
    Aug 2002
    Location
    Orange County CA
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    Are all these cases same type?




    You said some cases have SS and LL solinoids?

    Service meat cases use SS for temp control ,I can't think of anything else that needs to. I'd use the LL for anything else.

    Is one compresser running all this?

    I don't like all these stats and solinoids..the suction must be all over the place.


  4. #4
    I should have clarified. This is one circuit on one rack.

    And yes, these are service cases online with some MDDL and cheese island, and bakery cases, and anything else they wanted on it. Total of 13 cases.

    I like the idea to cycle both together since I already have the SS in the cases.

    I'm asking because we have no company policy on it, just whatever the start-up tech sets it for. I myself dump the SS to the lowest setting, since the STORE plans call for the LLS to control it, and that's how it's printed on the refrigeration schedule.

    As for temp and defrost, COMTROL controls each LLS at the cases.

  5. #5
    Originally posted by NedFlanders



    Service meat cases use SS for temp control ,I can't think of anything else that needs to. I'd use the LL for anything else.
    I have to agree with Ned. Any type of fixture that has humidity sensitive produce should use the suction stop for the main control. That would be any type of service case, flowers, meat holding bow where meat is unwrapper etc. For all the rest LL Sol val is just fine. Both is overkill. If you must do both use one tstat to control both valves

  6. #6
    Well, this chain has taken to putting misting systems in their service cases in order to use the LLS as main control. While it looks real cool when it turns on, it's becoming a frozen case problem since they do not clean these cases, even though the product is pulled at the end of the day.

  7. #7
    suction stop will help with the icing problem too. when the valve closes refrigeration stops right now.coils has to start getting warmer. most case makers require suction stop on gravity cases, which I assume these are

  8. #8
    No, the coil is not a problem. The defrost is at night, all night when the case is empty. I'm talking about the pan area, the drain and the pipes there.

  9. #9
    Join Date
    Aug 2002
    Location
    Orange County CA
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    Jerry , I know who you work for

    Float everything on the suction group in the Comtrol and cycle the SS for the service case for temp.

    Make Pete C.( Anaheim ) proud

  10. #10
    Join Date
    Sep 2001
    Location
    East Stroudsburg, PA
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    13,215

    Thumbs up

    I'm with Ned.


  11. #11
    Originally posted by NedFlanders
    Jerry , I know who you work for

    Float everything on the suction group in the Comtrol and cycle the SS for the service case for temp.

    Make Pete C.( Anaheim ) proud
    I'd like to, but at this account we cannot mess with the EMS. Whatever the store prints say is what we have to do. Even though they were modified 9 times during construction and thrice since. I see it as let the stores learn their lesson. The employees are already asking us to change this and change that, but we can't. Oh well.
    And I'm not gonna say a thing about this branch.

  12. #12
    Join Date
    Aug 2002
    Location
    Orange County CA
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    Hands tied huh?....aint it great..it's like Wal-Mart work(hehe)

  13. #13
    Join Date
    Aug 2002
    Location
    Orange County CA
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    Originally posted by condenseddave
    I'm with Ned.

    You see that? I must be right this time

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