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  1. #1
    Join Date
    Mar 2012
    Location
    Sacramento
    Posts
    36

    Need some pro advice

    Hey guyS,



    HErs the deal, it's start up time I have 150 units to do, I've have about hafe of them done, they are r410a heat pumps, the unit iam dealing with is a 2.5 ton here is my data suction side 68 psi sh 28 liquid side 267 psi 22 subcooling, when the compressor starts up it sounds like ther is liquid in it, it seems like its having a hard time to start, the head pressure would jump up all the way to 530 psi and then slowly go Down,and then stays around 275 or so the suction Side would start to drop to 75 psi and then slowly go down to around 58 psi so the compressor to the service valve starts to freez and fast. I have discovered the the hvac Forman at the job sight has put baffles in all the supply runs I don't know what the airflow across the evap is I will tomorrow but would low airflow and an overcharg system freez up the compressor to the service valve or would it just freez the evap coil . Ian thinking the evap is flooded but I would like to know what u pros think. Thanks

  2. #2
    Join Date
    Mar 2012
    Location
    New Hampshire
    Posts
    84
    That made my head hurt....

    For professional advise, apply for professional status.


    "I don't know why it be like it is, but it do"

  3. #3
    Join Date
    Mar 2012
    Location
    Sacramento
    Posts
    36
    Mine tO!

  4. #4
    Join Date
    Jul 2009
    Location
    Columbia, MD
    Posts
    4,222
    Need more info. Anything we say right now is like a fart in a wind storm and will mean nothing.

  5. #5
    Join Date
    Mar 2012
    Location
    Sacramento
    Posts
    36
    Will this help?

  6. #6
    Join Date
    Mar 2012
    Location
    Sacramento
    Posts
    36
    Outside air 69 idwb 55,let me know what eise do you need thanks!

  7. #7
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,317
    Don't think its just an air flow problem. With 68 PSIG on an R410A system with 28°SH, you most likely have a refrigerant flow problem.
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