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Air to Water Heat Pump

ralph7 Member Posts: 3


    HVACNUT Member Posts: 4,591
    I'm not at all familiar with that setup but for starters, the refrigerant lines were triple vac'd to 500 microns and held?
    The charge is correct according to Space Paks specs? 
    Reversible drier?
    Are the blower motors PSC or ECM?
    Ductless or ducted or both?
    Indoor units match the capacity of the outdoor unit?
  • ralph7
    ralph7 Member Posts: 3
    Thanks for your comments 
    This unit is a Mononbloc .
    No refrigerant lines to connect, only water lines.
    The Heating System is Hydronic Radiant Floor. No fan coils 
    The compressor is an EVI Scroll type covered with an insulation blanket .
    The compressor makes quite a loud sound at shut down, like liquid
    or refrigerant gas dead heading 
    almost like a horn type sound.
    The evaporator coil fans are very loud also . More than 62 decibels as 
  • ratio
    ratio Member Posts: 3,174
    Have you tried the mfgr's tech support?
  • Ironman
    Ironman Member Posts: 6,868
    Obviously, the problem is internal to the unit. I’d call tech support.

    Never had that problem on what we installed.
    Bob Boan
    You can choose to do what you want, but you cannot choose the consequences.
    EBEBRATT-Ed Member Posts: 11,992
    Is this unit 1 phase or 3 phase wiring sounds like a scroll compressor running backwards?
  • ralph7
    ralph7 Member Posts: 3
    Single phase