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Thread: Valve "Hunting"

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  1. 12-08-2001, 11:39 PM #1
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    Abe
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    Valve "Hunting"

    My "book" wont arrive for a while so I have another question.....

    TXV hunting........How does one ascertain when a valve is doing this, a recent installation the back pressure kept fluctuating between 30 Psi and 25 Psi, which I can gather was the valve shutting down and opening up again. I could also tell from the compressor noise as the load increased and decreased. Was the valve hunting? Or should the back pressure have remained stable throughout its operation with a minimal fluctuation.
    System was running on R404a, 1.5hp hermetic LBP compressor, chilling down to +1 C.(cabinet ytemp)
    Evaporating temperature around -28C.
    Danfoss valve with a number 1 orifice, or capsule....
    Valve bulb was fixed tight to the side of the return pipe on the evaporator.
    Last edited by Abe; 21-10-2001 at 07:22 PM.
    Any opinions, statements and facts expressed in this message do not constitute legal advice in any shape or form and is given for a general outlook in nature. You are advised to seek appropriate and specific professional assistance from a regulated and authorised advisor for definitive advice.
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