Low Refrigerant
Low Refrigerant
(OP)
Can someone provide the theoretical and practical reasons that low refrigerant will cause icing on the outside of the evaporator?
Thanks
Thanks
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RE: Low Refrigerant
RE: Low Refrigerant
RE: Low Refrigerant
With flow in =flow out,won't the expansion valve open further to Carry the heat load? If so, how does this lower pressure in the evaporator?
Thanks so far for your prompt replies.
RE: Low Refrigerant
RE: Low Refrigerant
Because the charge is low, you don't have enough refrigerant in the system to fill the liquid line with liquid.
For any given pressure drop across the expansion valve the mass flow rate of a mixture of gas and liquid will be less than for pure liquid.
So the valve opens. It opens as far as it can, then it can't open any farther.
Mass flow reduces and suction pressure falls.