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The pressure of R404A for recharging a refrigerator can vary depending on the specific refrigerator model and the manufacturer's recommendations. However, typical recommended operating pressures for R404A refrigerant in a refrigerator range from about 160 psi to 250 psi on the low side and from 250 psi to 350 psi on the high side. It's crucial to consult the refrigerator's instruction manual or a qualified technician to ensure the correct pressure levels are maintained during recharging.
A refrigerator should sit upright for at least 24 hours after moving before plugging it in to allow the refrigerant to settle.
If the pressures are always equal running, the compressor is bad and would need replaced
18-20psig suction 250-270 psig discharge In freezers pressures are ok .I got it ,but the mention pressure of suction 18-20 discharge 250-270 at what temprature in centegrade it should be.
300psi
in the refrigerator
do not siphon refrigerant by mouth
A refrigerator is basically an air conditioning system. There is a high (discharge) and a low (vacuum) side to such systems. As it goes through the system, the refrigerant will change state (e.g., high pressure vapor to high pressure liquid, high pressure liquid to low pressure liquid, low pressure liquid to low pressure vapor, low pressure vapor back to high pressure vapor). This facilitates the absorption of heat from the refrigerator compartment and the exchange of that heat to the ambient air. What you're seeing there are the pressure readings (in psig) of the high pressure and low pressure sides of that system. Your refrigerator and an automotive AC system use different refrigerants, and thus have different system operating temperatures. While those numbers would be excessively high on an automotive system, I don't know if that's the case with a refrigerator. You'd need to inquire with a qualified service professional on the matter of what your refrigerator's operating pressures should be.
The pressure should be equal to a saturated suction temperature of around 40*F. The pressure would differ depending on which refrigerant is used.
When turned off it is possible for gas bubbles of the refrigerant to mix with the liquid refrigerant in the pump. If the refrigerator is immediately turned back on the pump will turn this mixture to a froth that it is unable to pump and the refrigerator will not function. The pump motor can overheat and in some cases burnout or even catch fire. Waiting a few minutes before turning back on will allow the refrigerant bubbles to separate from the refrigerant liquid, preventing the pump from making a froth and allowing normal operation.
Adding freon to a refrigerator should be done by a professional technician. It involves accessing the refrigerant system, locating the correct port, and carefully injecting the freon. Attempting to do this without proper training can be dangerous and may damage the refrigerator.