Domestic refrigerators and window or through-the-wall air conditioners.
Liquid refrigerant charging of a system is normally accomplished in the liquid line. For example, when a system is out of refrigerant, liquid refrigerant can be charged into the king valve on the liquid line or receiver.
The side of the compressor that is normally charged is the low-pressure side. This is where the refrigerant enters the compressor after absorbing heat from the environment. Charging typically involves adding refrigerant to the system through the low-pressure service port, allowing the compressor to efficiently circulate the refrigerant throughout the system. Proper charging ensures optimal performance and efficiency of the HVAC system.
Your A/C needs to be charged.
Most new equipment is built for and charged with R410a, a refrigerant with much higher pressures than the R22 used for decades, R22 units are still available, dry charged however, you must fill them with R22 onsite. This is how new R22 compatible equipments being sold still.
Refrigerant is typically charged into the low-pressure side of the compressor to ensure the system operates correctly and efficiently. Charging refrigerant into the high-pressure side can lead to issues such as system damage, inefficient operation, or inadequate cooling.
1994 Mercury villagers come factory charged with R134a refrigerant. Vehicles built 1993 or prior were charged with R12 for note.
They are more difficult to use when charging refrigerant into a system and more calculations are necessary to determine the amount of refrigerant charged.
Automotive refrigerant is typically charged as a gas to ensure proper and efficient distribution throughout the air conditioning system. Charging as a gas allows for better control of the amount of refrigerant being used and helps prevent liquid slugging, which can damage the compressor.
They are more difficult to use when charging refrigerant into a system and more calculations are necessary to determine the amount of refrigerant charged.
Could be low or over charged with refrigerant.
Refrigerators are typically factory charged then sealed and there are no access ports to do what you are asking.
It came from the factory charged with R12 Freon. As this refrigerant is extremely expensive and hard to find, I suggest you convert it over to R134 Refrigerant.