if system is empty, u need to charge with correct amount of oil and refrigerant. the oil actually carries the refrigerant in the system if just recharging, buy the refrigerant that has oil already added, these are available at most auto stores
No. You will risk injuring yourself if the can of refrigerant blows up in your hand.
Before you try to charge the system, there are couple things you should know about,what type of system, the capacity, and the oil charge and type if you need to add oil.A under or over charge system can cause problems.
No. You absolutely cannot mix any refrigerants. You should completely recover all the old refrigerant and charge the system, with the new refrigerant, using the superheat method.
To charge a semi-hermetic compressor with refrigerant, you will need to connect a refrigerant cylinder to the system using proper hoses and gauges. Then, you will slowly introduce the refrigerant into the system while monitoring the system pressure and temperature. It is important to follow the manufacturer's guidelines and recommendations for the specific type of refrigerant and the correct amount to be added.
To charge a walk-in cooler with R404a refrigerant, you will need to connect a refrigerant cylinder to the system using a manifold gauge set. Open the cylinder valve and slowly add the necessary amount of refrigerant into the system according to the manufacturer's specifications. Be sure to monitor the system pressures and temperatures as you charge it to ensure that it is properly charged.
about 10% to 15% of system charge
The amount of refrigerant a unit contains depends on the size of the unit. That is the standard charge but the charge after the system is installed may be more or less. The system charge depends on the size of the refrigerant lines, the length of the lines, and the size of the unit.
Liquid receivers are used to store the liquid refrigerant after it leaves the condenser. It should be located below the condenser to enable natural flow. The receiver may be constructed either vertically or horizontally and should have sufficient capacity to hold the entire system's refrigerant charge. The design should be such that only liquid refrigerant leaves the receiver and enters the liquid line. by vishal mahnn
about 10% to 15% of system charge
about 10% to 15% of system charge
When the refrigerant saturation temperature increases to 36 degrees F.