What is the suction and discharge pressure for R404A?
What should superheat be on 404A cooler?
A minimum superheat of 20°F is required at the compressor. Evaporator superheat for coolers (6-10 degrees) and freezers (4-8 degrees).
How do you charge a 404A cooler?
R-404A and R-507 refrigerant cylinders have a dip tube and liquid is charged with the cylinder upright. Break the final vacuum by charging liquid refrigerant into the receiver outlet valve access or the area of liquid line downstream from the receiver outlet.
What should the pressures be on a 404A walk in cooler?
The normal head pressure should be between 210-260 psi.2007-11-29