Having massive problems at a local supermarket-does anyone know the correct refrigerant level for the following system:
low temp rack, screw compressers, Tyler-Mod.vrp140l-40.
r404a. problem is everyone I work with has a different answer-at the moment there are no balls floating in a vertical receiver, and the sight glass is clear, no flashing.
the evap coils in the freezers are frosting up heavily, hot gas defrost works, but not enough to cler the coils.
Does it sound like I'm too low on refrigerant?
be really grateful for anyone's help.