This is the first in a series of columns addressing advanced basics in the understanding of the refrigeration cycle. All of these columns deal with refrigerant pressures, states, and conditions as ...

All refrigerated air conditioning systems use a substance known as refrigerant to effectively cool the interior of your business. R22 refrigerant, also known as HCFC-22, has been among the most ...

1. What exactly is the ban about? The initiative to phase out ozone-damaging chemicals known as hydrochlorofluorocarbons (HCFCs), including R22 refrigerant, began in 1987 with the Montreal Protocol.

Im working on a liebert split system. I found circuit # 1 to be flat on charge, This was due to a bad high pressure switch. I replace the bad switch and began charging the system up. I dumped 60lbs of ...

High operating pressures are necessary in order for CO2 refrigerant to pick up and give off heat. Head pressures can exceed 2,000 psi compared to 275 or 300 psi on a typical R134a system.