Dear alls,
I would like to know how to determine the operation pressure (Low/High pressure) of a refrigeration cycle using R22 or R134a.
At my company, we control LP/HP of air-conditioner using R22 at: 4~4.2/18~20kgf/cm2. in near future, we will change R22 to R134s, so how to control the LP/HP of refrigeration cycle? Pls help me!