What is the advantage of using Forane® 427A instead of R-407C for the retrofit of existing R-22 equipment?
When retrofitting existing R-22 equipment with Forane® 427A, an oil change is recommended (from mineral or alkylbenzene to polyolester) but thanks to Forane® 427A’s high tolerance to residual original oil, in most cases only one oil draining operation is necessary. There is no need for long and costly rinsing of the circuit. This is not the case with R-407C which can only tolerates traces of original oil in the POE lubricant. Forane® 427A is consequently a much simpler retrofit solution which additionally can, in most cases offer better performances than R-407C.
