Refrigerant Choices

Refrigerant Changeover Guidelines R-22 to R-407C

not leaking refrigerant to the atmosphere, and is operating properly, there is no technical reason to replace the HCFC refrigerant. In fact, changing the refrigerant may void the U.L. listing of the unit. However, once the decision has been made to make the change from R-22 to HFC R-407C, the fol-lowing guidelines are recommended. CONSIDERATIONS 1.

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