英语翻译Both the formulas above are only applicable to refrigera

英语翻译
Both the formulas above are only applicable to refrigerants with a molecular mass greater than 42kg/kmol.
The charge limits detailed in Table 1 require further commentary,as slight differences occurbetween the various standards.Specific to EN 378:2000,it is noted that within the informativeAnnex C,it is stated that A3 refrigerants should not be used for human comfort cooling or heatingin direct systems,open indirect systems and open indirect ventilated systems.This implies that the use of HCs for residential heat pump applications should be restricted to external systems with a secondary circuit using water or some other heat transfer fluid that can be safety circulated within the living area.However,it is permissible to conform to the standard if these informative requirements are neglected.(This is supported with the deletion of such a requirement within the draft prEN 378:2006).In terms of Table 1,only the columns headed “RHPAC” apply.