The WF-8800 Series and WF-9800 Series are fully compatible. WF-9800 Series units do not use “push-button” remote (manual mode override), since the converter operation modes are controlled automatically. WF-9865 and WF-9875 replacement units use a 20A UL-required power cord, whereas WF-8865 and WF-8875 used a 15A power cord. The receptacle on the distribution center might have to be …