The Honeywell Q7800F-1004 Adapter Subbase is a replacement subbase for the RA890 control system, providing the mounting interface and electrical connections needed for RA890 installations. Identified by part number Q7800F-1004, this adapter subbase is designed to integrate RA890 units with compatible Honeywell equipment. Use this part when a dedicated adapter subbase is required for RA890 applications.
