Febco, Control Unit, models:

805Y	Operation And Maintenance
805YD	Operation And Maintenance Manual
825YA	Installation Instructions
825YD Series	Installation Operation & Maintenance
850 Series	Maintenance Manual
856	Maintenance Manual
860 Series	Installation Instructions
870V Series	Installation Instructions Manual
LF 860	Installation Instructions
LF860	Installation Instructions
MASTER 860 Series	Installation Instructions
Master Series	Installation Instructions Manual
PRV-2-U	Installation Instructions