This is the OEM bnoard for the following spas when no circulation pump is used
6600-287 / 6600-720 Sundance Spas Circuit Board
***680 Peyton Without A Circ. Pump (Rev 5.59 + Chip) Sweetwater 1-Pump, 680 1-Pump Series and 780 1-Pump Series From Sept. 2011 - Present
***680 Burlington Without A Circ. Pump (Rev 5.59 + Chip) From Sept. 2011 - March 2012
***680 Burlington Without A Circ. Pump (Rev 5.57 + Chip) From Sept. 2008 - Dec. 2011
***Palermo and Bahia (Rev. 5.57 + Chip) From 2000 - 2002
***680 Burlington (Rev. 5.57 + Chip) From 2006 - 2007
***680 Hartford/Hawthorne Non Circ. Pump Models (Rev.5.57 + Chip) From 2007 - Aug. 2011
Replaces Sundance 6600-087, 6600-046, 6600-287.
Revision 5.60+. For 2-Pump systems. This board does not operate a circulation pump. If the spa does have a circulation pump, then use 660-726
Jumper settings are as follows:
Jumper 1 - On - 15A, Off - 50A
Jumper 2 - On - 2 pumps, Off - 1 pump
Jumper 3 - Used along with Jumper 2
Jumper 4 - On - Celsius temp display, Off - Fahrenheit temp display
