Input Configuration

Input 9-10

Supply temp sensor (optional) or External Occupancy/Alarm/Window contact (optional)

Input 11-12

Return temp sensor (optional)

Input 13-14

Input 'a' Local setpoint adjustment (10k pot with 1k series resistor) (optional)

Input 15-16

Input 'b' not used unless for External Fan Speed Selector from Sontay TT811/10K3a1 which also has built-in Return Temp Sensor (connect to terminals 11&12) and Setpoint Adjustment (connect to terminals 13&14)