Hired-Hand ICS-500 Environmental Controller - Manual (Page 12)

Integrated Control System 500 10
the fan will be running at minimum speed when temperature
equals 70 degrees.
Example:
Minimum 40 percent
Offset 5 degrees
Span 10 degrees
Target Temp 75 degrees
The variable speed fan will run at 40% when the inside temp
is 70 degrees (target - offset). The controller will increase fan
speed if inside temperature is rising up until 80 degrees
[(target - offset) + span] at which point the fan would be
running at 100 percent.
6.1.3. Wiring Connections
The following pages show the wiring connections from the System 500 board.