Remove dial from body of timer.
So now the timer is apart in 2 pieces.
Silver ON trippers and brass OFF trippers can be removed.
Place trippers in times you want timer to operate.
OFF trippers have to be at least 2 hours apart.
ON trippers have to be at least 2 hours apart
Minimum on-off function is one hour
Snap timer back together.
Tripper rotates around with dial.
When tripper contacts on-off lever, it physically moves lever like turning on light switch.
ON tripper moves lever one direction.
OFF tripper moves lever opposite direction.
Manual E-1020
http://www.intermatic.com/~/media/files/intermatic/products/instructions/timers/e1020%20-%20english.ashx