Below you will find instructions for the Intermatic DT620 and DT112k Astronomic Timers in both video format, as well as downloadable PDFs.
Configuring The Intermatic DT620 Astronomic Timer
Configure The Intermatic DT122K Astronomic Timer
You can also download the PDF instructions please use the following links
Intermatic DT620 timer instructions
Intermatic DT122K timer instructions