Lux thermostat manuals are available for download from the Lux website, as of 2015. The website includes free manuals for digital, programmable, mechanical or line voltage thermostats.
Start on the main page of the Lux products website, and select Support. Click on the link to Instruction Manuals to open a list of Lux products. Scroll through the chart to find your thermostat model, and click on the appropriate link in the far right column to download the instruction manual in English, Spanish or French. Depending on your browser settings, the PDF file of the manual either opens in a browser window or downloads to your computer.