Repair manuals for Lennox Commercial air conditioners are available for download on Lennox's website. The website offers different installation and service instructions for the company's product lines.
From the Lennox Commercial homepage, click the Tech Docs link on the top menu. Click Service Literature, and then click Air Conditioners under Service Manual. Check the drop-down list of air conditioners, and click the desired model number. All the service manuals are PDF files and can be viewed online or downloaded. A single service manual applies to several unit models under the same product series. The repair manuals are designed for the use of licensed professional installers or a service agency.