Thank you for visiting HVACmanuals.com. Whether its residential, commercial or mobile homes, we're your HVAC info source. Some of the info found in these manuals can be quite old. If you see any prices for parts, please ignore them as they are most likely obsolete. Most manuals contain parts lists and diagrams. The older the unit, the more obsolete parts you will encounter. In some cases the parts may still be available, but under a new part number. In other cases a generic part may be suitable for use. To find out please visit our parts store. Please note that specifications and illustrations found in these manuals are subject to change without notice and without incurring obligations. The manuals themselves are free, but getting you the information is not. In order to cover our costs of creating and maintaining this database of information, we do have to charge a fee for our service. You can either place your order online for an immediate download, or call us during business hours at 605-229-2627. Manuals can either be downloaded or copies sent to you in the mail. If you don't see the manual you are looking for, then e-mail us your request and we'll add it to our search list. Besides offering HVAC manuals, we are also creating and adding various types of HVAC videos. Don't know how a sequencer functions? Then check out this and other videos for a hands-on explanation.