Get LiftMaster, Chamberlain and myQ support. A LiftMaster Internet Gateway (828LM) can be added if you need to control more than 10 devices using the MyQ app. Installation And Operating Instructions Manual: 841LM : Manual: Door Opening System. ... (Model 841LM)* MANUAL OPERATION 1. Up to 6 devices can be paired to garage door opener itself (controlled by garage door opener through 900MHz). LiftMaster 300 Windsor Drive Oak Brook, IL 60523 ... strict accordance with the instructions and warnings contained in this manual. The model 841LM 12V lock is only compatible with the following garage door opener model numbers: 8550WL, 8587WL, 8360WL, 8500W. Each LiftMaster and Chamberlain product has a unique number that can help you get support for your product faster and easier. Product Manual; Product Description. For most LiftMaster and Chamberlain garage door openers, you can find the product’s model number on a label or sticker on the outside of the product. The door should be fully closed if possible. liftmaster manuals are in pdf form so you can print the instructions of the product manual. Chamberlain Group has helpful how-to articles, troubleshooting resources, video instructions, product manuals and more. 2. E-Lock (compatible with LM3800W only) Even more security for your garage is achieved by using the E-lock, which can be mounted to your garage door side track. This powerful deadbolt lock makes it nearly impossible for intruders to gain entry to your garage. Add an extra layer of security to your garage door with the LiftMaster 841LM Automatic Garage Door Lock from North Shore Commercial Door. View & download of more than 2670 Chamberlain PDF user manuals, service manuals, operating guides. It is not interchangeable with the 24V lock used on residential jackshaft garage door opener models 3800, 3900 and 8500.

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