3840 Manual
Page 1
® GARAGE DOOR OPENER Model 3840 For Residential Use Only Com Details The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196 www.LiftMaster.com patible with See Page 30 for Owner's Manual ■ Please read this manual and the enclosed safety materials carefully! ■ Fasten the manual near ... CLOSE unless the Protector System® is connected and properly aligned. ■ Periodic checks of the opener are required to ensure safe operation. ■ The model number label is located under the light lens on the left side panel of your opener.
® GARAGE DOOR OPENER Model 3840 For Residential Use Only Com Details The Chamberlain Group, Inc. 845 Larch Avenue Elmhurst, Illinois 60126-1196 www.LiftMaster.com patible with See Page 30 for Owner's Manual ■ Please read this manual and the enclosed safety materials carefully! ■ Fasten the manual near ... CLOSE unless the Protector System® is connected and properly aligned. ■ Periodic checks of the opener are required to ensure safe operation. ■ The model number label is located under the light lens on the left side panel of your opener.
3840 Manual
Page 5
... Bolt 1/4"-20x1/2" (2) Wing Nut 1/4"-20 (2) Spacers (2) Rope Handle 5 contain the motor unit and all parts illustrated below . Hardware for installation Accessories will depend on the model purchased.
... Bolt 1/4"-20x1/2" (2) Wing Nut 1/4"-20 (2) Spacers (2) Rope Handle 5 contain the motor unit and all parts illustrated below . Hardware for installation Accessories will depend on the model purchased.
3840 Manual
Page 16
.... 5. Fasten with 6AB x 1-1/4" self-tapping screws Screw 6-32x1" (pre-wired) Drywall Anchors (drywall installation) or 6-32 x 1" machine screws (into drywall, drill 5/32" holes and use model 378LM wireless door control as the secondary door control. 1. DO NOT overtighten. • Replace cover by gently prying at the lower/middle portion of the...
.... 5. Fasten with 6AB x 1-1/4" self-tapping screws Screw 6-32x1" (pre-wired) Drywall Anchors (drywall installation) or 6-32 x 1" machine screws (into drywall, drill 5/32" holes and use model 378LM wireless door control as the secondary door control. 1. DO NOT overtighten. • Replace cover by gently prying at the lower/middle portion of the...
3840 Manual
Page 40
...by Seller are confirmed to Seller for the residence in which vary from defect in your local LIFTMASTER/CHAMBERLAIN dealer. SIMPLY DIAL OUR TOLL FREE NUMBER: 1-800-528-9131 www.liftmaster.com For professional installation, parts and service, contact your area. Failure to you. IN NO... OF THE PRODUCT COVERED HEREBY. WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE FOLLOWING INFORMATION: • PART NUMBER • PART NAME • MODEL NUMBER ADDRESS ORDERS TO: THE CHAMBERLAIN GROUP, INC. Technical Support Group 6050 S. Please include a brief description of the problem and a dated ...
...by Seller are confirmed to Seller for the residence in which vary from defect in your local LIFTMASTER/CHAMBERLAIN dealer. SIMPLY DIAL OUR TOLL FREE NUMBER: 1-800-528-9131 www.liftmaster.com For professional installation, parts and service, contact your area. Failure to you. IN NO... OF THE PRODUCT COVERED HEREBY. WHEN ORDERING REPAIR PARTS, ALWAYS GIVE THE FOLLOWING INFORMATION: • PART NUMBER • PART NAME • MODEL NUMBER ADDRESS ORDERS TO: THE CHAMBERLAIN GROUP, INC. Technical Support Group 6050 S. Please include a brief description of the problem and a dated ...