LiftMaster 3800 3800 Manual - Page 8

INSTALLATION STEP 2 Attach the Emergency Release Rope and Handle • Thread one end of the rope through the hole in the top of the red handle so "NOTICE" reads right side up as shown. Secure with an overhand knot at least 1" (2.5 cm) from the end of the rope to prevent slipping. • Thread the other end of the rope through the loop in the emergency release cable. • Adjust rope length so the handle is no higher than 6' (1.83 m) above the floor. Secure with an overhand knot. NOTE: If it is necessary to cut the rope, heat seal the cut end with a match or lighter to prevent unraveling. INSTALLATION STEP 3 Install Power Door Lock The lock is used to prevent the garage door from being manually opened once the door is fully closed. 1. Select a door roller to mount the lock above. Check for clearance. If possible select a roller on the same side of the door as the motor unit. The second roller up from the bottom is ideal in most installations. 2. Ensure rail surface is clean and adhere lock template with bottom edge just above the highest point on the roller (Figure 1). 3. Drill holes as marked on the template. 4. Fasten power door lock to the outside of the garage door track with hardware provided. 5. Run bell wire up wall to motor unit. Use insulated staples to secure wire in several places. 6. Plug connector into the motor unit (Figure 2). NOTE: Lock must be mounted within 10' of the power head. WARNING To prevent possible SERIOUS INJURY or DEATH from a CAUTION falling garage door: • If possible, use emergency release handle to disengage door ONLY when garage door is CLOSED. Weak or broken springs or unbalanced door could result in an open door falling rapidly and/or unexpectedly. • NEVER use emergency release handle unless garage doorway is clear of persons and obstructions. 132A2505 132A2505 Motor Unit Emergency Release Cable Overhand Knot Rope Emergency NOTICE Release Handle Overhand Knot Figure 1 TOP DRILL 5/16" DRILL 3/4" DRILL 5/16" Approx. 3" (7.6 cm) Figure 2 Garage Door Track Lock Template TOP DRILL 5/16" DRILL 3/4" DRILL 5/16" Roller HARDWARE SHOWN ACTUAL SIZE Lock Screw 1/4-20 x 1/2" (2) Staples 8