Chamberlain Merlin MJ3800 Installation And Operating Instructions 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 25mm (1") 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 1.8m (6') above the floor. Secure with an
overhand knot.
NOTE: If it is necessary to cut the rope, heat seal the
cut end to prevent unraveling.
INSTALLATION STEP 3
Install powered door lock
The lock is used to prevent the 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 opener. The
second roller up from the bottom is ideal in most
installations.
2.Ensure the door track 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 powered door lock to the outside of the
door track with hardware provided.
5.Run bell wire up wall to opener. Use insulated
staples to secure wire in several places.
6.Plug connector into the opener (Figure 2).
NOTE: Lock must be mounted within 3m (10') of the
power head.
HARDWARE SHOWN ACTUAL SIZE
Lock Screw
1/4-20 x 1/2" (2)
Staples
To prevent possible SERIOUS INJURY or DEATH
from a falling door:
• If possible, use emergency release handle to
disengage door ONLY when 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
the doorway is clear of persons and
obstructions.
Opener
Emergency
Release Cable
Overhand
Knot
Warning Label
Emergency
Release Handle
Rope
Overhand
Knot
TOP
DRILL 8mm
DRILL 19mm
Approx. 7.6cm
DRILL 8mm
(3")
Figure 1
Figure 2
8
WARNING
TOP
DRILL 5/16"
DRILL 3/4"
DRILL 5/16"
Roller
Garage
Door Track
Lock Template