Chamberlain HD900D User Manual download pdf (Page 19)

To prevent possible SERIOUS INJURY or DEATH from a falling

garage door:

• If possible, use emergency release handle to disengage

trolley 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.

• NEVER use handle to pull door open or closed. If rope knot

becomes untied, you could fall.

Trolley

Release Arm

NOTICE

Emergency

Release Handle

Overhand

Knot

Trolley

INSTALLATION STEP 9

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 hole in the

release arm of the outer trolley.

• Adjust rope length so the handle is 6 feet (1.8 m) above the

floor. Ensure that the rope and handle clear the tops of all

vehicles to avoid entanglement. 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.

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Chamberlain HD900D User Manual Page 19