Install Emergency Disconnect System - Chamberlain LiftMaster MJ5011U Installation Manual

TYPICAL INSTALLATION

INSTALL EMERGENCY DISCONNECT SYSTEM

MODELS MH AND MHS ONLY
The MHS operator includes both a floor level disconnect sash
chain to disconnect the door from the door operator that allows
manual push up operation and an additional sash chain to engage
the manual chain hoist that also electrically disables the operator
controls.
Secure chain retaining bracket to wall 4 feet above the floor.
1
2
Wrap hand chain around hand chain wheel and through chain
guide.
3
Connect the ends of the hand chain.
Chain Retaining
Bracket
(with pad locking
provisions)
Floor
Hand Chain
Wheel
4'
2'
MODELS MJ AND MGJ ONLY
1
Secure keyhole bracket to wall 4 feet above the floor.
Keyhole Bracket
Hand
Chain
10
4' above
floor