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8
EMERGENCY DISCONNECT
MODEL MH
These operators are equipped with a manual hoist. An electrical
interlock will disable the electrical controls when the hoist is used.
Pull the disconnect chain (sash chain) to engage the hoist
mechanism. The disconnect chain may be locked in position
by slipping the end through the keyhole of the chain keeper
mounted on the wall.
Operate the door in the desired direction by pulling on one
side or the other of the continuous loop hoist chain.
The disconnect chain must be released from the chain keeper
before the door will operate again electrically.
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ELECTRICAL INTERLOCK WITH HOIST FOR MODELS MH AND MHS
Chain Keeper
(with pad locking provisions)
MODEL MHS
The MHS operator includes both a fl oor 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.
Refer to Model MH instructions for hoist operation.
Refer to Model MJ instructions for emergency operation.
When the manual chain hoist sash chain is engaged, electrical
operation will not function.
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2
Keyhole Bracket
EMERGENCY DISCONNECT FOR MODELS MJ
MODELS MJ AND MGJ
This operator has a fl oor level disconnect chain to disconnect the
door from the door operator.
To disengage, pull the chain and secure in the disengaged
position by slipping the end through the keyhole bracket
mounted on the wall. Or if emergency egress device is used,
pull handle to disengage operator from door.
The door may now be pushed up or pulled down manually.
Release the disconnect chain or reset the emergency egress
device to operate the door again electrically.
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To prevent possible SERIOUS INJURY from a moving chain:
• DISCONNECT electric power to the operator BEFORE manually
operating your door.
• If possible, use emergency disconnect 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 disconnect unless doorway is clear of
persons and obstructions.
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