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PRO-LOCK Operation
With the door in the closed position, the PRO-LOCK is de-energized and the door is locked in
the closed position. The latch-bolt is forward into the specially designed doorkeeper. When
the latch bolt center pin strikes the uniquely shaped post in the center of the keeper, it allows
the silver-plated electrical contacts within the PRO-LOCK to close. This action informs the
controller that the door is “closed and locked”, and the lift may start in response to a call.
When the elevator arrives at a floor, the PRO-LOCK is electrically energized to unlock the
door. The door remains unlocked until a pre-set time passes. The solenoid then
de-energizes to lock the door and complete the circuit to the controller.
PRO-LOCK Adjustment
The PRO-LOCK is factory installed in each PRO-DOOR and tested prior to shipping; however,
site adjustment may be required to the lock and keeper. The lock body is mounted in the
entrance assembly frame and is easily accessible from the shaft side. The keeper is mounted
on the face edge of the door and is also easily accessible. To ensure proper and consistent
operation of the PRO-LOCK, the installer should manually open and close the door and
observe the lock function. First, remove the lock cover from the shaft side by removing the
four attachment screws. The mechanical action of the lock can be accessed for manual
opening and closing of the lock mechanism as it is checked.
From the shaft side, manually press down on the top of the solenoid where it attaches to the
latch bolt lever yoke. This will retract the latch bolt into the lock body and unlock the door.
Slowly release the pressure on the latch bolt and let it return into the door keeper. If correctly
aligned, the movement of the latch bolt will be smooth and easy as it enters the keeper. If the
latch bolt operation appears to be stiff and does not cleanly enter the keeper, then some
adjustment of the keeper and/or lock assembly is needed. There is some movement of the
lock body on the slotted mounting holes provided. These can be seen when the cover is
removed. Access to the nuts holding the lock is best achieved with a “nut-driver”. There is
limited space within the lock; therefore, care must be used when inserting the nut driver.
Loosen the nuts. The lock body may now be moved slightly up and down, as well as in and
out, toward the keeper. Tighten the attachment nuts when completed. Make sure that wiring
does not get caught under the nuts.
If the alignment is still not proper, then note on the keeper that there are four screws on the
face. The two outside screws are for fastening the keeper mounting plate to the door edge.
The two inner screws are for adjusting the position of the keeper itself in relation to the latch
bolt in the lock. Loosen the two inner screws, just enough to allow the keeper to move. Do not
remove the inner screws. Note that the keeper may be adjusted 360
o
within the backplate
holder. If the screws are left “snug”, the keeper will stay in any position it is placed. By closing
the door again, the latch bolt can be released to move forward into the keeper. If it does not
enter cleanly, then assist the latch bolt’s entry into the keeper by pushing gently. The keeper
will adjust its position to align with the latch bolt. With the latch bolt in the keeper, try to open
the door. This pressure will assist the keeper to align itself. Manually open and close the latch
bolt and note that the operation is smooth (since the keeper is now aligned). Manually open
the latch bolt and tighten the keeper attachment screws.
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