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max 8 m
ADJUSTING THE INCORPORATED LIMIT SWITCHES
This operation applies only to MEC 200 LB with incorporated limit switches, for doors whose width is 8 meters maximum.
First operation. Make sure the chain is well stretched by adjusting the tensioner in order to ensure the entire system will work all
right (it is obvious that the door is to be fastened to the chain).
Make also sure that proper ground door stops be provided in open and closed door positions.
The microswitches inside the limit switch box are factory pre-connected to the dedicated terminals; these are to be further connected
to the respectively dedicated terminals in the main control box, following the diagram included in it.
Operations to carry on next:
• by the position adjusting screws, move the two microswitches close to the box inner walls;
• with MEC 200 LB overridden (see operations for manual release) move the door by hand up to the middle of the travel;
• with MEC 200 LB overridden (see operations for manual release) move the contact shaft halfway the travel;
• manually move the door to the closed position on to the door stop or very close to it;
• by a screwdriver onto the dedicated adjusting screw, drive the closing microswitch to touch the contact shaft;
• do the same with the door in the open position on to the open stop or very close to it;
• re-engage MEC 200 LB after having moved the door to the middle of the travel distance (see manual releasing section).
Pic. 8
Pic. 7
En
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7
IMPORTANT: after having overridden the motor and manually operated the door to open and close, the position
of the limit switch contact shaft does no longer correspend to the actual position of the door.
Therefore, it is important that, after the door has been disengaged from the motor , RE-ENGAGING of the door
to MEC 200 LB is made in the very same position on which disengaging occurred.
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Terminal block for the
electrical connections
to the control box
Limit switch
electric cable
inlet
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Contact shaft
Microswitch 1
adjuster
Microswitch 2
adjuster
Microswitch1
NC contact
Microswitch 2
NC contact
MEC 200 LB
Chain-drive electromechanical operator
for sectional, folding and industrial doors
GREASE
