INSTALLATION INSTRUCTIONS
WARNING
TO AVOID RISK OF ENTRAPMENT AND POSSIBLE DAMAGE TO THE DOOR AND OPERATOR THE LIMITS MUST BE ADJUSTED BEFORE APPLYING POWER TO THE OPERATOR.
SETTING THE LIMIT SWITCHES
1)With the cover open on the electrical enclosure, reference Figure 7 below. There are two (2) switches (A and B) mounted to the „V‟ bracket (F). The Close Limit switch (B) and the Open Limit switch (A) are mounted to the top side of the „V‟ bracket as shown. These switches are activated by the two limit nuts (E & C) on the threaded shaft which move laterally along the shaft as the operator opens and closes the door. When a limit nut nears the end of the shaft it activates a switch.
2)Depress the Limit Nut Retention Plate (D) so it disengages from the slots in the limit nuts and move the Limit nuts to the center of the threaded shaft.
3)Manually raise the door to a fully open position.
11
4)Depress the limit nut retaining Plate (D) so it disengages from the slots in the limit nuts. Turn the OPEN limit nut (E) on the shaft until it engages the Open Limit Switch (A). You will need to listen for an audible click. Release the retaining plate and be sure that it engages in slots of both limit nuts.
5)Manually lower the door to approx. 4 inches shy of the fully closed position and repeat Step #4 with the Close Limit nut
(C) and the Close Limit switch (B).
6)Manually move the door to a half open position. With the door in a mid position there will be time to stop the door if something or someone were in the door path when initially starting the door.
7)An additional limit adjustment may be necessary after the connection of the power supply in order to ensure the door stops at the proper Open and Close positions.
8)If needed, a fine adjustment of the Close Limit switch (B) or Open Limit switch (A) is possible by loosening the screws slightly that hold the switch to the V bracket and moving the switch within its mounting slots. Ensure to retighten the switch mounting screw. Moving the Reverse Cutout switch closer to the center of the box will increase the point where the reversing feature cuts out (to allow for irregularity in the floor, etc.). The reverse cutout point is factory adjusted to approx. 4 inches off the floor.
A
E
D
C
113116
B
A - OPEN LIMIT SWITCH
B - CLOSE LIMIT SWITCH C - CLOSE LIMIT NUT
D - LIMIT NUT RETAINING PLATE E - OPEN LIMIT NUT
F - “V” BRACKET
Figure 7
Limit Assembly
F
