6LIMIT SWITCH / FORCE ADJUSTMENT
WARNING
DOOR OPENS RAPIDLY.
Keep the path clear.
Position the ladder to the side of the power head so it is clear of all moving parts of the operator and door.
Always set the door operator to the minimum force required to operate the door.
NOTE: During operator cycling for force adjustment, the motor protector may shut off power to the operator. If this occurs, wait about 20 minutes to allow the motor protector to reset.
1.Adjusting limit switches.
•Locate force control knobs on power head (Fig.
–Gently turn both control knobs
•Verify emergency release lever in disengaged position.
•Verify “OPEN” limit switch at point where chain attaches to carriage slide (Fig.
•Manually close door.
•Move the “CLOSE” limit switch:
–Loosen set screw.
–Slide limit switch along rail to align front edge of switch with back edge of carriage (Fig.
–Gently tighten set screw.
•Press wall control button.
–Carriage slide will move toward power head and stop at the “OPEN” limit switch.
•Manually open door.
•Move the “OPEN” limit switch:
–Loosen set screw.
–Slide limit switch along rail to align front edge of switch with back edge of carriage (Fig.
–Gently tighten set screw.
–Manually close door.
•Place emergency release lever in engaged position.
•Press wall control button.
–Carriage slide will move toward door, engage with carriage and stop at “CLOSE” limit switch.
2.Adjusting “OPEN” force.
•Press wall control button.
–Door should open and stop at “OPEN” limit.
•Door does not fully open.
–Press wall control button.
–Door should close and stop at “CLOSE” limit.
–Turn “OPEN” force control knob slightly in clockwise direction.
–Press wall control button.
a. Continue step 2 until door opens completely.
3.Adjusting “CLOSE” force.
•Door is not fully closing.
–Cycle door, turning “CLOSE” force knob clockwise slightly each time until door reaches fully closed.
FOR
FIG. 7-1 Force adjustment screws.
FIG. 7-2 Place “Open” limit switch.
FIG. 7-3 Align “CLOSE” limit switch.
19
