Mueller Roll-Up Door L250 - Manual (Page 10)

10 877-2-MUeLLeR
step 10: setting spRing initiaL tension
a Rotate door two revolutions, rotating the top of the
door towards the opening.
NOTE:
If your building design does not allow for door
rotation, lower the door curtain into the guides and
follow the instructions in Step13 to set door tension.
DO NOT CUT BANDS OR wRAPPINg UNTIl INSTRUCTED.
wARNINg DOOR IS UNDER
ExTREME TENSION!
B While firmly holding the door, at the bottom bar is
recommended, cut the tape and plastic wrap that holds
the door in a coil ~ exercise extreme caution; door is
now under spring tension and is dangerous.
C Direct the bottom of door curtain down into the entry
of the guides and bring the door curtain all the way to
the ground. Secure the door in the closed position with
the slide locks on the bottom bar.