11
2. Check to make sure the shutter door is properly balanced.
ALWAYS lubricate your shutter door, prior to checking the balance of the door.
The DoorLIFT will operate the shutter door provided a force of no more than 35Kg
to open or close the door. Ensure that the force required to lift the door is equal to
the force required to close the door.
•
If the door requires more force to open than it does to close, increase the
tension on the balancer.
•
If the door requires more force to close than it does to open, decrease the
tension on the balancer.
Additional info:
Time and the elements affect the tension on the spring that lifts the door. Over
time, the spring wire will corrode and loose effective wire diameter. The springs
themselves also get tired and loose their tensile strength. An average balancer on a
door will last approximately 15,000 to 25,000 cycles.
Adjusting and maintaining the proper door balance:
CAUTION—
work on doors and related parts can be dangerous. It is strongly recom-
mended that repair service work be preformed by persons who have successfully
completed appropriate training.
1.
For adjusting the spring, please consult your shutter manual for brand spe-
cific instructions.
DoorLIFT DL
-
6
Remote door system
Owner
’
s manual
