Adjustments For Chain Drive Doors - Assa Abloy Albany RR1000 Owner's Manual

Adjustments for Chain Drive Doors

Drive Chain Tension Adjustment
The drive chain tension is preset from the factory. This setting should be checked af-
ter the door is cycled a few times. The drive chain is to be tensioned so the deflec-
tion of the slack side of the chain is equal to 2% of the distance between the shafts,
or about 3/8" (9.5 mm).
Installing the Inertia Brake
A safety inertia brake is supplied on all chain drive doors. This device engages and
locks the top drum from turning if the maximum operation speed is exceeded.
The brake must be installed on the bracket on the non-drive side of the header as-
sembly after the phase rotation has been verified. This must be installed with the
correct rotation direction. Installing backwards can cause the brake to engage.
The larger inertia brake shown below to the right might be reset dependent upon how
hard of an activation has taken place. If this brake has been engaged, consult the fol-
lowing instructions to properly inspect, repair or replace this brake. Repair parts may
be required.
6410T0030_EN01
If the Chain tension needs to be adjusted, loosen the (4)
bolts that attach the operator to the header assembly.
Using the threaded adjustment bolts located on the bottom
of the attachment bracket, either raise or lower the operator
to achieve the proper tension.
Retighten the (4) bolts that attach the operator to the head-
er assembly when finished.
The smaller inertia brake shown below on the left is a one-
time use only device. If it has been engaged it must be re-
placed (P/N 6622T001).
SMALL
LARGE
2014-08-01
ENGAGED
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