Owner's Manual

The solenoid operated brake may require occasional
adjustment. Adjustment is necessary if door tends to drift
downward after reaching the open limit. Follow the
instructions below and Figure 19.
(1) Loosen shoe adjusting screw and bottom bracket arm
of solenoid.
(2) Move tab until drum has a slight drag.
(3) Reverse drag slightly from tab and tighten shoe
adjustment screw.
BRAKE ADJUSTMENT
Following installation, the operator MUST be tested and
respond correctly to all controls as specified on the wiring
diagram. Keep personnel and equipment clear of the area
beneath the door when performing the tests. When testing the
3-button wall station, first observe that each button operates the
door in the direction indicated and that the STOP button
performs that function. With the door stopped at its full open
position, the OPEN button should be inoperative. This should
be verified and, likewise, the CLOSE button should be
inoperative with the door fully closed.
Certain operator control circuits use only a single button or a
two button control station and may be designed to function
differently than the more common three-button circuit
described above. Test the controls in accordance with the
description of operation as indicated on the wiring diagram and
on page 14, Wiring Types.
Observe the door when traveling in each direction for
smoothness of operation. Test the setting of the clutch by
restraining the door by hand. The clutch should slip. Re-check
the limit settings. The door should close tightly at the floor
without excessive impact. Likewise, it should fully clear the
door opening without the carrier striking the stops on the rail.
The T series operators are equipped with a reversing edge
circuit and to conform with code, need to be connected to a
pneumatic or foam door edge or photoelectric device. To test an
edge for proper reversal, place an object beneath the leading
edge of the door. To test a photoelectric device for proper
reversal, start the door down and obstruct the beam. The door
should instantly reverse when it comes into contact with the
object provided the height of the object exceeds the cut out
TESTING
point built into the close limit switch (approx. four (4) inches).
If the operator is equipped with other means of control, such as
additional 3 button stations or radio controls, each of these should
be tested separately for proper operation.
Test the manual disconnect with the door in the fully closed
position. The door arm should freely fall away from the carrier
when the release chain is pulled. If it is difficult to release and the
door arm appears to be under compression, reset the CLOSE limit
slightly to reduce the travel of the carrier in the close direction.
ALWAYS DISCONNECT POWER TO
THE OPERATOR BEFORE SERVICING,
CONNECTING ACCESSORY DEVICES
OR MAKING ADJUSTMENTS.
WARNING
CAUTION
DO NOT STAND UNDER DOOR
TO TEST REVERSING EDGE
USE A CORRUGATED BOX
OR OTHER SIMILAR OBJECT
Figure 19
107103
OPERATION & ADJUSTMENT INSTRUCTIONS
16