16
5.2. CONNECTION OF A REVERSING EDGE DEVICE
IMPORTANT NOTE:
If the door is controlled by any device other than a constant pressure push-
button station, a reversing edge must be connected.
CAUTION
Connect reversing device appropriate to installation.
Connection and installation of a reversing edge device is provided with the edge (see also Figure 20). Any such
device that uses a normally open contact may be connected to terminals 3 and 6 on the low voltage terminal
block (Figure 18). When the door comes in contact with an object during downward travel, the circuit will cause
the motor to reverse the door to the fully open position. In addition, there is a cut-off limit switch (
advanced
close
limit switch) that will de-activate the reversing edge during the last few inches of the door's downward
travel.
Figure 20
Reversing Edge
5.3. CLUTCH ADJUSTMENT
1.
Adjustment of clutch is done by rotating the nut located at the end of the input shaft where the pulley
7" is located (Figure 21).
2.
Rotate the nut counter-clockwise until there is insufficient tension to permit clutch to drive door.
3.
Rotate the nut clockwise gradually until there is just enough tension on clutch to permit operator to move
door smoothly, but to allow clutch to slip if door is obstructed.
4.
When clutch is properly adjusted it should be possible to stop door by hand during travel.
WARNING
THE FRICTION CLUTCH IS DESIGNED TO PROTECT VEHICLES AND DOOR HARDWARE AGAINST
DAMAGE. IT IS NOT INTENDED TO PROTECT PEOPLE. ALL DOORS SERVING PERSONNEL ARE
TO BE FITTED WITH AN APPROPRIATE REVERSING DEVICE OR REVERSING EDGE TO PREVENT
INJURY OR DEATH
.
We strongly recommend the use of an automatic reversing device. Several types are available as
accessories. Consult your dealer for a recommendation
Reversing edge
location
