11
3.4 ADJUSTMENT OF LIMIT SWITCHES
WARNING
NEVER PLACE HANDS OR TOOLS INSIDE OPERATOR OR NEAR DRIVE MECHANISM UNLESS POWER
IS OFF.
1. Open the cover of the electrical enclosure.
2. Manually raise the door to a nearly opened position.
3. Pull the travelling cam retaining bracket on the
Open Position cam
side and rotate the
Open Position
cam
(Figure 12).
Note:
Turning the cam towards the center of the shaft increases door travel.
Turning the cam towards the switch decreases door travel.
4. Manually rotate the
Open Position
cam until the lever activates the
Open
limit switch sufficiently so as to hear
the switch click.
5. Release and engage the retaining bracket. Make sure that the bracket engages in the slots
of both limit
cams after each adjustment.
6. Manually lower the door to a nearly closed position and repeat steps 3 through 5 with the Close Position cam.
7. Upon completion of all wiring connections, repeat steps 2 through 6 using the "Stop" button for adjustments
of limit switches to their final, exact positions.
Figure 12
Adjusting the limit cams
3.5 MINIMUM SUGGESTED WIRE SIZE FOR CONTROL CIRCUIT
The control circuit operates at 24 VAC. Due to the resistance in the wire used to carry the control circuit voltage, it
is important to use the appropriate wire size with respect to the distance between the operator and the push-
button station.
The chart (TABLE 2) indicating the minimum recommended wire size with respect to the total distance
between the operator and the push-button station. DO NOT exceed the maximum distance. If there are
several push-button stations in series you must ADD all these distances before selecting the appropriate wire
gauge for your operator.
If the wire gauge is not suitable for the distance, problems in operation will be encountered such as chattering
relays and contactor, premature wear of the contacts and possible tripping of the motor's thermal protection.
If a greater distance is required, a long distance interface module is suggested (consult factory).
When large gauge wire is used, a separate junction box will be needed for operator power connection (not
supplied).
Pull the traveling cam retaining bracket
on desired side
to adjust cam position
Summary of Contents for Opera-GH
Page 18: ...18 6 Opera GH exploded view...
Page 29: ...29 7 10 Single phase ECB wiring diagram...
Page 30: ...30 7 11 3 Phase ECB wiring diagram...
Page 42: ...42 9 9 Single phase Hardwired wiring diagram...
Page 43: ...43 9 10 3 phase Hardwired wiring 10 3 phase Hardwired wiring diagram...
Page 45: ...45 NOTES...
Page 46: ...46 NOTES...
Page 47: ...47 NOTES...
Page 48: ...48 BOOK146 REV 1 2007 02 19...
