Hired-Hand RS-300 Door - Manual (Page 21)

Part No. 4801-5157 Rev 11-05 RS-300 Door Page 21 of 30
8.5 Limit Switches
Warning!
TO AVOID THE DANGER OF POSSIBLE DAMAGE TO THE DOOR AND
OPERATOR, TRAVELLING CAMS MUST BE ADJUSTED TO THEIR
APPROXIMATE POSITIONS BEFORE MANUALLY OPERATING THE
DOOR OR BEFORE APPLYING POWER TO THE OPERATOR.
There are 4 limit switches. Two are used as end of travel, one is for radio-control or one-button operation and one is
for reversing devices. These switches are activated by the rotary cams traveling on a threaded shaft. Refer to
Figure 20, Limit Switches.
8.6 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 using the Manaras manual chain. (Refer to section 9.1,
Manual Operation of Door with Manaras Operator )
3. Pull the traveling cam retaining bracket on the Open Position cam side and rotate the Open Position cam. Refer
to Figure 21, Adjusting The Limit Cams.
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.
“Open Position” cam
“Close Position” cam
Figure 20 Limit Switches
Cam Retaining Plate
“Advanced Close”
Limit Switch “Close” Limit Switch
Limit Switches Lever
“Open” Limit Switch
“Advanced Open”
Limit Switch
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