Cosco SLC, SLR, SLD manual Electrical Connection and Adjustments, Limit NUT Adjustments

SLR • SLC • SLD OPERATOR INSTALLATION GUIDE

ELECTRICAL CONNECTION AND ADJUSTMENTS

Power supply must be of correct voltage and phase.

Always disconnect power from operator before servicing.

Keep clear of gate during operation.

All OSCO gate operators are supplied with a power disconnect switch to turn on and off the power supply available to the operator. Incoming power should be brought into the operator and connected to the labeled pigtails in the disconnect box following wiring specifications on page 4. A wiring connections print can be found on the inside cover of the operator.

Proper thermal protection is supplied with the operator. The motor contains a thermal overload protector to protect from overheat- ing the motor due to overload or high-frequency operation. This overload will automatically reset after the motor cools down.

LIMIT NUT ADJUSTMENTS

The limit nuts are not preset at the factory and must be adjusted for the length of the gate the operator is installed on. The limit switches are activated by two threaded nylon rotary limit nuts which are attached to a threaded shaft and driven by chain and sprockets from the main drive shaft. Remove the cardboard filler before attempting to adjust the limit nuts.

With the gate connected to the gate operator in a mid-travel position, and the power disconnect switch turned OFF, disconnect the operator by using the manual disconnect lever. Instructions for the manual disconnect can be found in the individual operator owner’s guides. Once the operator has been disconnected, manually move the gate by hand to within a foot of its fully open position (the foot of distance is necessary to allow for coasting of the operator after the limit switch is tripped).

Once the gate is in this position, adjust the open limit nut until it activates the limit switch for open, LSO-1. Press down on the detent plate and rotate the nut along the threaded shaft. Refer to the illustration below for additional details.

Once the open limit nut is set, repeat the above process for the close direction nut and the LSC-1limit switch.

After finishing the initial limit nut adjustments, reposition the gate to approximately its center of travel. Re-engage the operator and turn the power disconnect ON. Stand clear of any moving parts and press the OPEN button on the three-button station. If the gate begins to close instead of open, press the STOP button immediately. Find the dip switch block on the main control board and switch the hand of operation (dip switch #4, see page 9) and try to open the gate again. Observe the gate as it runs through a complete cycle in both directions, and adjust your limits again if necessary. Fine levels of adjustment can also be achieved by adjusting a few teeth on the nut at a time. If the gate stops in midtravel, the open or close current sensor adjustment or the maximum run timer may need adjustment (see page 11).

POWER DISCONNECT BOX	LIMIT BOX
(115VAC VERSION SHOWN)

- 8 - 10-04-6