ATA GDO 1 Installation Manual

DO NOT ATTEMPT TO TURN POWER SWITCH ON YET.

a) Close the door. (manually)
b) Remove limits cover.
c) Set shuttle arm in engaged position.

Turn power switch on, press up/down button twice. Motor starts running and chain turning. Within seconds or so (depends on length of arm assembly), locater inside shuttle will engage chain index and the door will start to open. In that instance turn power switch off.

Important: Never operate the operator with the lock pin removed or severe damage may occur.

Now unscrew lock pin from limit control assembly and turn limit nut till you hear audible click in close door microswitch. Insert back lock pin, turn power switch on the press up/down button again. The operator will start opening the door from “near” closed position. When near to fully open position of the door turn power switch off. The operator and the door will stop moving.

Remove lock pin from limit control assembly and turn limit nut til you hear audible click in open door microswitch. Insert back lock pin and turn power switch on. Press up/down button to verify position of limits. If fine tuning of open and close position is required turn power off, remove lock pin and adjust limit nut in direction required. As a guide, one division of a turn on limit nut will change position of sliding shuttle by 8mm. Insert lock pin, turn on power and check final setting. If not fully satisfied with limit adjustment proceed with the fine tuning sequence again.

When fully satisfied with the setting of the door limits, tighten lock pin and cover limit assembly.