For up-and-over doors, the APRB oscillating curved arm is mandatory for correct operation. 2. Mechanical Installation
The installation area must have sufficient clearance for both maintenance work and the manual release cord. For up-and-over doors, the APRB oscillating curved arm
Standard tools include a drill with masonry bits, screwdrivers, a spirit level, and protective goggles. For up-and-over doors
Pull the release lever to close the door, rest the mechanical stop against the drive carriage, and tighten it. a spirit level