Electric Garage Door Operators
by Mr Blessed 500
Electric garage door operators are for installation on overhead doors that slide up and clown on tracks. Most units are suitable for either sectional doors that glide in curved tracks, or one piece doors that glide on straight tracks.
Make certain which type of door you have before ordering an opening unit. Also measure the door's height and width, since these measurements can affect the size of the control unit you need. Check the distance between the highest arc of door travel and the garage ceiling. Most opening units require at least 2 inches clearance. Prior to installation, prepare the door by checking that all hardware is working properly. Oil the rollers and apply a liberal coat of grease to the tracks.
Be sure the door is balanced.
Make the existing door locks inoperable by jamming them in the open position, or hacksawing off the locking bar ends. The door operator unit could become seriously damaged if it strains to open a locked door. It is not necessary to be able to lock the door, since a door equipped with the automatic opener cannot be opened manually from outside the garage. In the event of electrical failure, however, the connecting arm can easily be disconnected from the carrier to permit manual
operation. One safety feature you should not fail to look for in the control unit you buy is an automatic return switch. This device causes the automatic reversal of the door when it encounters an obstruction during its downward slide.
Your door opener will require adjustment right after installation, to make it close more snugly or open wider. A clutch adjustment for the drive belt permits it to slip if the door's downward travel is obstructed. This slippage is an extra safety factor which occurs before the automatic reversal control takes over.
Opening adjustment the electric garage door operators(with door closed): Turn bottom nut to left if door opens too wide; to right if not wide enough. Closing adjustment (with door open): Turn upper nut left to close tighter; to right to close less.
Automatic reverse adjustment (so doers reverse with minimum pressure): Tighten nut nearest switch until spring has about Ye in. between cells. Test door. Loosening bottom spring nut will decrease required pressure.
Adjust clutch by using large wrench to tighten wheel nut so clutch is just tight enough to move door through its cycle but will slip if movement is obstructed. Then adjust wheel nut a quarter turn tighter. Thank you for reading this page on electric garage door operators.