Since i have a 9′ garage ceiling plus two 7′ door openings, when installing the doors i opted as an 8′ track to raise the tracks closer to the ceiling plus out of the work area. This channel the door has to go increased a foot before it starts back, so traditional openers won’t work. For 20 yrs. I’ve been manually operating the door while now and then looking as an opener solution. The Liftmaster 3800 was the door answer, plus the “laser parking assist” the spotting answer. (3″ bumper to door plus 3″ grate to workbench, no more court tennis ball from the ceiling)
It’s been in service a week plus works flawlessly. The quality of the operating unit, cable tension monitor, plus hold firmly appears very high. The barrier unit, remote, plus light a little less so but seem adequate as the job.(few moving parts). The instructions are unclouded plus complete. And it comes with enough fasteners as most installations.
My installation was a little lengthly because i’m so picky. (ran a new outlet through the ceiling to get 4″ from the power unit, the square assist comes with 8′ of bell wire, needed 20′ – on the other hand through the ceiling, the tension monitor needed a spacer block, cut one to fit plus painted to match the finished plus textured wall, plus so on) the hold firmly merely needs a 1/2″ hole instead of 3/4″ if you can practice accurately. If i did it on the other hand i wouldn’t install the hold firmly. The door is insulated plus very heavy, i don’t think schwarzenegger could elevate it without the spring assist.
The merely puzzle i had ended increased being a programing issue of my own making. After setting the open travel limit to the top of the gap – 7′, the door would open but not close. The order troubleshooting section indicated the trouble was the cable tension monitor. I deliberation the not the puzzle since it’s curler was 2″ from the drum as recommended plus it was under tension with the door open plus closed. After 20 mins. Of reprogramming, checking connections plus rereading instructions, staring at the monitor when closing diagnosed the puzzle. When the door starts down there is a jerk which slackens the cable as a fraction of a second allowing the tension monitor to close if the door is close to the top but not fully open. Reprogramming to 8′ pulls the cable away from the barrier a couple of inches so during the jerk the monitor movement is not enough to close. An extra foot of door travel, but it works great!
Read more content at A significant solution as a modified door installation.
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