I would assume so. The spring acts like a counterbalance so there's less strain to raise the door.
A friend of mine showed me his door opener shortly before we built. The installer and my wife questioned me to be sure I wanted to spend a few hundred more. I'm glad I did.
Yes, you must still have a torsion spring. The door still has to be balanced/adjusted correctly, the motor just puts out enough power to raise the door. I seriously doubt the motor alone has the power/torque to lift a door without the spring assist. Also, when the power goes out, you want to be able to disconnect the motor and lift the door manually. I have insulated 9x9 doors on my shop and with them closed, deadbolt unlocked, I cannot lift the door without prybars or other mechanical means. They are HEAVY!
@BASIL I forgot to reply to this thread but there's a couple things to note...
-Check your jackshafts to make sure you have enough sticking out past the pully before you start installing. When I had my doors put in, the installers set the shafts an inch or two proud to the side the openers were going.
-Make sure your tracks have enough slope to them that the door falls on its own when the motor starts to unspool the shaft, if you don't and cannot adjust the tracks for more slope you may need assist springs installed to help get the door moving when closing from the full open position. These openers can unspool the cables when closing if the door doesn't get moving easily. Remember, your relying on the weight of the door to move it on its own when the shaft starts turning. Turning the shaft doesn't "pull" the door down, it releases spring tension and allows the door to fall under its own weight.
Garage Door Pusher Springs, helps to keep tension on the door cables Keeps door cables on the drums, FREE SHIPPING
www.garagedoorstuff.com
Here is a link to a thread on garage journal referencing the wall controller failure that I experienced. Like I said, not sure if the new ones have this issue or not. I THINK they updated them. My openers are 2015 models, my failure happened in 2019, no issues since.
Had a random issue where my jack shaft opener stopped working. Traced it back to the wall controller (LM888). Contacted LiftMaster and a new controller is on its way. Great customer service! Now, after doing a bit of reading on the cause. Lucky for me my controller stopped working and the...
www.garagejournal.com