Tom from SWISCO responded:
March 26, 2019
It's not common for this operator to be mounted vertically, but I've seen it done once or twice. If it's otherwise identical to the 39-140 then I see no reason why it couldn't work in the same capacity. Just understand that this isn't the intended function of this operator; whoever installed yours originally evidently thought it would work, but I cannot be sure if you will run into any complications. |