Manufacturer Part: 813
Measure the depth of the frame where you plan to mount the electric window opener.
If this frame depth is 0 mm-50 mm, then 813 – Mounting Set B will be needed in order to install the window opener.
Is the frame depth more than 50 mm, you do not need this set.
If the window frame, where the opener will be mounted, has an angled surface, then study the product, in order to decide if you are able to mount the opener in a suitable way.