Akuvox R20K / R20B In-Wall Mounting Kit

This kit turns an Akuvox R20K or R20B from a surface-mounted panel into a flush one. It holds a metal flush-mounting box that is built into the wall and a silver frame that borders the door phone, so only a thin edge shows in front of the wall. Akuvox uses one box and one guide for the R20K keypad model and the R20B button models (R20BX2 to R20BX5).

The box needs a recess of 207 × 89 × 40 mm (height × width × depth), with the cables already led into it. Akuvox's guide puts the top of that recess about 1.43 m above the ground. The box measures 224 mm high and 106 mm across its fixing tabs, and the frame 226 × 108 mm.

There are two ways to fix the box. The normal way uses four screws into wall anchors, with cement filling the gap around it, and holds up better against someone forcing the panel. The simple way sets the box in cement or a non-corrosive adhesive only. Either way, the R20K is screwed to the frame and the two are closed into the box with Torx screws.

Flush mounting is the neater choice for a villa gate pillar or an entrance wall that is still being plastered or clad, because nothing sticks out to be knocked. Akuvox advises sealing the gaps around the box against water and adding the R20K in-wall rain cover at a door that is open to the weather.