The OF19XS (surface) series shall be open in the back to allow for equipment clearance and wiring if needed.
Contractor shall observe all local and national electrical and building codes, and contractor shall provide a model S1 special screwdriver for future system maintenance.
Both types are used with a variety of apartment entry intercom and video intercom lobby panel modules, alphabetical directory modules, as well as specialty and annunciator modules.
The 19" height on the OF19X (flush) series is ideal for mounting alongside standard 19" high vertical mail boxes, if required. The OF19XS (surface) frames are open in the back to allow for equipment clearance and wiring as well, but can surface mount right on the wall without the need for a surface back box or housing. The OF19X (flush) series can be used by itself, or with the matching OH19X series flush back box/housing.
NOTE: All models are 19.0"H (483mm) Surface models are 2.25"D (58mm) Flush models are .88"D (23mm) off of finished wall surface. Sizes larger than OF194 are non-stocked, special-order items.