Is it acceptable to mount the Orion-Tr and Phoenix Smart on a wall in upside-down orientation, i.e. such that the terminals face the ceiling and the wires run upwards?
I have a very tight installation spot which is only accessible from above and this orientation would greatly improve the accessibility of the terminals. Obviously, this way dust gets into the terminals more easily. Are there any other issues besides this obvious disadvantage? (For example, components on the internal PCB might get overheated as hot air does not flow the expected way.) However, I did not find a clear statement in the manuals which either explicitly approves or disapproves that orientation.