This is retrofit with no instructions!
The NRS103WH is intended to use three wires to the master station. This is a bit confusing because the NRS103 in fact has 4 screw terminals green, red, black and white. The master station also has these same 4 terminals. I found that by just using the green, red and black wires to the appropriate screw terminals the unit will work as described. Even if you change the jumper setting on the master station to work as 4 wire, the NRS103WH will not work properly. Don't hook up the white wire and it should work fine.
Date published: 2016-07-17