ok, just finished the driver for this, so it will be in the next build.
There is a trick to pairing it, this is due to the fact that we treat secondary controllers differently than standard zwave devices.
If you follow these steps you shouldn't have any issue pairing it.
1- factory reset it, hold the R button until the led turns on then off, follow this with a triple click.
2- open a window with the zwave information page
3- open a separate window and start device discovery
4- click the L button on the controller
5- refresh the zwave information page until you see the device show up with the discover button in the right column
6- click the discover button, the device name should now read "Remotec ZRC-90"
7- Exit the device discovery page, and the device should be ready to use.
I reset and paired the device three times using this method with the controller about 6' from the hub, no issues.