I found this today, a recent install. Maybe we need to make the instructions a little more clear/simple. The installer has used a separate relay to take the fire interface and monitor the fire trip. They have then fed the switched power into the fuse module.
The whole point of the PP8FR is to provide a simple ALL IN ONE interface including fire trip relay and monitoring. The separate relay is NOT NEEDED. See extract below from install notes. I apologise for the IBone photo quality.
