The Deluge-Preaction Control Panel is a six-zone FACP for single and dual hazard deluge and preaction applications. The RP-2001 provides reliable fire detection, signalling and protection for commercial, industrial and institutional buildings requiring water-based releasing. The RP-2001 is compatible with System Sensor?s i3 detectors which are conventional smoke detectors that can transmit a maintenance trouble signal to the FACP indicating the need for cleaning and a supervisory ?freeze? signal when the ambient temperature falls below the detector rating of approximately 45øF (7.22øC).