For commercial, industrial and institutional buildings that require releasing service, Fire-Lite's SIX-ZONE PANELS - for single and dual applications - are more than up to the task. The DDPMRP2001F is for deluge and pre-action applications, while the DDPMRP2002F handles the agent releasing applications. Both panels are compatible with System Sensor's i3 detectors, and transmit a maintenance trouble signal to the FACP when it needs cleaning. There's also a supervisory 'freeze' signal when the ambient temperature falls below the detector rating (approximately 45 F). Panels are also compatible with input devices like two-wire or four-wire smoke detectors, pull stations, water flow devices and tamper switches.