Description

Silent Knight EVS Emergency Voice System Installation Manual

The Silent Knight EVS Installation Manual covers the standalone Emergency Voice System product from Silent Knight — the voice evacuation amplifier and speaker circuit controller designed to integrate with Silent Knight fire detection panels for buildings requiring voice messaging during a fire event.

What the manual covers

• EVS cabinet mounting and AC mains wiring
• Battery sizing for voice evacuation duration
• Audio amplifier integration and sizing
• Speaker circuit wiring with supervised supervision
• Pre-recorded message playback configuration
• Microphone interface for live announcements
• Cause-and-effect integration with Silent Knight fire detection panels
• Multi-zone audio for floor-by-floor or area-specific evacuation messaging
• Compliance with NFPA 72 voice evacuation requirements
• Speech intelligibility (STIPA) considerations

Who should use this manual

This manual is for fire alarm and voice evacuation engineers integrating EVS with Silent Knight fire detection systems. Voice evacuation is a specialised discipline; the speaker circuit design directly affects whether evacuation messages will be intelligible during an actual emergency.

When EVS is required

NFPA 72 (and many local codes) require voice evacuation for high-occupancy buildings, multi-storey construction over a certain height, schools and healthcare facilities. The EVS provides the messaging function that simple sounder/horn notification cannot deliver.

Related Silent Knight manuals

For panels that integrate with the EVS, see the IntelliKnight 5820XL, 5820 and 6820 installation manuals (all available in EVS variants).

Related fire alarm training

For voice evacuation principles and integrated fire system design, see the BH Courses Fire Alarm Training Course. For SLC-specific commissioning competence, see the Notifier Fire Alarm Training programme.