NFS2-640 UL Listing Document — P/N 52741LD:H9 5/19/2022 21
– Responding to a CO event:
1. To silence only the panel sounder:
Press the ACKNOWLEDGE/SCROLL DISPLAY key to silence the panel sounder. The fire panel will send an Acknowledge message to the remote
annunciators, history buffer, installed printers, and CRT-2s.
To silence the panel sounder and any activated outputs that are programmed as silenceable:
Press the SIGNAL SILENCE key. The SIGNALS SILENCED LED will light steady. The control panel sends a Signal Silenced message to the
remote annunciators, history buffer, installed printers, and CRT-2s. Check the alarm message for the location and type of event.
2. Correct the condition that activated the CO alarm.
3. Press the
SYSTEM RESET key to return the control panel to normal operation.
A “System Normal” message is sent to the LCD display, remote annunciators, history buffer, installed printers, and CRT-2s.
• Emergency Signaling, Type SM
• Smoke Control, Smoke Movement
All fires produce smoke, and the movement of smoke will follow the same pattern as the overall air movement within a building, often flowing
away from the fire to unwanted areas. A smoke control system must be able to inhibit the flow of smoke within a building. Elements that cause
the movement of smoke include one or more of the following:
– Stack effect
– Buoyancy of the smoke
– Expansion
–Wind
– Elevator piston effect
– the HVAC system
Principles of Smoke Control
The smoke control system uses a building’s ventilation system to exhaust the fire floor and pressurize surrounding floors. The three major
considerations for smoke control are:
– Smoke containment
– Purging
– Door-opening forces
HVAC Equipment
For smoke control applications, HVAC systems must have the following capabilities:
– Supply outside air to a space
– Return air from a space
– Exhaust air from a space to the outside
The SCS/SCE
– The SCS-8 Smoke Control Station and the SCE-8 Smoke Control Expander can be used in conjunction with this panel to provide smoke
control capabilities.
– The SCS-8LSmoke Control Lamp Driver and the optional SCE-8L are used with the smoke control system to provide graphic annunciation.
– Dedicated/Non-dedicated Smoke Control System Wiring Diagrams
ALARM: CO INTENSIVE CARE UNIT
EASTERN WING Z004 03:19P 041512 2M147
Status Banner
CO Alarm indicator
Custom descriptor for
this device location
Device address
Time and date of trouble
Zone
Extended 12 character
custom label
Figure 24 Sample CO Alarm Message
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