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Chapter 2: Smoke control system hardware
The VM-1 smoke control
system
The VM-1 smoke control system is designated in this
manual as the SCS. The SCS consists of fans, dampers,
and other controls included in a typical VM-1 installation.
The VM-1 firefighter's smoke control station is
designated in this manual as the FSCS.
The SCS and the FSCS include an LCD and annunciator
strips, which are common to the VM-1 fire alarm
network. The FSCS may also include one of the
following graphic-based smoke control stations, which
are not a part of the VM-1 network:
•
FSCS-1 graphic annunciator smoke control station
•
FSCS-2 graphic annunciator smoke control station
•
FSCS-3 graphic annunciator smoke control station
•
FSCS-4 graphic annunciator smoke control station
Important:
Do not confuse the FSCS series graphic
annunciators or their model names with the FSCS
(firefighter's smoke control station).
The SCS and the FSCS are able to receive fire alarm
inputs and perform predetermined control functions.
Control functions include opening or closing doors,
dampers, and barriers. Other control functions include
shutting down or starting up fans to limit smoke spread
beyond the area of origin.
The SCS may be designed and installed as a stand-
alone system or integrated into the standard VM-1 fire
alarm network panels. NFPA 92A contains performance
criteria for the design of a smoke control system. The
integrity of a smoke control system can be accomplished
with smoke control components mounted in an VM-1 fire
alarm panel which also provides for occupant
notification, off-premises notification, and other NFPA 72
alarm system requirements not common to smoke
control functions.
To meet NFPA 92A design criteria, some jurisdictions
may require a panel for the SCS separate from the fire
alarm system. Confirmation of the ability to integrate
smoke control system components into the fire alarm
panel should be made with the owner and the authority
having jurisdiction (AHJ) prior to installation.
The FSCS graphic annunciator panel must indicate the
routing of fire alarm devices connected to the SCS as
required by NFPA 72. Operational power for dampers,
30
fans, and their related components are critical to the
operation of the smoke control system and should be on
building emergency power. NFPA 92A recommends
connection to emergency power for critical smoke
control components, while local the AHJ may require
emergency power for all system components.
Stand-alone
An VM-1 SCS designed and installed independent of
any fire alarm system requirements constitutes a stand-
alone smoke control system. This type of application is
most suitable for:
•
Applications where the SCS also serves as the
FSCS
•
Multiple building facilities or business campus
environments
•
Single zone systems like stairwells, elevator shafts,
and vertical shafts
The AHJ in some jurisdictions may require the SCS be
installed as a stand-alone fire protection component.
Integrated
The VM-1 SCS utilizes many components found in an
VM-1 fire alarm network and may even share the same
cabinet. The SCS may also share VM-1 components like
the CPU module. In such cases, comply with the
performance requirements of NFPA 92A in the
programming of shared components.
Firefighter smoke control station
The FSCS, where required, provides graphical
monitoring and manual control over the smoke control
system. The FSCS must have priority over all smoke
control system components shared with an HVAC
system. Where manual controls are also provided at
other building locations for management of smoke
control systems, the control mode selected from the
FSCS is to have override or bypass capability over other
building controls. Building controls such as Hand-Off-
Auto and Start/Stop switches located on fan motor
controllers, freeze detection devices, and duct smoke
detectors typically must be overridden or bypassed in
order to ensure the FSCS can be used to contain or
control smoke movement.
VM-1 Smoke Management Application Guide
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