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Smoke control sequence
commands
7
Open outside air dampers for
adjacent zone
8
Close exhaust dampers of
adjacent zone systems
9
Start smoke zone return fan
10
Start adjacent zone supply fan
11
Reset the static pressure control
(if present) to maximum allowable
value for all systems under active
VM-1 SCS control
12
Monitor air flow and damper
position at panel
Single zone smoke control with
common outside air and exhaust air
Table 14 lists the sequence for a single zone smoke
control system with common outside air and exhaust
ducts.
Table 14: Single zone smoke control with common outside air and
exhaust ducts
Smoke control sequence
commands
1
AUTO OFF
2
Stop the smoke zone HVAC
supply fan (Where fire is detected)
3
Close smoke zone supply air
dampers
4
Stop designated adjacent zone
HVAC return fans
5
Close exhaust dampers of
adjacent zone systems
6
Stop supply and return fans of all
remote zone systems on common
outside air and exhaust ducts
7
Open (fully) common outside air
damper
8
Open (fully) common exhaust
damper
9
Close return air dampers for the
smoke zone
10
Close return air dampers for
adjacent zones
VM-1 Smoke Management Application Guide
Objective
Develop positive pressure
and keep out smoke
Develop positive pressure
Maintain negative pressure
Maintain positive pressure
Monitoring and control
Confirms system operation
Objective
Override HVAC system
Reduce pressure
development
Isolate smoke zone
Limit smoke spread
Limit smoke spread
Prevent smoke extension
Allow for fresh air entry
Allow for exhausting smoke
Prevent smoke back-flow
and create negative
pressure
Keep out smoke
Chapter 3: Smoke control system programming
Smoke control sequence
commands
11
Open smoke zone exhaust
damper
12
Turn on smoke zone return air fan
13
Open supply air dampers on
adjacent zones
14
Turn on adjacent zone supply fans
15
Turn on common system supply
fan (if not previously activated)
16
Turn on common system exhaust
fan (if not previously activated)
17
Reset the static pressure control
(if present) to maximum allowable
value for all systems under active
VM-1 SCS control
18
Monitor air flow and damper
position at panel
Central system smoke control
Table 15 lists the sequence for a central system smoke
control system.
Table 15: Central system smoke control
Smoke control sequence
commands
1
AUTO OFF
2
Open central system outside
exhaust air dampers
3
Open central system outside
supply air dampers
4
Close central system return air
dampers
5
Close smoke zone supply air
damper
6
Open smoke zone exhaust air
damper
7
Close adjacent zone exhaust air
dampers
8
Open fully adjacent zone supply
air dampers
Objective
Vent smoke, create
negative pressure
Vent smoke, create
negative pressure in fire
area
Provide fresh air
Create positive pressure in
zone
Create positive pressure in
zone
Vent smoke, create
negative pressure in fire
area
Monitoring and control
Confirms system operation
Objective
Overrides HVAC controls
Reduce pressure
development in smoke zone
Limit smoke spread
Limit smoke spread
Isolate smoke development
Reduce pressure
development
Prepare zones for
pressurization and limit
smoke spread
Prepare zones for
pressurization and limit
smoke spread
47
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