Chapter 1 Smoke control overview
16
BAS-APG001-EN
Design considerations for smoke
control
Two occurrences will hinder smoke control:
•
Plugholing
•
Smoke feedback
Smoke control systems should be designed to address the problems that
are caused by plugholing and smoke feedback.
Plugholing
Plugholing occurs when an exhaust fan pulls fresh air into the smoke
exhaust (Figure 10). Plugholing decreases the smoke exhaust and
increases the smoke layer depth. It has the potential of exposing
occupants to smoke.
The maximum flow of smoke (Q
max
) exhausted without plugholing
depends on the depth of the smoke layer and the temperature of the
smoke. If the required total smoke exhaust is greater than Q
max
,
additional exhaust vents will eliminate plugholing. The distance between
vents must be great enough that the air and smoke flow near one vent
does not affect the air and smoke flow near another vent.
Figure 10: Sample plugholing
Summary of Contents for Engineered Smoke Control System
Page 1: ...BAS APG001 EN Applications Guide Engineered Smoke Control System for TRACER SUMMIT ...
Page 2: ......
Page 6: ......
Page 12: ...Contents vi BAS APG001 EN ...
Page 30: ...Chapter 1 Smoke control overview 18 BAS APG001 EN ...
Page 48: ...Chapter 3 Installation diagrams 36 BAS APG001 EN Figure 14 Tracer MP581 to FSCS wiring ...
Page 50: ...Chapter 3 Installation diagrams 38 BAS APG001 EN Figure 15 Tracer MP581 to FACP wiring ...
Page 57: ...Wiring high voltage ac power BAS APG001 EN 45 Figure 19 AC wiring ...
Page 59: ...EMI RFI considerations BAS APG001 EN 47 Figure 20 Checking the earth ground ...
Page 75: ...EMI RFI considerations BAS APG001 EN 63 Figure 31 Checking the earth ground ...
Page 96: ...Chapter 5 Installing the Tracer MP581 programmable controller 84 BAS APG001 EN ...
Page 110: ...Chapter 6 Installing the EX2 expansion module 98 BAS APG001 EN ...
Page 123: ...End process verification BAS APG001 EN 111 Figure 61 ast actuator fail checkb 3 13 06 ...
Page 132: ...Chapter 7 Programming 120 BAS APG001 EN ...
Page 151: ...Understanding bindings BAS APG001 EN 139 Figure 79 Mixed subnet node and group bindings ...
Page 152: ...Chapter 8 Network variable bindings 140 BAS APG001 EN ...
Page 154: ...Appendix A References 142 BAS APG001 EN ...
Page 155: ......