Subsequent alarms
BAS-APG001-EN
101
Subsequent alarms
(UL 864: 49.8)
When multiple input signals are received from more than one smoke zone
to initiate different automatic smoke-control sequence(s), the smoke-
control system shall continue automatic operation in the mode
determined by the first signal received.
Once a floor-based smoke alarm is activated, the system will react as if
that is the only alarm and will ignore all subsequent alarms, The supply,
return and stair shaft smoke alarms are still allowed to affect the supply,
return and stair shaft supply fans. Any reaction can be overridden at the
smoke control panel.
To ignore all subsequent floor alarms, the program fragment in Figure 53
on page 102 has been tested and works correctly. Once an alarm is
triggered by any floor-based smoke alarm, it will be the only smoke alarm
reaction allowed. When the first alarm is received, it triggers two events;
it writes the floor of the smoke alarm to analog variable 1 and sets a
binary variable to hold the output at that value. That binary variable is
held until all alarms are cleared by the fire smoke control system.
Table 28. Operational priority
Current state of system
Manual
override
Automatic
smoke alarm
System self-test
Panel lamp test
HVAC
(nondedicated)
Next
stat
e of syst
em
Manual override
N/A
Actuator is
overridden.
System self-test
ends.
Panel lamp test
can continue.
Actuator is
overridden.
Automatic
smoke alarm
Affects all non-
overridden
actuators.
N/A
System self-test
ends.
Panel lamp test
ends.
HVAC system
operation is
completely
suspended.
Only smoke
purge operation
is allowed.
System self-test
System self-test
is not allowed
to start.
System self-test
is not allowed
to start.
N/A
Allowed. No
change.
System self-test
not used.
Panel lamp test
Panel lamp test
is allowed to
start.
Panel lamp test
is not allowed
to start.
Panel lamp test
is allowed to
start.
N/A
Panel lamp test
is allowed to
start.
HVAC
(nondedicated)
HVAC system
running, but
overridden
actuator will be
affected.
HVAC opera-
tion is not
allowed to start.
System self-test
not used.
HVAC opera-
tion continues.
N/A
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: ......