Honeywell NOTIFIER SCS Series Operation And Installation Manual page 101

Building-Specific Operation and Programming Examples
The software type IDs for control and monitor modules are listed in Table 3.14. For this example, all fan control modules require the soft-
ware type IDs CMXC, all damper control modules require the software type ID CMXS, and all monitor modules require the software type
ID NOA.
Once the software type IDs have been determined, Control-By-Event (CBE) programming must be tackled. Before programming the FACP
with CBE, some thought must be given to a smoke control scheme.
• How will the smoke control system be activated?
• What devices will be activated first, second, etc.?
• What detectors will activate what parts of the smoke control system?
NOTE:
1. Duct detectors must not be used to activate the smoke control system.
2. Manual pull stations must not be used to activate zoned smoke control, but can be used to activate stairtower pressurization or elevator
hoistway protection.
For this example, we have six smoke detectors, a waterflow switch, and one manual pull station per floor, where each floor is designated as
a smoke control zone. Upon activation of a smoke detector or a waterflow switch, the system should pressurize the stairtower and elevator
hoistway, close the supply dampers on the fire floor, open the supply dampers on nonfire floors, open the exhaust dampers on the fire floor,
close the exhaust dampers on nonfire floors, close the recirculation damper, and turn on the supply and exhaust fans. Supply and exhaust fans
should not be turned on until all dampers required to be open have been opened and all dampers required to be closed have been closed. After
the first fire alarm, subsequent fire alarms will not initiate any further Control-By-Event functions for smoke control elements within the sys-
tem. Additional control after the first fire alarm requires manual intervention at the SCS⁄SCE.
Upon activation of a pull station, the system should only pressurize the stairtower and elevator hoistway. The zoned smoke control must not
be activated from manual pull stations because there is no guarantee that the pull station activated is on the fire floor.
Now that a general scheme has been worked out, we can begin determining CBE programming for the FACP.
The Control-By-Event equations for control modules and the Control-By-Event lists for monitor modules (if used) require quite a bit of
thought before being programmed. Control-By-Event equations provide the necessary control capabilities during automatic operation of the
smoke control station. For instance, if a fan is to be turned in response to a fire on a particular floor, the CBE equation for the control module
which controls that fan must reference all of the detectors on that floor. When one of the detectors is active as a result of a fire, the CBE equa-
tion becomes TRUE, activating the control module and turning on the fan. If the designer is unfamiliar with CBE programming, Appendix
A, Control-By-Event, should be read before proceeding.
NOTE: Some of the CBE equations in this example exceed the 14 byte limitation called out in Appendix A. They were intentionally left
intact to show the complete equation and to reduce complexity. Equations larger than 14 bytes must be broken into smaller groups of
equations as shown in Appendix A.
The first CBE equations to be determined are for the stairtower and elevator hoistway fans. The CBE equations for the stairtower and the ele-
vator hoistway are identical to those determined for the Dedicated System example. Refer to Section 2.5-1 for detailed information on how
these equations were determined.
The CBE equations for the first eight reverse software zones:
OR(LxD1 LxD2 LxD3 LxD4 LxD5 LxD6 LxM2)
where x is one of the eight loops (1-8) that corresponds to the appropriate floor.
The CBE equation for Z209:
OR(L1M1 L2M1 L3M1 L4M1 L5M1 L6M1 L7M1 L8M1)
The CBE equation for the CON
OR(Z201 Z202 Z203 Z204 Z205 Z206 Z207 Z208 Z209)
The CBE equation for the CON
OR(Z201 Z202 Z203 Z204 Z205 Z206 Z207 Z208 Z209)
If any device in the building becomes ACTIVE as a result of a fire, one of the eight CBE equations for the reverse zones would become
TRUE, which would cause that reverse zone to become ACTIVE. The activation of that zone would cause the equations for L9M1 and
L9M3 to be TRUE, which would cause the control modules to be ACTIVE. When the control modules become active the fans for the
stairtower and elevator hoistway will turn on.
SCS Series Manual — P/N 15712:L 7/18/16
CM of the stairtower fan:
ON⁄OP
CM of the elevator fan:
ON⁄OP
The SCS⁄SCE
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