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SCS Series Manual —
P/N 15712:L 7/18/16
95
Building-Specific Operation and Programming Examples
The SCS⁄SCE
The CBE equation for the exhaust fan involves the creation of eight more reverse software zones (Z221, Z222, Z223, Z224, Z225, Z226,
Z227, and Z228), one for each floor, and programmed with a CBE of:
AND(Z20x LxM5 LxM8 LxM10 LxM13)
where x is one of the eight loops (1-8) that corresponds to the appropriate floor, then the CBE equation for L9M7 would be:
OR(Z221 Z222 Z223 Z224 Z225 Z226 Z227 Z228)
If any device in the building becomes ACTIVE as a result of a fire (except the manual pull stations) AND both the supply damper for that
floor is closed and the exhaust damper for that floor is open, one of the eight reverse zone CBE equations would become TRUE, which
would cause that reverse zone to become active. The activation of that zone would cause the equation L9M7 to be TRUE, which would cause
the control module to be ACTIVE. When the control module becomes active the exhaust fan will turn on.
Once CBE equations have been determined for all devices being used for smoke control, each control and monitor module must be mapped
to the appropriate EIA-485 protocol point. This process is very important because a control or monitor module is linked to its associated pro-
tocol point within a particular switch group for proper communication. The control module and monitor module information for the fans is
listed below:
Mapping in this fashion causes switch group 1 for the SCS at address 5 to control and monitor the fan for the stairtower. Similarly, Switch
group 2 would be for the elevator fan, switch group 3 would be for the supply fan, and switch group 4 would be for the exhaust fan. All of the
dampers must be mapped in the same way.
Once all mapping information is determined, there are only three more items to keep in mind before entering full point programming:
1.
All monitor modules used for smoke control must have the tracking option enabled. This is set by answering "Y" to the question:
IS@THE@TRACKING@OPTION@TO@BE@ENABLED@FOR@THIS@DEVICE?@(Y=YES,N=NO)@@@@@@@@@@@:
2.
All control modules used for smoke control must have the walk test option disabled. This is set by answering "N" to the question:
IS@THE@WALK@TEST@OPTION@TO@BE@ENABLED@FOR@THIS@DEVICE?@(Y=YES,N=NO)@@@@@@@@@@:
3.
All control modules used for smoke control must have the signal silence option enabled. This is set by answering "Y" to the question:
IS@THE@SIGNAL@SILENCE@OPTION@TO@BE@ENABLED@FOR@THIS@DEVICE?@(Y=YES,N=NO)@@@@@:
With all software type IDs determined, the CBE equations determined, the annunciator point mapping determined, and the features listed
above kept in mind, the designer can enter full point programming and program all control and monitor modules for smoke control. All this
information can be entered on Worksheet 3 prior to entering full point programming.
Weekly Testing.
The last item to be considered is a Control-By-Time (CBT) equation for weekly automatic testing of the smoke control sys-
tem. Dedicated systems require, per UL 864, weekly testing of the smoke control system. This can be accomplished automatically by the
FACP when programmed to do so using the time (TIM) operator. Two reverse zones can be used to provide testing intervals for the fans and
dampers.
loop # /
module #
SCS address/
point #
Stairtower fan
CON
ON⁄OP
CM
L9M1
A5P1
VER
ON⁄OP
MM
L9M2
A5P3
Elevator fan
CON
ON⁄OP
CM
L9M3
A5P5
VER
ON⁄OP
MM
L9M4
A5P7
Supply fan
CON
ON⁄OP
CM
L9M5
A5P9
VER
ON⁄OP
MM
L9M6
A5P11
Exhaust fan
CON
ON⁄OP
CM
L9M7
A5P13
VER
ON⁄OP
MM
L9M8
A5P15
NOTE:
The supply and exhaust fans cannot be ON when all of the associated dampers are CLOSED
Z199
TIM(SU 1.00 1.10)
Reverse software zone activated once a week for 10 minutes.
Z200
TIM(SU 1.05 1.10)
Reverse software zone activated once a week for 5 minutes.