Honeywell NOTIFIER SCS Series User Manual

SCS Series Manual — P/N 15712:L 7/18/16 119
Dedicated Smoke Control System Wiring Diagrams Ratings and Wiring Diagrams
ity could be obtained by connecting one normally open contactor and one normally closed contactor to the output of one control module. For
instance, if you are using one CON
OFF⁄CL
CM, connect the normally open contactor to the damper closed power and connect the normally
closed contactor to the damper open power. Both control modules are not necessary to switch the power to the damper: one is sufficient for a
dedicated system as long as two contactors are used.
Switch group type 8 would never be needed unless redundancy in
OFF and ON control were necessary. Type 8 is used for ON and OFF control
and verification of the ON state. When the CON
ON⁄OP
CM is deactivated, the
CON
OFF⁄CL
CM is activated, and vice versa. The CON
ON⁄OP
CM controls a normally open contactor which switches the damper open power
to the damper. The CON
OFF⁄CL
CM controls a normally open contactor which switches damper close power to the damper. When the
CON
ON⁄OP
CM is deactivated, the contactor is open, thus, cutting damper open power to the damper. When the CON
OFF⁄CL
CM is activated,
the contactor is closed, thus supplying power to the fan. The same capability could be obtained by connecting one normally open contactor
and one normally closed contactor to the output of one control module. For instance, if you are using one CON
OFF⁄CL
CM, connect the nor-
mally open contactor to the damper closed power and connect the normally closed contactor to the damper open power. Both control mod-
ules are not necessary to switch the power to the damper: one is sufficient for a dedicated system as long as two contactors are used.
Switch group type 9 would never be needed unless redundancy in
OFF and ON control were necessary. Type 9 is used for ON and OFF control
and verification of the
ON and OFF state. When the CON
ON⁄OP
CM is deactivated, the CON
OFF⁄CL
CM is activated, and vice versa. The
CON
ON⁄OP
CM controls a normally open contactor which switches the damper open power to the damper. The CON
OFF⁄CL
CM controls a
normally open contactor which switches damper close power to the damper. When the CON
ON⁄OP
CM is deactivated, the contactor is open,
thus cutting damper open power to the damper. When the CON
OFF⁄CL
CM is activated, the contactor is closed, thus supplying power to the
fan. The same capability could be obtained by connecting one normally open contactor and one normally closed contactor to the output of
one control module. For instance, if you are using one
CON
OFF⁄CL
CM, connect the normally open contactor to the damper closed power and connect the normally closed contactor to the damper
open power. Both control modules are not necessary to switch the power to the damper: one is sufficient for a dedicated system as long as
two contactors are used.
5.3.3 EP Dampers
The Electrical to Pressure (EP) damper uses airflow to operate the opening and closing of the damper. It operates such that when power is
applied to the pressure switch, airflow going to the damper is cut off and the damper closes. When no power is supplied to the pressure
switch, airflow is continuous and keeps the damper open.

Honeywell NOTIFIER SCS Series Specifications

General

Brand	Honeywell
Model	NOTIFIER SCS Series
Category	Control Unit
Language	English