108 SCS Series Manual — P/N 15712:L 7/18/16
Ratings and Wiring Diagrams Air Flow Switches
5.2 Air Flow Switches
Any air flow switch used in a smoke control or HVAC system only requires UL listing for HVAC applications. Air flow verification may be
implemented either with an air flow switch or a pressure differential switch. The manufacturers listed below provide products that have been
identified for use with the SCS⁄SCE. The manufacturers, part numbers and device types are as follows:
5.3 Dedicated Smoke Control System Wiring Diagrams
5.3.1 Fans
Figure 5.1 Fan Control, Dedicated System - FSCS Switch Group Type 1
Figure 5.1 depicts a fan in a dedicated system with the capability of
OFF control and verification of the OFF state, switch group type 1. In the
above configuration, the CON
OFF⁄CL
CM is deactivated. The CON
OFF⁄CL
CM controls a normally closed contact which switches power to the
fan (the contact is used when the power being switched is greater than 24 volts). When the CON
OFF⁄CL
CM is deactivated, the contact is
closed, thus supplying power to the fan. When power is supplied to the fan, the fan is
ON and the sail switch is OPEN, indicating airflow in the
duct. The VER
OFF⁄CL
MM monitors the CLOSED position of the sail switch, which would indicate when the fan is OFF. In this case the VER-
OFF⁄CL
MM is deactivated because the fan is ON and the sail switch is OPEN.
Manufacturer Model Type
Johnson Controls F62AA Air Flow
Dayton 2E462 Pressure Differential
Antunes Controls SMV, SMD, SML, JPD-2 Pressure Differential
Power Source
1a listed
contactor
Service
Disconnect
Switch
ELR-47K
(use 3.9K listed ELR with FZM-1)
N/O
COM
N/C
Power Return
Listed
24 VDC
Power
Source
FMM-1
FCM-1
CON
OFF/CL
CM
(deactivated)
VER
OFF/CL
MM
(deactivated)
FAN-Df1-fs-2.wmf
SLC Loop
FAN ON
Listed Sail
Switch
*If the SLC device
does not match the
one in this figure,
refer to the SLC
manual appendix,
which contains
wiring conversion
charts for type V
and type H
modules.
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