Honeywell NOTIFIER SCS Series User Manual

SCS Series Manual — P/N 15712:L 7/18/16 153
HVAC Wiring Diagrams Ratings and Wiring Diagrams
Figure 5.44 Fan Control - HVAC Switch Group Type 5
Figure 5.44 depicts a fan in an HVAC system with the capability of
OFF control and verification of the OFF state, switch group type 5. In the
above configuration, the CON
OFF⁄CL
CM is deactivated. The CON
OFF⁄CL
CM controls a normally closed contactor that switches power to the
fan (the contactor is used when the power being switched is greater than 24 volts). When the CON
OFF⁄CL
CM is deactivated, the contactor is
closed, thus allowing the EMS to freely control the fan. In this case the EMS is OFF, so no power is being supplied to the fan. When no power
is supplied to the fan, the fan is
OFF and the sail switch is CLOSED, indicating no 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 activated because the fan is
OFF due to the EMS. When the CON
OFF⁄CL
CM is activated, the normally closed contactor opens, thus cutting any power to the fan that was
being supplied by the EMS.
Power Source
Listed contact
for Energy
Management
System
Service
Disconnect
Switch
ELR-47K
(use 3.9K listed ELR with FZM-1)
Listed
Sail
Switch
N/O
COM
N/C
Power Return
Listed
24 VDC
Power Source
VER
OFF/CL
MM
(activated)
fan-h5-fs-2.wmf
SLC Loop
FAN OFF
Energy Management System
FMM-1
FCM-1
CON
OFF/CL
CM
(deactivated)
Listed
24 VDC
Power Source
1b listed
contact
*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.

Honeywell NOTIFIER SCS Series Specifications

General

Brand	Honeywell
Model	NOTIFIER SCS Series
Category	Control Unit
Language	English