Honeywell NOTIFIER SCS Series Operation And Installation Manual page 181

HVAC Wiring Diagrams
Energy
Management
System
1a listed
contactor
Pneumatic
Tubing
PRESSURE
SWITCH
Power
Return
Figure 5.73 depicts an EP damper in an HVAC system with the capability of
switch group type 7. In the above configuration, the CON
the pressure switch power line. When the CON
power is supplied to the pressure switch, which cuts the airflow to the damper, closing the damper. When the CON
the EMS is free to control the damper. The EMS is currently being overridden by the CON
When power is supplied to the pressure switch, the damper closes. When the damper completely closes, the damper closed limit switch is
and the damper open limit switch is
CLOSED
position of the damper closed limit switch and the VER
CLOSED
this case the VER
OFF⁄CL
SCS Series Manual — P/N 15712:L 7/18/16
Power Source
(use 3.9K listed ELR with FZM-1)
Airflow
SMOKE
DAMPER
CLOSED
Figure 5.73 EP Damper Control - HVAC Switch Group Type 7
CM is activated, the normally open contactor is closed. When the contactor closes,
OFF⁄CL
, indicating that the damper is in the
OPEN
MM is activated and the VER
Listed
24 VDC
Power Source
ELR-47K
Limit Switch
for open
position
N/O
COM
N/O
COM
Limit Switch
for closed
position
CLOSED
CM is activated. The CON
OFF⁄CL
MM monitors the
ON⁄OP
MM is deactivated because the damper is
ON⁄OP
Ratings and Wiring Diagrams
CON CM
OFF/CL
(activated)
FCM-1
VER MM
ON⁄OP
(deactivated)
FMM-1
VER MM
OFF⁄CL
(activated)
FMM-1
SLC Loop
control and verification of the
CM controls a normally open contactor for
OFF⁄CL
OFF⁄CL
CM.
OFF⁄CL
position. The VER
CLOSED
OFF⁄CL
position of the damper open limit switch. In
CLOSED
.
CLOSED
*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.
and state,
OPEN CLOSED
CM is deactivated,
MM monitors the
181