Honeywell NOTIFIER SCS Series Operation And Installation Manual page 188

Ratings and Wiring Diagrams
1b listed
contactor
1a listed
contactor
Pneumatic
Tubing
PRESSURE
SWITCH
Power
Return
Figure 5.80 depicts an EP damper in an HVAC system with the capability of
switch group type 14. In the above configuration, the CON
controls a normally closed contactor for the pressure switch power line. When the CON
is opened. When the contactor opens, power is cut from the pressure switch, which allows airflow to open the damper. When the
CON CM is deactivated, the EMS is free to control the damper. The EMS is currently being overridden by the CON
ON⁄OP
When power is cut from the pressure switch, the damper opens. When the damper completely opens, the damper open limit switch is
, indicating that the damper is in the
CLOSED
switch In this case the VER
188
Energy
Management
System
CON CM
ON/OP
(activated)
FCM-1
Power Source
(use 3.9K listed ELR with FZM-1)
Airflow
SMOKE
DAMPER
OPEN
Figure 5.80 EP Damper Control - HVAC Switch Group Type 14
position. The VER
OPEN
MM is activated because the damper is
ON⁄OP
Listed
24 VDC
Power Source
ELR-47K
Limit Switch
for open
position
N/O
COM
and
OPEN CLOSED
CM is activated and the CON
ON⁄OP
ON⁄OP
MM monitors the
ON⁄OP
.
OPEN
HVAC Wiring Diagrams
*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.
CON CM
OFF/CL
(deactivated)
FCM-1
VER MM
ON⁄OP
(activated)
FMM-1
SLC Loop
control and verification of the
CM is deactivated. The CON
OFF⁄CL
CM is activated, the normally closed contactor
ON⁄OP
position of the damper open limit
CLOSED
SCS Series Manual — P/N 15712:L 7/18/16
state,
OPEN
CM
ON⁄OP
CM.