Honeywell NOTIFIER SCS Series Operation And Installation Manual page 185

HVAC Wiring Diagrams
Power
Source
1b listed
contactor
Pneumatic
PRESSURE
Power
Return
Figure 5.77 depicts an EP damper in an HVAC system with the capability of
switch group type 11. In the above configuration, the CON
for the pressure switch power line. When the CON
power is cut from the pressure switch which allows airflow to open the damper. When the CON
control the damper. The EMS is currently being overridden by the CON
When power is cut from the pressure switch, the damper opens. When the damper completely opens, the damper open limit switch is
and the damper closed limit switch is
position of the damper open limit switch and the VER
case the VER MM is activated and the VER
ON⁄OP
SCS Series Manual — P/N 15712:L 7/18/16
CON
ON/OP
(activated)
COM
FRM-1
Airflow
Tubing
SMOKE
DAMPER
OPEN
SWITCH
(use 3.9K listed ELR with FZM-1)
Figure 5.77 EP Damper Control - HVAC Switch Group Type 11
, indicating that the damper is in the
OPEN
OFF⁄CL
Energy
Management
System
CM
Listed
N/O
24 VDC
Power Source
Limit Switch
for open
position
N/O
COM
N/O
COM
Limit Switch
for closed
position
ELR-47K
OPEN
CM is activated. The CON
ON⁄OP
CM is activated, the normally closed contactor is opened. When the contactor opens,
ON⁄OP
CM.
ON⁄OP
OPEN
MM monitors the
CLOSED
OFF⁄CL
MM is deactivated because the damper is
Ratings and 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.
VER MM
ON⁄OP
(activated)
FMM-1
VER MM
OFF⁄CL
(deactivated)
FMM-1
control and verification of the
CM controls a normally closed contactor
ON⁄OP
CM is deactivated, the EMS is free to
ON⁄OP
position. The VER MM monitors the
ON⁄OP
position of the damper closed limit switch. In this
.
OPEN
SLC Loop
and state,
OPEN CLOSED
CLOSED
CLOSED
185