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176
SCS Series Manual —
P/N 15712:L 7/18/16
Ratings and Wiring Diagrams
HVAC Wiring Diagrams
5.5.3 EP Dampers
Figure 5.67 EP Damper Monitor - HVAC Switch Group Type 1
Figure 5.67 depicts an EP damper in an HVAC system with the capability of verifying the
CLOSED
state, switch group type 1. In the above
configuration, the EMS is supplying power to the pressure switch. When power is supplied, the pressure switch cuts the airflow to the
damper, closing the damper. When the damper completely closes, the damper closed limit switch is
CLOSED
, indicating that the damper is in
the
CLOSED
position. The VER
OFF⁄CL
MM monitors the
CLOSED
position of the damper closed limit switch. In this case the VER
OFF⁄CL
MM is
activated because the damper is
CLOSED
.
Figure 5.68 EP Damper Monitor - HVAC Switch Group Type 2
FMM-1
Airflow
PRESSURE
SWITCH
SMOKE
DAMPER
CLOSED
Power Source
SLC Loop
De
p-
h1
-f
s
-2
.wmf
Power
Return
VER
OFF⁄CL
MM
(activated)
N/O
COM
Limit Switch
for closed
position
ELR-47K
(use 3.9K listed ELR with FZM-1)
Pneumatic
Tubing
Energy
Management
System
*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.
Airflow
PRESSURE
SWITCH
SMOKE
DAMPER
CLOSED
Power Source
SLC Loop
De
p-
h2
-f
s
-2
.w
m
f
Power
Return
ELR-47K
(use 3.9K listed ELR with FZM-1)
Pneumatic
Tubing
Energy
Management
System
N/O
COM
Limit Switch
for open
position
VER
ON⁄OP
MM
(deactivated)
FMM-1
*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.