EWC Controls BMPlus 3000 Technical Bulletin page 8

DAMPER WIRING AND CONFIGURATION DAMPER WIRING AND CONFIGURATION
Note: All zone dampers default to the "OPEN"
position after a purge delay has occurred.
Dampers also default "OPEN" during
changeover & short cycle delays, and when
all zone demands are satisfied, and no
signals are detected from the thermostats.
REFERENCE THESE DIAGRAMS PRIOR TO
INSTALLATION AND POWER WIRING. DOING SO WILL
SAVE TIME AND LABOR LATER ON.
ZONE MODULE DAMPER
MOTOR TERMINAL BLOCK
DESIGNATION & FUNCTION
Terminal M6 24vac to Close a damper(s)
Terminal M4 24vac to Open a damper(s)
Terminal M2
Constant 24vac HOT
Terminal M1 Common 24vac
Figure 13
All Models ND & URD Damper Wiring
PC 6
PO 4
COM 1
Figure 14
All Models RSD Damper Wiring
A Spring Open Damper is wired to M1 & M6
A Spring Close Damper is wired to M1 & M4
Figure 15
8
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362
ZONE
MOTOR
M6
M4
M2
M1
.
ZONE
MOTOR
M6
M4
M2
M1
ZONE
MOTOR
M6
M4
M2
M1
All Models ESR Damper Wiring
MA-ESR
NC NO C M M
Auxilary
SPDT
End Switch
Dry Contacts
Rated for
24vac only
A Spring Open Damper is wired to M1 & M6
A Spring Close Damper is wired to M1 & M4
Figure 16
Multiple ND and/or URD
Damper Wiring on a Single Zone
PC 6
PO 4
COM 1
PC 6
PO 4
COM 1
PC 6
PO 4
COM 1
TO THE NEXT MOTOR ACTUATOR
Figure 17
On all these dampers and most older style
dampers, including competitor's dampers,
always wire up number to number or designation
to designation.
Do not overload your transformer!
Contact EWC Controls Technical Support when you
are on the job site for assistance with damper wiring.
Have a Multi-Meter, pocket screw driver and wire
snips on hand.
E-Mail- info@ewccontrols.com
ZONE
MOTOR
Either one
M6
Not both
{
M4
M2
M1
.
ZONE
MOTOR
M6
M4
M2
M1
NOTE: Do not connect more
than 4 motor actuators in a
series configuration. That will
decrease the chances of poor
electrical connections and
voltage drop issues.