User Guide
ZONE DAMPER WIRING
• Run 2-conductor thermostat wire for spring
return dampers (normally open or normally
closed).
• Run 3-conductor thermostat wire for power
open/power close dampers.
• Multiple dampers for the same zone can
be wired in parallel as shown in FIGURES
8 & 9.
• Wire the dampers to the zone panel:
– NC – This terminal is used to power
open a normally closed damper. For
power open and power close dampers
this terminal is used to power open the
damper.
– NO – This terminal is used to power close
a normally open damper. For power open
and power close dampers this terminal is
used to power close the damper.
– COM – This terminal provides a common
connection for the NC and NO terminals.
OPEN
CLOSE
COMMON
OPEN
CLOSE
COMMON
FIGURE 8 – NORMALLY OPEN / POWER CLOSE DAMPERS
FIGURE 9 – POWER OPEN / POWER CLOSE DAMPERS
90-2145
90-2154
8 English