Auto-Zone Control Systems Auto-Zone Basic Systems Installation & Operation (Version 02C) - Manual (Page 43)

Auto-Zone Basic Section 2
Installation and Wiring 2-13
Zone Dampers
The Zone Damper can also be either round or rectangular. The Round Zone Damper is
supplied with the damper actuator and Zone Controller factory mounted in a sheet metal
enclosure attached to a Round Air Damper assembly. This Round Zone Damper Package
is field-connected to the appropriate size round duct. Rectangular Zone Dampers
mounted directly in the rectangular ductwork using flanged connections field formed in
the rectangular ductwork. A Rectangular Zone Damper Kit is required to complete the
Rectangular Zone Damper package. The Rectangular Zone Damper Kit is supplied with
the Damper Actuator and Zone Controller factory-mounted in a sheet metal enclosure.
This assembly is then field-mounted over the Rectangular Damper shaft and secured to
the ductwork with sheet metal screws.
Figure 2-10: Round and Rectangular Zone Dampers
Up to two additional Rectangular Zone or Round Zone Dampers can be slaved together
when it is not practical to use a single damper. See Figure 2-14. Generally this is not re-
quired.
Round and Rectangular Zone dampers should be securely hung using either wire cradles
or metal strapping. While the dampers may be hung in any position, avoid sharp kinks in
flexible duct to prevent airflow restrictions. The Round Zone Dampers are insulated for
use in non-conditioned spaces to avoid sweating and to improve energy efficiency.
See Figure 2-2 for typical Round Zone Damper mounting locations. See Figure 2-12 for
Zone Controller wiring instructions.