68-0139
40
W180 ZONE CONTROL SYSTEM
3. Applications in air ducts wider than 30 inches re-
quire multiple dampers and damper mounting tracks
(Fig. 48).
4. In multiple damper applications, do not weld damp-
ers together.
5. Do not weld dampers to air ducts or damper mount-
ing tracks.
6. When securing dampers with sheet metal screws,
refer to the installation instructions. Improper use of
sheet metal screws can damage damper blades and
the electric actuator.
7. Mount each damper for easy accessibility and servic-
ing after installation.
8. Dampers can be mounted in any position.
9. Properly support, tape, and insulate the dampers and
duct.
10. For retrofit applications or other special purposes,
use register dampers. Note that the design of the
register dampers prevents them from being posi-
tioned as precisely as the round type.
AOBD DAMPERS
Install AOBD dampers as follows:
1. Cut a 3 in. [76 mm] opening in one side of the air duct
at the location selected. Ensure the opening is cut fully to
the top and bottom air duct seams (Fig. 49).
2. Slide the AOBD into the air duct. Ensure the electric
actuator is mounted toward the top of the air duct.
3. For small air duct sizes (smaller than 20 x 8, 18 x 10,
16 x 12), secure the AOBD mounting plate to the air duct
with sheet metal screws provided.
4. For large air duct sizes (20 in. x 8 in., 18 in. x 10 in.,
16 in. x 12 in., and larger), secure the mounting plate to the
air duct with sheet metal screws provided. Then secure the
back of the AOBD as shown in Fig. 50. If the back of the
AOBD cannot be reached, install two mounting tracks as
shown in Fig. 40.
5. For air duct sizes longer than 30 inches, use mul-
tiple dampers and install mounting tracks in the air ducts
(Fig. 48).
6. Wire the AOBD as shown on the job drawings and
Fig. 19.
Fig. 48—Installing damper mounting tracks.
3 IN. [76 mm]
DUCT OPENING
1
2
DAMPER MOTOR ACTUATOR AND DRIVE LINKAGE
MUST BE TOWARD TOP OF DUCT.
USE 1/4 IN. [6 mm] SHEET METAL SCREWS PROVIDED.
1
M2274B
2
DAMPER MOUNTING TRACKS INSTALLED INTO TOP
AND BOTTOM OF AIR DUCT.
3
3
3 IN. [76 mm]
DUCT OPENING
Содержание W180
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