Installation; When Installing; Planning The Installation; Selecting A Location - Honeywell TROL-A-TEMP AOBD Series Product Data

AUTOMATIC OPPOSED BLADE DAMPERS (AOBD)

INSTALLATION

When Installing this Product...
1. Read these instructions carefully. Failure to follow these
instructions can damage the product or cause a hazard-
ous condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced service techni-
cian.
4. After completing installation, use these instructions to
check out the product operation.

Planning the Installation

Selecting a Location

Select a location for the zone damper that is at least three feet
from the HVAC unit plenum in the air duct takeoff to the
respective zone. IODB dampers can be installed near air
registers.
The AOBD is a complete factory-assembled motorized
damper. It comes complete and ready for installation.
Selecting Damper Size
To ensure correct operation, be sure to select the correct
damper size for the air duct:
IMPORTANT
Be aware that damper sizes are built slightly smaller
than the listed dimensional sizes.
• If the damper is forced into an undersized air duct,
the excess pressure can jam the damper blades and
cause improper operation.
• When a small percentage of continuous flow is
desired in a zone, even when the damper blades are
closed, install a damper that is shorter than the air
duct width. Refer to Fig. 4.
1 DAMPER IS SLIGHTLY SMALLER THAN THE AIR DUCT SIZE. THIS
GAP ALLOWS A CONSTANT FLOW OF CONDITIONED AIR INTO
A ZONE WHEN DAMPER BLADES ARE CLOSED.
Fig. 4. Installing shorter dampers.
68-0246
Selecting Location with Humidifier Installed
• Recommended humidifiers are the evaporative type.
IMPORTANT
• Non-recommended humidifiers are the spray or
Installing the Dampers
IMPORTANT
— Install AOBD, AOBD-BM and IOBD dampers into a
— Use multiple dampers and damper mounting tracks.
— Do not force dampers into undersized air ducts.
— Do not weld dampers to the air ducts or damper
— In multiple damper applications, do not weld damp-
— When securing dampers with sheet metal screws,
— Be sure high limit setting is 200° F (93°C) or lower.
IMPORTANT
1
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Fig. 5. Securing back of damper to air duct.
4
Excessive lime or mineral deposits can accumulate
on damper blades and cause improper operation
when spray or atomizing type humidifiers are
installed in the furnace plenum or air supply duct with
the zone dampers.
atomizer type that is installed in the furnace plenum
or air supply duct.
squared air duct.
to install applications wider than 30 in. See Fig. 5.
Excess pressure can damage damper blades.
mounting tracks.
ers together.
refer to Installation Instructions. Incorrect use of
sheet metal screws can damage the damper blades
and the electric actuator.
Higher settings can damage the electric actuator.
When installing dampers in vertical air ducts, always
secure the front and back of the damper to the air
duct. See Fig. 5.
1
1
SECURE BACK OF DAMPER TO AIR DUCT USING
TWO 1/4 IN. (6 MM) SHEET METAL SCREWS.
M514