CaptiveAire BR Installation Manual

Part number 469420

Spreader Bar

Attachments

Multi section dampers

BR series Counterweight Adjustments

Installation, Operation, and Maintenance Instructions

This manual is the property of the owner, and is required for future maintenance. Please leave it with the owner
when the job is complete.

RECEIVING AND HANDLING

Upon receiving dampers, check for both obvious
and hidden damage. If damage is found, record all
necessary information on the bill of lading and file
a claim with the final carrier. Check to be sure that
all parts of the shipment, including accessories,
are accounted for.

Dampers must be kept dry and clean. Indoor
storage and protection from dirt, dust and the
weather is highly recommended. Do not store at
temperatures in excess of 100°F (37ºC).

SAFETY WARNING:

Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, injury or death. Read the installation,
operating, and maintenance instructions
thoroughly before installing or servicing this
equipment.

Due to continuing research, Greenheck reserves the right to change specifications without notice.

Pre-Installation Guidelines

The basic intent of a proper installation is to secure the damper into the opening in such a
manner as to prevent distortion and disruption of damper operation. The following items will
aid in completing the damper installation in a timely and effective manner.

1) Check the schedules for proper damper locations within the building. Visually inspect the
damper for damage.

2) Lift or handle damper using sleeve or frame. Do not lift damper using blades or linkage.
When handling multiple sections assemblies, use sufficient support to evenly lift at each
section mullion (see Figure 1). Do not drag, step on, apply excessive bending, twisting, or
racking.

3) Do not install screws in damper frame that will interfere with damper blades and prevent
them from opening and/or closing.

4) Damper must be installed into duct or opening square and free of twist or other misalignment. Damper must not be
squeezed or stretched into duct or opening. Out of square, racked, twisted or misaligned installations can cause excessive
leakage and/or prevent free operation.

Figure 1- supports for lifting a
multi-section damper

5) Damper must be kept clean, dry and protected from dirt, dust and other foreign materials prior to and after installation.
Examples of such foreign materials include but are not limited to:

a) Drywall/mortar dust
b) Firesafing materials
c) Wall texture
d) Paint overspray

Pre-Installation Guidelines continued....

Airflow

Adjustable
Counterweight
Assembly

Airflow

Adjustable
Counterweight
Assembly

Airflow

Adjustable
Counterweight
Assembly

6) Damper should be sufficiently covered as to prevent overspray if wall texturing or spray painting will be performed within 5
feet (1.50m) of the damper.

7) ACCESS: Suitable access must be provided for damper inspection and servicing. Where it is not possible to achieve
sufficient size access, it will be necessary to install a removable section of duct.

Counterweight Adjustment Procedure for BR Models

Dampers are shipped from the factory with frame flange location and flow direction as ordered. Location and size of both
counterbalances (blade edge, adjustable blade weights) are dependent upon flow direction and damper size. The damper must
be mounted square and plumb and must operate freely before any weight adjustments are performed. Contact Greenheck for
required modifications to change flow directions.

The following instructions should be followed when attempting to adjust counterweights on the BR series damper. Figure 1, 1A, &
1B shows the typical location of the adjustable counterweight assembly. Depending on the size of the damper and specified start
open pressure, the damper may have more than one counterweight assembly.

Figure 1
BR-1x series

Figure 1A
BR-3x series

Figure 1B
BR-4x series

Counterbalance Adjustment for BR-1X Series: Horizontal mount - Vertical Up Airflow

Figures 2 & 3 show the components of a typical adjustable counterweight assembly. BR-1X series
damper with a short height may have a different style blade and a trimmed mounting bracket. The
adjustment procedure is the same for both styles of blades.

The blade edge counterweight (Figure 3) is factory set and not intended for field adjustment. For vertical
up airflow, all adjustments should be made in the adjustable counterweight assembly.

When adjusting the counterbalance weights, you will need to adjust the full open pressure and start
open pressure. Both steps will need to be done.

Adjusting Full Open Pressure and Closing Force

Adjusting the closing force will also affect the full open pressure. Figure 3 shows the blade in the full
open position. Additional weights can be added to increase the closing force. Removal or trimming of
weights will reduce the closing force. After adjustment, verify blades close under no airflow from the full open position. Increase
the closing force if the blades fail to close.

Figure 2 Adjustable

counterweight assembly