Greenheck IAQ-42 (467954) - Manual (Page 2)

Pre-Installation Guidelines
The basic intent of a proper installation is to secure the IAQ-42 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,
linkage, actuators, pick-ups, or jackshafting. When handling multiple sections
assemblies, use sufficient support to evenly lift at each section mullion (see
drawing). Do not drag, step on, apply excessive bending, twisting, or racking.
3) Do not install screws in damper frame that will interfere with unexposed blade
linkage and prevent damper blades 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 torque requirements to exceed damper/actuator
design.
5) Damper and actuator 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) Mortar dust
b) Drywall dust
c) Firesafing materials
d) Wall texture
e) Paint overspray
6) Damper should be sufficiently covered as to prevent overspray if wall texturing or spray painting will be
performed within 5 feet (1.5m) of the damper. Excessive dirt or foreign material deposits on damper can
cause excessive leakage and/or torque requirements and inaccurate airflow measurement to exceed
damper/actuator design.
7) ACCESS: Suitable access (actuators maintenance, etc.) 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.
Spreader Bar
Attachments
Multi section dampers
Installation-
Failure to follow instructions will void all warranties
1. Ensure the IAQ-42 damper is mounted with airflow straightener or louver mounted upstream of the damper.
2. Duct opening or opening square should measure 1/4 inch (6mm) larger than damper dimension and should
be straight and level.
3. If no holes are present in frame, drill 1/4 inch (6mm) diameter holes at 6 inch (52mm) centers and fasten
frames together with 1/4 inch (6mm) #20 (.03mm) bolts and nuts.
4. Use shims between damper frame and duct opening or opening space to prevent distortion of frame by
fasteners holding it in place. Brace at every horizontal mullion and vertically brace at every 8 feet (2.4m) of
damper width for strength. Dampers in high velocity (2000 fpm [610m per second]) may require more
bracing. Note: Greenheck dampers are specifically designed and engineered for structural integrity based on
model and conditions. Attachment, framing, mating flanges, and anchoring of damper assemblies into
openings, ductwork, or walls is the responsibility of the installer. Design calculations for these retaining and
supporting members should be determined by field engineers for that particular installation.
5. If damper actuator is to be mounted out of the airstream, the extension pin should extend approximately
6 inches (152mm) beyond the frame.
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