5) Damper and actuator must be kept clean, dry and protected from dirt, dust and other foreign materials prior to and after installation.
Common examples of such foreign materials include sawdust, mortar dust, drywall dust, fireproofing materials, plaster and paint
overspray.
6) Damper should be sufficiently covered as to prevent overspray if wall texturing or spray painting will be performed within 10 feet
(3m) of the damper. Excessive dirt or foreign material deposits on damper can cause excessive leakage and/or torque requirements to
exceed damper/actuator design.
7) Suitable access to dampers and actuators must be provided for damper inspection, maintenance and servicing. Where it is not
possible to achieve sufficient size access, it will be necessary to install a removable section of duct.
Electrical Guidelines:
All electrical and or pneumatic connections to damper actuators should be made in accordance with applicable codes,
ordinances and regulations.
SAFETY DANGER!
Electrical input may be needed for this equipment. This
work should be performed by a qualified electrician.
SAFETY CAUTION!
Verify power requirements before wiring actuator.
Alumavent is not responsible for any damage to, or
failure of the unit caused by incorrect field wiring.
Electrical and/or pneumatic connections to damper actuators
should be made in accordance with wiring and piping
diagrams developed in compliance with applicable codes,
ordinances and regulations.
Installation Instructions:
IMPORTANT: Failure to follow instructions will void all warranties.
1. INSTALLING MULTIPLE SECTION DAMPERS:
A damper assembly is not restricted to a maximum number of sections, but must not exceed the maximum section sizes shown below.
These dampers are intended to be self supporting only in their largest single section size. Multiple section damper assemblies may
require bracing to support the weight of the assembly and to hold against system pressure. Alumavent recommends appropriate
bracing to support the damper horizontally. Support ductwork in area of damper to prevent sagging due to damper weight.
Cycle the dampers by hand before installation to ensure freedom of movement.
Fasten damper sections together with #10 x ¾” (19mm) sheet metal screws, ¼ in.
(6mm) diameter nuts and bolts, tack or spot welds.
Attachments should be spaced a maximum of 6” (152mm) on centers and a
maximum of 3” (76mm) from corners. Attachments must be made on both front
face and back face (air entering and air exiting sides) of damper sections.
2. If more than three sections wide, unit ships as multiple section assemblies for assembly in the field. Assemblies are to be joined
together where the jackshaft extends past the frame 4 inches (102mm).
3. Duct opening or opening square should measure ¼” (6mm) larger than damper dimension and should be straight
and level.
4. If no holes are present in frame, drill appropriate size holes as necessary , depending on fastener type, on 6” (152mm) centers
and fasten frames together.
5. 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 of damper width for
strength. Dampers subjected to high velocities (2000 fpm [10.2 m/s]) may require more bracing. Note: Alumavent 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.
6. If damper actuator is to be mounted out of the air stream, the extension pin should extend approximately 4 inches (102mm)
beyond the frame. On jack shafted units, the jackshaft should extend through the jackshaft bearing assembly and approximately
6 inches (152mm) beyond the frame.
Page 2 of 4
Model
Max.
Multi-S
3100 &
48”w x
Unlimited
4000 &
48”w x 72
Unlimited
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