pottorff CD-81 User manual

Industrial Damper
Installation, Operation, and Maintenance Manual
Sill Flashing
Storage
Dampers stored for any period of time before installation must be
protected from sunlight, dirt, and moisture. Keep all conduit entry plugs
and actuator access covers in place. Dampers should be stored on
pallets and not directly on the ground or on concrete. Dampers may be
stacked and stored horizontally with wood or equivalent spacers between
flanges to allow air circulation. Do not allow damper to be supported by
the blade(s) and never store with axles vertical. Dampers should be stored
in a dry, clean area; long term outdoor storage is not recommended and
could void the warranty. If the dampers are stored long term, please cycle
the damper with actuator once per year, a minimum of ten (10) open/
close cycles, to distribute grease in bearings and actuator. If the unit is
supplied with an actuator, refer to the actuator installation manual for
details on storage as well.
Installation
The goal of a proper installation is to secure the damper into the opening
or duct in a way that prevents distortion of the damper. The following
instructions will aid in completing the damper installation in a timely and
effective manner. If possible, to protect from damage, leave the damper
mounted on its skid/crate while moving to the installation location.
Remove the skid, crate, and packing materials carefully. Check the
opening or duct before installation to make sure it is free of obstructions
and is square, straight, and level. Ductwork must be properly supported
around damper to prevent sagging.
Figure 1
Lifting Lugs
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General Information
Pottorff industrial dampers are designed for minimal pressure drop when
in the open position and minimal air leakage when in the closed position.
They are designed for industrial applications to provide seamless, problem
free operation for the life of the product. Each damper is fully inspected
by qualified factory personnel before shipping. When properly installed
and maintained, the damper will be trouble free. Improper installation,
adjustment, modifications, service, or maintenance can lead to property
damage, injury, or death. Please read these instructions thoroughly before
installing or servicing the damper.
Safety
The responsibility for providing proper guarding for Pottorff supplied
equipment is that of the installer and user of the equipment as
requirements will vary from one installation to the next. Dampers with
powered actuators (electric or pneumatic) must be reviewed for safety
guarding of the moving parts on the damper and the actuator itself.
Where inlets and outlets are not ducted, screens are recommended.
Users and installers of this equipment should carefully read all
accompanying literature pertaining to safe operation for both the damper
as well as the actuator. Pottorff dampers are designed to provide a long,
trouble-free life, but do require maintenance and inspection as described
in this manual.
When maintenance is required, it is critical that these safety
precautions are followed:
1. Turn off/disconnect all electrical and/or pneumatic connections.
2. Lock out electric and/or pneumatics.
3. Block damper blade(s) to prevent movement.
4. Follow general safety precautions when removing heavy
components.
Failure to follow these precautions could result in personal injury
or damage to equipment.
Preparation
Locate all crates, boxes, cartons, etc. associated with the order. Remove
the damper from the packaging and inspect for damage. Confirm
quantities and sizing with the packing list and the submittal drawings
(if applicable). Also, if submittal drawings were included, review for
associated tag numbers, location, and hardware item callouts. Notify your
Pottorff representative immediately of any shortages or shipping damage.
Handling
The damper should only be lifted by the lifting holes provided in the frame
on the damper assembly (see Figure 1 below). Never lift a damper by
the blade(s), shaft, actuator, or any damper part. Lifting decisions must
be left to trained personnel. Fork lift/crane capacity must be checked for
sufficient lifting capacity. Care must be taken not to drop, drag, crush,
or apply excessive bending, twisting, racking or skewing loads upon the
damper frame, blade(s), linkage, or accessories. Painted dampers must
be handled with extra care as even a small chipped spot will break the
continuity of the coating and destroy its value as a protective covering of
the metal.
CD-81, CD-82, CD-83, CD-84, CD-85, CD-86, CD-91, CD-92, CD-93, CD-94

Industrial Damper
Installation, Operation, and Maintenance Manual
Bearings
Jamb Seal
Stop Seal
Blade Seal
1. Clean the dampers. Over time, dirt and
grime may collect on damper surfaces.
This can be a hindrance to airflow as
well as reduce the sealing efficiency of
the damper when closed. Be especially
careful in cleaning non-metallic blade
seals as they can be torn if abused. Mild
soap and water is the recommended
cleaning agent. Avoid abrasives and
solvents as these could degrade seals,
adhesives, oil on bearings, etc.
2. Check moving parts such as crank arms,
linkages, pins, blades, etc., to make sure
they move freely. While not required,
lubricating these components can prevent
possible rusting and unnecessary friction
increase. Use only a molybdenum spray
oil or similar graphite-based oil as regular
lubricating oil will attract dirt.
3. The bearings located on the blade axles
do not require lubrication.
4. If installed, inspect the blade seals and
stop seals for damage such as tears and
nicks. If damaged, replace as needed.
5. Check for worn shaft seals if applicable
and repair or replace as necessary.
6. Look for debris that may be interfering
with blade closure or effective sealing of
the blades and remove.
7. Check for loose hardware.
Refer to the actuator installation manual
for details on the actuator maintenance
requirements as well.
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If any NEMA electrical enclosure is supplied, use appropriate electrical
connections to maintain the NEMA rating. All wiring and fusing must
be in accordance with national electric code, local code, and project
specification requirements. If the unit is supplied with an actuator, refer to
the actuator installation manual for details on the actuator before startup
as well.
If pneumatic power is required, check all pneumatic connections. The
supplied pressures must match the pressures required. A qualified
technician must be used. Improper connections are hazardous and can
cause permanent damage to the pneumatic equipment. All plumbing
must be in accordance with national code, local code, and project
specification requirements. If the unit is supplied with an actuator, refer to
the actuator installation manual for details on the actuator before startup
as well.
Maintenance
Pottorff dampers are designed to be maintenance free under normal
operation. Dampers are to be installed square, level, and straight to
prevent binding during operation. The following damper maintenance is
suggested to help ensure proper operation and increase life expectancy
of the damper. The frequency of maintenance should be determined by
the severity of the application. Before performing maintenance ensure
that the damper has been locked out. The blades should also be securely
blocked to eliminate the potential for movement while maintaining.
Single Section Dampers
If damper is supplied without mounting holes, drill or punch as required.
Pottorff is not responsible for corrosion around field punched or drilled
holes on painted dampers. Unless specifically designed for vertical
blades, damper must be mounted with blade axis horizontal. Connect the
damper to the mounting location using the proper hardware. Attach the
damper to all connection points before tightening bolts. Confirm that the
damper is square, straight, and level, and free from bending, twisting, or
racking. Manually operate the damper to ensure that it operates freely.
Multi-Section Dampers
Follow instructions for single section dampers. Additionally, position
damper sections together in opening or duct. Align and match frame
markings or labels on adjacent sections. Fasten adjacent sections
together on front and back sides with screws or nuts and bolts. Shim
damper frame and opening or duct as required to prevent distortion of
frame. Multi-section dampers require bracing to support the weight of
the assembly and to hold against system pressure. Bracing should
support the damper horizontally, minimum 8 feet center-to-center. Large
vertical assemblies and high system pressure may require additional
bracing. All additional bracing and supports designed, supplied, and
installed by others.
Do's
1. DO use provided lifting lugs.
2. DO install bolts into all supplied mounting holes, then tighten in an
even and staggered pattern to evenly compress the flange gasket (if
using).
3. DO check that the mating flange is flat, square, and parallel to the
damper flange.
4. DO check that damper blade(s) and linkages do not interfere with the
mating opening or duct when the damper is cycled between open
and closed positions.
Don'ts
1. DO NOT lift damper by blade(s).
2. DO NOT use actuator, linkage, or axles as lifting point.
3. DO NOT pry flanges to mate flange holes with opening or duct
flange as the frame could become warped, twisted, bent, or pulled
out-of-round causing binding.
4. DO NOT tighten mounting bolts by working around damper.
Please follow these instructions carefully. Failure to do so may void the
warranty. If the unit is supplied with an actuator, refer to the actuator
installation manual for details on the actuator before installation as well.
If the actuators were factory installed some adjustment may be required
after installation.
Start Up
Precautions should be taken before startup of the damper. All additional
safety accessories should be installed before starting the damper to
ensure the safety of everyone around. Rotate the blade(s) by hand to
ensure free movement of all components. Remove any construction
debris, loose hardware, tools, etc., from inside the damper and opening
or duct.
If electrical power is required, check all electrical connections before
turning on power. The supplied voltage must match the voltage required.
A qualified electrician must be used. Improper connections are hazardous
and can cause permanent damage to the electrical equipment.

Industrial Damper
Installation, Operation, and Maintenance Manual
Troubleshooting
Manually operated damper blades not moving
1. Make sure the damper is free of obstructions.
2. Inspect damper for failed clevis pins, clevises, cams, link bars, or
crank arms and replace as necessary.
3. Check that the damper is installed correctly as any twist or bend in
the frame of the damper could prohibit smooth operation.
Actuator not responding
1. Electrical actuators: make sure the actuator is wired correctly and
receiving correct voltage. Refer to the actuator installation manual for
details on the actuator.
2. Pneumatic actuators: make sure the actuator is plumbed correctly
and receiving correct air pressure. Refer to the actuator installation
manual for details on the actuator.
3. If installed, check limit switches to make sure they are set correctly.
4. If equipped with a manual override, check operation of handwheel.
Confirm that clutch is engaging and/or disengaging correctly.
5. Power actuator independently by loosening bolts that secure the
actuator to the drive axle. Check to see that it operates properly and
that the amp draw is normal.
Actuator is operating, but the blade(s) fail to move or only move
limited distance.
1. Make sure the damper is free of obstructions.
2. Inspect damper for failed clevis pins, clevises, cams, link bars, or
crank arms and replace as necessary.
3. Check that the damper is installed correctly as any twist or bend in
the frame of the damper could prohibit smooth operation.
4. If installed, make sure that the limit switches in the actuator are set
correctly.
5. Make sure that end travel screws of the actuator are set correctly.
High noise level
1. Check the airflow as high velocity/flow can cause excessive noise.
Reduce flow through damper and check noise level.
2. Check the damper to make sure it is closed fully as partially open
dampers can cause excessive noise. If it is, re-adjust to fully close
damper.
Excessive leakage
1. Check the damper to make sure it is closed fully. If it is not, re-adjust
the actuator or drive linkage to fully close damper.
2. Inspect blade seals and stop seals for tears or nicks. If they are
damaged, replace damaged seals.
3. Check stops and perimeter frames for air passage. Caulk gaps with
silicone sealant as required. Do not apply caulk to the jamb seals
as these are flexible metal seals that have to be able to move to
function properly.
For more information and troubleshooting for actuators, refer to the
actuator installationmanual.
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Field Service
Installation, testing, inspecting, and commissioning the supplied
dampers in the field is not part of POTTORFF’s scope. POTTORFF is not
responsible for, and will not perform, the work for electrical connections
for field power, and will not perform work for connections for control
system equipment and components. If field service such as startup
assistance, troubleshooting, or repair are found to be an issue that
requires factory support or warranty claims, please contact your Pottorff
representative immediately.