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Page 1.080
3/16 IOM-FDIMP
OPERATION AND MAINTENANCE PROCEDURES
CURTAIN TYPE FIRE DAMPERS
MODEL SERIES: (D)0100, 0200, 0300 AND (D)0500
Page 1 of 2
Dampers are an essential part of the fire protection system in a building. The NFPA recommends that fire dampers be
tested periodically to verify the operational abilities of each installed damper. See NFPA 80,
Standard for Fire Doors and
Other Opening Protectives
, for Operational Test and Periodic Inspection and Testing details.
CAUTION:
Some curtain fire dampers utilize high torque springs under tension; ensure HVAC fans are turned off. Testing spring
assisted fire dampers under airflow conditions is
NOT RECOMMENDED
and may severely damage or destroy ductwork.
Use protective eyewear or safety glasses. Keep hands out of the blade path, as this can cause serious injury. Keep any
hard objects or tools out of the blade path as they can damage the blades when closing.
Periodic Inspection, Testing and Maintenance
Consult your local building code to verify whether there is a required maintenance and testing schedule. Most local
jurisdictions reference NFPA 80 for Fire Dampers. Per NFPA 80, each damper should be tested and inspected 1 year after
installation and then every 4 years, except for hospitals, where the frequency is every 6 years.
1. Remove any obstructions, dirt, rust, corrosion, or other observed conditions that could impede proper damper operation.
2. Check closure springs (if applicable). If damaged or defective, repair or replace.
3a. Non-Spring Assisted Dampers
Bend metal straps away from damper frame so that they are straight. Remove
fusible link and allow the blade package to drop and close naturally by the force
of gravity. See Detail 1. Use caution, keeping fingers, hands, arms and tools out
of the blade path.
3b. Dynamic Rated or Spring Assisted Dampers
AS SOON AS THE LINK HAS BEEN REMOVED, THE SPRING WILL FORCE THE
BLADES TO CLOSE INSTANTANEOUSLY. THE BLADE PATH MUST BE KEPT
CLEAR.
4. Ensure the damper closes completely, without assistance. If the damper design
incorporates a locking ramp to hold the damper in the fully closed position,
confirm that the ramp locks properly.
5. Clean damper blades and other moving parts if necessary. Use of a mild detergent or solvents is recommended for
any cleaning required. Lubricate moving parts with a dry lubricant (such as T.F.E. Dry Lube). Never use a regular
lubricating oil on dampers, as it will attract dirt and grit.
6. Lift the blade package to the top of the damper to reopen and replace the fusible link. Take care not to rack, deform
or damage the blades when reopening.
Reopening spring assisted fire dampers may be extremely difficult and in some cases, impossible.
If it is determined that the damper is impossible or impractical to test or reopen, a thorough examination of the blade path
is required to ensure that nothing will prevent the damper from closing. Common obstructions include: racked damper
frames, retaining angle installation screws, construction debris and contaminants.
7. Slide the replacement fusible link onto the metal straps. When replacing the fusible link, make sure it is the same
temperature rating of the link you are replacing. If a different temperature, contact factory. Install fusible link so that
the temperature rating is facing outward and is visible.
8. Bend the metal straps up to hold the fusible link in place.
Detail 1
