Fire dampers with fusible link, FLD-S-U /
FLD-S-UD. Approval UL
Periodic inspection, testing and maintenance
The basic inspection, testing and maintenance procedures are described below.
Inspection:
Regular inspection, testing and maintenance are essential to ensure that the fire and smoke dampers in an installation
operate as intended. Inspection and maintenance should include periodic testing of all equipment, including dampers,
fans, operating devices, controls, etc. Standards such as NFPA 92A, NFPA 80, NFPA105 and local codes must be
consulted for guidance with respect to the intervals of damper inspection, testing, and maintenance. The intervals of
inspection, testing and maintenance vary widely depending on the system’s length of operation, the condition of the air
and other factors.
Maintenance:
• Check the electric servomotor and tighten the coupling if necessary.
• Check the damper blades and other parts as necessary.
• Lubricate the latch, bearings and other moving parts with a silicone lubricant. Petroleum-based products should not be
used as they may accumulate dust.
• Activate the damper using the electric servomotor.
• Check the blades to make sure they close and reopen completely.
• Check the damper to make sure it is perpendicular and the blade channel is not obstructed.
Test:
• Use a moderate heat source and heat the thermal disk inside the damper.
• Once the required temperature has been reached, the power supply to the servomotor will be switched off and the
motor spring will close the damper blades.
• The damper must be tested under normal air flow conditions.
Series FSD-FLD
9
