TRUE ROUND FIRE & FIRE/SMOKE DAMPER INSTALLATION,
OPERATION & MAINTENANCE INSTRUCTIONS
IOM - TRUE ROUND FIRE & FIRE/SMOKE DAMPERS - 1016
NCA MANUFACTURING INC. • 1985 CARROLL ST. • CLEARWATER, FL 33765 • 727.441.2651 • www.ncamfg.com
6
Actuator Connections (if applicable):
Electrical 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. Be sure to check actuator for proper voltage
and current draw. Tampering with the actuator’s installation or connecting the actuator to an improper voltage and current
may void the warranty.
DAMPER OPERATION, TESTING & MAINTENANCE
The procedures discussed here are intended to insure that nothing interferes with a damper’s proper operation and to
identify and eliminate a number of potential situations that could occur and interfere with said operation.
Fire & Fire/Smoke Damper Operation:
All NCA fire/smoke dampers are operated at the factory, however pre-installation testing of its operation should be con-
ducted. Wire the actuator (if applicable) per correct wiring diagrams. Applying power to the actuator should drive the
damper open and disconnecting power should activate the actuator’s internal springs and drive closed.
WARNING: During any operating, inspection or testing of fire or fire/smoke dampers, NCA recommends the following:
1. Caution is advised when removing power from the damper’s actuator or removing the fusible link. Actuators have
very strong internal springs that may slam closed causing an abrupt interruption of airflow. As this could cause dam-
age to ductwork, consideration should be given to conducting these tests without system airflow.
2. When removing power from the actuator to check damper operation, be sure to keep fingers, hands and any other
body parts out of the blade travel path to prevent injury.
3. Check proper actuator operation. If defective, contact damper manufacturer for replacement procedures.
Fire & Fire/Smoke Damper Testing:
All fire and fire/smoke dampers and their actuators (if applicable) shall be visually inspected and cycled at specific time
intervals in accordance with the local building codes or the latest editions of NFPA 80, 90A, 92A, 92B, 101, 105, AMCA 503-
03, local codes and UL 864. Also refer to the actuator manufacturer’s recommendations.
Fire & Fire/Smoke Damper Maintenance:
Fire and Fire/Smoke Life-Safety related dampers that are properly applied, equipped with the appropriate UL labels, appro-
priately installed, and demonstrated to function as intended through a building commisioning process should require no
specific preventive maintenance. However, NCA recommends that obstructions, dirt build up, and any rust or corrosion be
removed using mild solvents or detergents. No lubrication is required, however if it is desired, damper tracks and blade
hinges may be lubricated using a dry lubricant. Never use a petroleum based lubricant as it will attract dust and
eventually impede a damper’s operation.
Message from NCA:
This installation, operation and maintenance instruction document has been reviewed and approved by the
Underwriter’s Laboratories.
As a part of NCA’s continuous improvement program, NCA reserves the right to make further improvements or changes
without notice.
IMPORTANT NOTE: Do not apply a heat gun, flame or any heat producing device directly to the thermostat. Simply
disconnecting the power to the actuator(s) shall be sufficient for testing procedures.
