716.3.1
Damper testing.
Dampers shall be listed and bear the
label of an approved testing agency
indicating compliance with the standards in this section. Fire dampers
shall comply with the requirements of UL 555. Only
fire
dampers labeled for use in dynamic
systems shall be installed in heating, ventilation and air-conditioning systems
designed to operate with fans on during a fire. Smoke dampers
shall comply with the requirements of UL 555S. Combination
fire/smoke dampers shall comply with the requirements of both UL 555
and UL 555S. Ceiling radiation dampers shall comply with the
requirements of UL 555C or shall be tested as part of a fire-resistance-rated
floor/ceiling or roof/ceiling assembly in accordance with ATSTM E119 or UL
263.
716.3.2
Damper rating.
Damper ratings shall be in accordance with Sections
716.3.2.1 through 716.3.2.3.
716.3.2.1
Fire damper ratings. Fire dampers shall have the
minimum
fire protection rating specified in Table 716.3.2.1
for the type of penetration.
TABLE 716.3.2.1
FIRE DAMPER
RATING
|
TYPE OF
PENETRATION |
MINIMUM DAMPER RATING
(hours) |
| Less than 3-hour fire-resistance-rated
assemblies |
1.5 |
| 3-hour or greater fire-resistance-rated
assemblies |
3 |
716.3.2.2
Smoke damper ratings.
Smoke damper leakage ratings shall not be less than
Class II. Elevated temperature ratings shall not be less than 250°F
(121°C).
716.3.2.3
Combination fire/smoke damper ratings.
Combination fire/smoke
dampers shall have the minimum fire protection rating
specified for fire dampers in Table 716.3.2.1 for the
type of penetration and shall also have a minimum Class II leakage rating and a
minimum elevated temperature rating of 250°F (121°C).
716.3.3
Damper actuation.
Damper actuation shall be in accordance with Sections
716.3.3.1 through 716.3.3.4 as applicable.
716.3.3.1
Fire damper actuation device.
The
fire damper actuation device shall meet one of the
following requirements:
1. The operating
temperature shall be approximately 50°F (10°C) above the normal
temperature within the duct system, but not less than 160°F
(71°C).
2. The operating
temperature shall be not more than 350°F (177°C) where located in a
smoke control system complying with Section 909.
716.3.3.2
Smoke damper actuation.
The
smoke damper shall close upon actuation of a
listed smoke detector or detectors installed in accordance
with Section 907.3 and one of the following methods, as applicable:
1. Where a smoke damper is
installed within a duct, a smoke detector shall be installed in the duct within
5 feet (1524 mm) of the damper with no air outlets or inlets
between the detector and the damper. The detector shall be
listed for the air velocity, temperature and humidity
anticipated at the point where it is installed. Other than in mechanical smoke
control systems, dampers shall be closed upon fan shutdown
where local smoke detectors require a minimum velocity to operate.
2. Where a smoke damper is
installed above smoke barrier doors in a smoke
barrier, a spot-type detector listed for releasing
service shall be installed on either side of the smoke barrier
door opening.
3. Where a
smoke damper is installed within an air transfer opening in a
wall, a spot-type detector listed for releasing service shall
be installed within 5 feet (1524 mm) horizontally of the
damper.
4. Where
a smoke damper is installed in a corridor
wall or ceiling, the damper shall be permitted to be
controlled by a smoke detection system installed in the
corridor.
5. Where
a total-coverage smoke detector system is provided within areas served by a
heating, ventilation and air-conditioning (HVAC) system, smoke
dampers shall be permitted to be controlled by the smoke
detection system.
716.3.3.3
Combination fire/smoke damper
actuation.
Combination fire/smoke damper actuation
shall be in accordance with Sections 716.3.3.1 and 716.3.3.2.
Combination fire/smoke
dampers installed in
smoke control system shaft penetrations shall not be activated by local area
smoke detection unless it is secondary to the smoke management system
controls.
716.3.3.4
Ceiling
radiation damper actuation. The operating temperature of a
ceiling radiation damper actuation device shall be 50°F
(27.8°C) above the normal temperature within the duct system, but not less
than 160°F (71°C).
