Where a smoke detector is installed within a duct a smoke detector shall be installed inside the duct or outside the duct with?
The 1997 Uniform Building Code and the 2000 International Building Code require smoke detectors be used as follows: 1. Where a damper is installed within a duct, a smoke detector shall be installed in the duct within 5 feet (1524mm) of the damper with no air outlets or inlets between the detector and the damper.
Where a smoke damper is installed within an Unducted opening in wall a spot type listed for released service shall be installed within <UNK> horizontally of the damper?
5 feet
Where a smoke detection system is installed in all areas served by the duct in which the damper will be located the smoke dampers shall be permitted to be controlled by the smoke detection system?
717.3. Where a smoke damper is installed within a duct, a smoke detector shall be installed inside the duct or outside the duct with sampling tubes protruding into the duct. The detector or tubes within the duct shall be within 5 feet (1524 mm) of the damper.
Where should smoke dampers be installed?
Smoke dampers do not have to be installed in sleeves – they can be installed directly into the duct. However the joints between the damper frame and the duct must be sealed. This is to prevent any air leakage.
What is a fire and smoke damper?
The main purpose of a fire damper is to prevent flame from crossing a fire barrier. Fire dampers respond to heat, when the temperature reaches a set point the damper slams shut. Smoke dampers. Smoke dampers respond to the detection of smoke, and close automatically. They can also be activated remotely.
What’s the difference between a fire damper and smoke damper?
A fire damper closes once the duct temperature reaches a high enough level to melt a fusible link. A smoke damper closes upon the detection of smoke. It is UL leakage-rated to stop smoke in its tracks, which is a main difference from fire dampers.
Do smoke dampers need to be on emergency power?
Either emergency power should be provided or smoke dampers should be arranged for fail-safe closure upon failure of power to the actuator. Both the IBC and NFPA require that adequate access be provided to allow inspection and that maintenance of the smoke damper be provided.
Why are fire dampers required?
Fire dampers are devices designed to impede the spread of fire through walls, floors and partitions. Fire dampers are installed in the ducts of heating, ventilation and air conditioning systems which penetrate fire-resistant constructions and will automatically close on the detection of heat.
How do dampers work?
Dampers are plate-shaped device which opens or close to regulate the amount of air that passes through the duct and vents. Making adjustments on the damper affects the indoor temperature by pushing cold or hot air into some areas or sections of the house.
How do I know if my damper is open or closed?
Visually Check A visual check is one of the surest ways of checking whether the damper is open or not. Simply stick your head in the fireplace and look up. If you have a throat damper, the closed damper immediately above your head will block your vision. You should be able to reach up and touch the closed damper.
Do all HVAC have dampers?
Typically in most homes, your HVAC dampers are located in the main supply trunks. Some homes have no dampers at all. Hopefully most homes have a damper in each one of the supply ducts. Your home may have a supply duct go to the right and you might have one go to the left off of your furnace.
Is a damper the same as a shock?
The proper name for shock absorbers is “damper” as it serves to dampen motion. While shock is absorbed by the spring, the damper functions to modulate the oscillations (bouncing).
What is a dashpot damper?
A dashpot is a mechanical device, a damper which resists motion via viscous friction. The resulting force is proportional to the velocity, but acts in the opposite direction, slowing the motion and absorbing energy. It is commonly used in conjunction with a spring (which acts to resist displacement).
Is a coilover a damper?
A coilover consists of a damper, with a coil spring encircling it. The damper and spring are assembled as a unit prior to installation, and are replaced as a unit when either of the sub-components fails.
What type of damper is a shock absorber?
dashpot
What is inside a damper?
A damper has a piston which moves inside a sealed, oil-filled cylinder with the up-and-down movement of the wheel. The damper, which contains one or two pistons, is fixed to the car body or frame, and a pivoted lever extends from it to the axle. Some cars have dampers that contain both oil and gas.