Depress the disc on DRS-30 or HS-10 (located inside the duct. This will disconnect power to the actuator and cause the damper to close. Push the reset button (located outside the duct) to reengage power and reopen the damper.
How do you reset a fire damper?
The damper automatically resets if nuisance alarms occur and the system is reset. , the damper can be reopened by pressing the reset button located on the damper assembly. When temperatures in excess of 165°F/74°C (212°F/100°C or 285°F/ 141°C optional) are detected, the damper will close and lock.
What activates a smoke damper?
Smoke dampers operate automatically on detection of smoke and must function so that smoke movement through the duct is halted. Their activation can be by area detectors that are installed in the related smoke compartment or by detectors that are installed in the air duct systems.
How do you manually open fire damper?
You should turn the knob clockwise, as far as it can go, or push the rod all the way up to open the damper. If there is a metal chain in or besides your fireplace, it means that your chimney has a top-mounted damper. If the chain is tightly attached to a hook, the damper is closed.
Are smoke dampers normally open or closed?
The smoke detector or relay from alarm panel is wired in series as shown in the drawing below. If smoke is detected, the contact opens and again the damper springs closed. If there is a building fire alarm, then the smoke detector auxiliary contacts close and signal an alarm.
What is the difference between a fire damper and a smoke damper?
Whilst fire dampers function to help stop the passage of fire, smoke dampers work in a similar way to preserve the integrity of physical smoke barriers e.g. floors and walls. They can also be found within air conditioning and ventilation ductwork.
How does a smoke fire damper work?
Fire dampers respond to heat, when the temperature reaches a set point the damper slams shut. Smoke dampers respond to the detection of smoke, and close automatically. They can also be activated remotely. They resist the passage of smoke, toxic gases and air through a fire barrier.
How do you force a damper to open?
0:554:13UPSTAIRS IS HOT: Adjust Dampers For Heating Plus How to ... - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo what you do is you loosen the wing. Nut. You adjust it sometimes it takes a pair of pliers. YouMoreSo what you do is you loosen the wing. Nut. You adjust it sometimes it takes a pair of pliers. You know you turn it so you can adjust that damper.
How do you unstick a damper?
Spray WD-40 on your chimney damper to protect it from rust. It will also keep it lubricated so it opens and closes easily.
How do I get my fireplace damper unstuck?
Take a steel brush or a handheld whisk broom and clean the damper and the area around it. This typically requires laying on your back inside of the fireplace which is not comfortable. If the damper is stuck, take a penetrating oil like WD-40 and spray the handle and the hinge where it connects to the damper plate.
How do you know if your dampers are open or closed?
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.
How do you tell if dampers are open or closed?
If you are looking at a duct that is coming off the furnace and going straight up like it is going to the upstairs, and the wing is in the same direction as the duct, it is open. If the wing is in the opposite or vertical position to the ductwork, then the damper is closed.
Do fire smoke dampers require power?
Motorized actuators are normally used for the operation of smoke dampers. The designer must consider the case where there is loss of normal power to the damper actuator. Either emergency power should be provided or smoke dampers should be arranged for fail-safe closure upon failure of power to the actuator.
How is a smoke alarm activated?
Smoke alarms detect fires by sensing small particles in the air using a couple of different kinds of technologies. Once they detect those particles above a certain threshold, they signal the alarm to sound so that you and your family can get to safety and call 911. Smoke alarms save lives.
How is a smoke alarm triggered?
Photoelectric smoke detection uses a steady beam of light. Once smoke particles enter the internal chamber of the device, the particles scatter the beam and redirect it to a photocell, which then triggers the alarm. When it comes to smoke alarms, there are two main types: photoelectric and ionization.
Do smoke dampers need power?
Motorized actuators are normally used for the operation of smoke dampers. The designer must consider the case where there is loss of normal power to the damper actuator. Either emergency power should be provided or smoke dampers should be arranged for fail-safe closure upon failure of power to the actuator.
Do smoke dampers require power?
Smoke dampers are motorized with electric or pneumatic actuators and may be controlled by a smoke or heat detector signal, a fire alarm signal, or by the building control system to accomplish the intent of the design.
How hot does a fire damper get?
Experts install fire dampers with a range of fusible link ratings, with temperatures ranging from 165 to 286 degrees Fahrenheit. The fire damper’s blades remain open after being installed, allowing air to pass through the HVAC ductwork. In the event of a fire, the blades of the damper stay open until the damper’s fusible link reaches its melting point. Once the fusible link melts, the damper remains closed until a new link is installed.
Why do you need a fire damper?
Experts typically install fire and smoke dampers in partnership with fire-resistance-rated floors and walls to seal off the fire from accessing another part of the building. When the damper detects smoke or flames, it closes, preventing the fire from spreading.
What Is a Fusible Link Fire Damper?
A fusible link fire damper is a style of fire damper or smoke damper. While automated systems or smoke alarms control some dampers, a fusible link fire damper is controlled by the fire itself. The fusible link is sensitive to high temperatures and remains open until exposed to high heat, such as that from a fire.
How does a fusible link work?
The fusible link is sensitive to high temperatures and remains open until exposed to high heat, such as that from a fire. In a fire, the fusible link fire damper remains open until the fire becomes close enough in proximity to melt the surround of the fusible link. Once the surround melts, the link opens, releasing the damper blades ...
Why is it important to have a fire damper installed?
These dampers are one and done pieces of equipment, so it’s critically important that a certified contractor installs your fire damper to ensure that it is in working order and will protect you when the need arises.
Do dampers use fusible links?
There are various damper styles that do not use fusible links, including smoke dampers and combination fire/smoke dampers. Instead, smoke dampers rely on an actuator to open and close in emergencies.
How long does a fire damper last?
Commonly fire dampers will be rated and manufactured for a time period of 90 minutes or 180 minutes [1.5hrs or 3hrs], according to the International Building Code [717.3.2.1 Fire Damper Rating] the following is required: Type of Penetration. Minimum Damper Rating [hrs]
Where are fire dampers installed?
Fire dampers are used and installed between a fire enclosure and the common space.
What is the difference between a Fire Damper and a Smoke Damper?
While they can look similar on the surface, there are clear differences between a fire damper and a smoke damper.
What is a curtain-type fire damper/fusible link fire damper?
A curtain-type fire damper or usually referred to as a fusible link fire damper is the most common of all fire dampers found on a project and operates via activation of a fusible link, releasing a curtain that drops under gravity aided by a spring to provide a barrier between different zones of a building.
What Type of Installation is Required for a Fire Damper?
A complete review of the drawings should be conducted to understand the orientation that the fire damper will need to be installed, and the type of compartments they are covering.
Who can test fire dampers?
The British Standard BS: 9999 states that a competent person must test fire dampers after installing and at regular intervals not exceeding two years.
What is a curtain fire damper?
A curtain-type fire damper or usually referred to as a fusible link fire damper is the most common of all fire dampers found on a project and operates via activation of a fusible link, releasing a curtain that drops under gravity aided by a spring to provide a barrier between different zones of a building . They are the most common as they are the ...
What tools are used to reset dampers?
The usual tools that are used to drop test and reset dampers are our hands, however, this has its risks, and sometimes it’s just hard work.
When should fire dampers be inspected?
Fire codes and standards require that fire dampers are tested, maintained, and inspected with documentation at regular intervals, after installation, and throughout their intended life, to ensure that they operate correctly and as intended when needed.
How often should fire dampers be tested/maintained and inspected?
Fire dampers should be tested under 3 activities, with the code requirements listed below:
Who can test the fire dampers?
NFPA 80 [Section 19.4.1] – notes that fire damper inspection and testing should be completed by a person who is qualified with knowledge and who understands the operation and design of the systems being worked upon.
What Fire damper testing tools can we use?
The usual tools that are used to drop test and reset dampers are our hands, however, this has its risks, and sometimes it’s just hard work.
When inspecting and/or testing a damper is noted, should remedial works be completed?
If during the inspecting and/or testing a non-compliant damper is noted, then remedial works should be completed immediately and all visual inspections and physical testing repeated and documented.
How many activities are required to test fire dampers?
Fire dampers should be tested under 3 activities, with the code requirements listed below:
What is a fire damper drop test?
They are typically held open by a ‘fusible link’, which BS 9999:2017 defines as a ‘device that releases a component such as a fire damper or fire shutter at a set temperature’.
How often should fire dampers be tested?
Spring-operated fire dampers should be tested annually and fire dampers situated in dust-laden and similar atmospheres should be tested much more frequently, at periods suited to the degree of pollution’. Dampers in hospitals or high-risk environments will require more frequent testing.
When met by high heat, a fusible link will release and close the fire damper?
When met by high heat, a fusible link will release and close the fire damper. The fusible link can also be released manually, for testing purposes. Our experts will manually release the fire damper and visually check the integrity of the mechanism. All fire dampers should close fully on release – it is the integrity of the closure that prevents the spread of smoke and fire in an emergency situation.
Do fire dampers prevent fires?
All fire safety systems must be regularly and professionally maintained to ensure the safety of building occupants – a faulty fire damper will not prevent the spread of fire. With the enactment of the Regulatory Reform (Fire Safety) Order 2005, it is now the employer’s responsibility to maintain their fire safety systems.
Can a fire damper be cleaned?
As your ventilation system is used it will accumulate dust and debris, which could prevent the fire damper from operating. Our team will clean your fire damper as part of the testing service. If our specialists find a high build-up of dust or debris within any ductwork area, we will report back with photographic evidence.
