Fire Damper Access Door Location

Damper fsd ceiling fire radiation damper.

Fire damper access door location.

Has provided underwriters laboratory approved fire dampers as well as other essential products for the h v a c. O the doors should be located as close as practicable to the dampers. Ul 555 is the test standard for fire dampers. Mounting angles must overlap opening 1 in.

Fire dampers installation instructions. Install as shown in figure 1 a. The non fire rated doors come hinged or double cammed galvanized or stainless steel and can be made square rectangular or round. Store in an orderly manner at a safe location away from construction traffic material etc.

Ul 555s is the test standard for smoke dampers. They were always way too small to perform meaningful inspections maintenance was next to impossible and the edges were often sharp and unsafe. Access door or panel a. All ul listed dampers are tested according to ul test standards.

Fire dampers are passive fire protection products used in heating ventilation and air conditioning hvac ducts to prevent the spread of fire inside the ductwork through fire resistance rated walls and floors. Fire dampers are ul555 tested and labeled devices installed in ducts and air transfer openings or air distribution systems designed to close upon the detection of heat. Access doors are designed to provide entry to ductwork to access fire products. Fire smoke dampers are similar to fire dampers in fire resistance rating and also prevent the spread of smoke inside the ducts.

We manufacture both non fire rated doors as well as a 1 5 hour fire rated access door. Lloyd industries has been an active manufacturer of access doors fire and smoke dampers and h v a c. Over the years we discovered many deficiencies with small damper access openings. When a rise in temperature occurs the fire damper.

Dampers equipped with fusible links internal operators or both shall be provided with an access door or. O the doors for fire dampers should be located so that the spring catch and fusible links are accessible when the damper is closed. Install in accordance with the manufacturer s installation instructions in fire resis tance rated floor ceiling or roof ceiling assemblies. Combination fire smoke dampers must meet the test requirements for both ul test standards.

Since the development of modern fire damper protection equipment lloyd industries inc. Products for over 35 years.