Fire Damper Access Door Location

Ul 555 is the test standard for fire dampers.

Fire damper access door location.

Dampers equipped with fusible links internal operators or both shall be provided with an access door or. Based on these tests dampers are then given a fire rating leakage rating or both for. Over the years we discovered many deficiencies with small damper access openings. They were always way too small to perform meaningful inspections maintenance was next to impossible and the edges were often sharp and unsafe.

The duct the access doors should be increased to at least 24 inches x 16 inches in size to allow a person to enter the duct. Access door or panel a. With over 50 years of experience in the hvac industry we have inspected thousands of fire and smoke dampers. O the doors should be located as close as practicable to the dampers.

Damper fsd ceiling fire radiation damper. Combination fire smoke dampers must meet the test requirements for both ul test standards. We manufacture both non fire rated doors as well as a 1 5 hour fire rated access door. Store in an orderly manner at a safe location away from construction traffic material etc.

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. Mounting angles must overlap opening 1 in. Access doors are designed to provide entry to ductwork to access fire products. Fire dampers installation instructions.

Ul 555s is the test standard for smoke dampers. Fire smoke dampers are similar to fire dampers in fire resistance rating and also prevent the spread of smoke inside the ducts. All ul listed dampers are tested according to ul test standards. Products for over 35 years.

Has provided underwriters laboratory approved fire dampers as well as other essential products for the h v a c. Lloyd industries has been an active manufacturer of access doors fire and smoke dampers and h v a c. The non fire rated doors come hinged or double cammed galvanized or stainless steel and can be made square rectangular or round. Install as shown in figure 1 a.

When a rise in temperature occurs the fire damper. 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.