Fire Damper Access Door Location

Combination fire smoke dampers must meet the test requirements for both ul test standards.

Fire damper access door location.

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. 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. Products for over 35 years.

O the doors should be located as close as practicable to the dampers. Lloyd industries has been an active manufacturer of access doors fire and smoke dampers and h v a c. Fire smoke dampers are similar to fire dampers in fire resistance rating and also prevent the spread of smoke inside the ducts. Dampers equipped with fusible links internal operators or both shall be provided with an access door or.

Ul 555 is the test standard for fire dampers. 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. When a rise in temperature occurs the fire damper. Fire dampers installation instructions.

O the doors for fire dampers should be located so that the spring catch and fusible links are accessible when the damper is closed. Damper fsd ceiling fire radiation damper. Since the development of modern fire damper protection equipment lloyd industries inc. Access door or panel a.

The non fire rated doors come hinged or double cammed galvanized or stainless steel and can be made square rectangular or round. Install in accordance with the manufacturer s installation instructions in fire resis tance rated floor ceiling or roof ceiling assemblies. Access doors are designed to provide entry to ductwork to access fire products. Store in an orderly manner at a safe location away from construction traffic material etc.

We manufacture both non fire rated doors as well as a 1 5 hour fire rated access door. Based on these tests dampers are then given a fire rating leakage rating or both for. All ul listed dampers are tested according to ul test standards. 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.

Over the years we discovered many deficiencies with small damper access openings. Install as shown in figure 1 a.