UL 1784-2020 pdf free download

UL 1784-2020 pdf free download.Air Leakage Tests of Door Assemblies and Other Opening Protectives. 6.3 The full stroke noted in 6.2 is the distance that an opening travels from fully closed to fully open when subjecting it to the cyding test. For swinging type door assemblies the amount of opening is the lesser of 90 ±5 degrees or the maximum permitted by the design of the assembly. For sliding or rolling type door assemblies the amount of opening is to be the lesser of the maximum permitted by the design of the assembly or of a sufficient amount to disturb the installed position of all gasketing matenals. 6.4 The same test sample to be subjected to the Air Leakage Tests, Section Z. shall be used for this test. The interface between the test sample and the test chamber may be resealed after the cycling test. The test sample may be provided with reinforcing parts to accommodate an actuator and a closer; that is, an electric, pneumatic, or hydraulic device, if used to operate the test sample. 6.5 To determine the closing force for swinging doors, the test door is to be placed in the open position and the closing force is to be measured along a base line perpendicular to the closed test door and 30 inches (762 mm) from the test door pivot center with two marks provided, one at 3 inches (76.2 mm) and the other 1/2 inch (12.7 mm) from the door face. 6.6 The door closer is to be adjusted to provide the minimum closing force necessary to close and latch the door, within 3 seconds after being opened to 90 ±5 degrees or the maximum permitted by the design of the assembly. 6.7 The test door is to be opened beyond the 3 inch (76.2 mm) mark. Holding the door open with a mechanical force gauge, the door is to be allowed to close slowly under the power of the door closer. The greatest fo4ce developed during dosing is to be recorded as the door travels between the 3 inch and 1/2 inch (12.7 mm) marks. 6.8 After the closing force is measure, the door closer shall be disabled so that it does not assist in sealing the door to the frame. 6.9 After cycling, no additional adjustments are to be made to the test sample while measuring the air leakage. 7 Air Leakage Tests...