UL 103:2010 pdf download- Factory-Built Chimneys for Residential Type and Building Heating Appliances
UL 103:2010 pdf download- Factory-Built Chimneys for Residential Type and Building Heating Appliances.
23 Temperature Test — 210OF (1149°C) Flue Gases
23,1 The maximum temperature attained on the test structure. such as ceilings, enclosures, floors, and hoists, and on surfaces of the chimney assembly at points of zero clearance to the test structure, shall be not more than 175°F (97°C) above ambient temperature when tested as descnbed In 23.3 — 23.6 or after the flue-gas generator is shut oft.
23.2 A chimney shall comply with the requirements specified in 16.2 and 16.3 after being tested in
accordance with 23.3 — 23.6.
23.3 The test is to be started with the test chimney and the test structure at room temperature.
23.4 The test conditions then are to be established at the inputs shown in Column 2 of Table 17.1, and maintained to produce flue gas at a temperature of 930°F (517°C) above room temperature as measured by means of a flue-gas thermocouple as shown in Figure 18.1 and located centrally in the generator. The operation is to be continued until equilibrium temperatures are attained on surfaces of chimney parts and the test structure.
23.5 After equilibrium lernperatures are attained under the test conditions described in 23.4, the input to the flue-gas generator is to be increased to that specihed in Column 4 of Table 17.1 and regulated to produce a temperature of 2030°F (1128°C) above room temperature at the location designated in Figures 17.10 and 17.13. The test period shall be 10 minutes. exclusive of the time taken to reach the 2030°F temperature rise above room temperature (which shall not exceed 15 minutes). At the end of the test period the flue-gas generator is to be shut off.
23.6 The test specified in 23.5 is to be conducted three times. The first test is to be conducted with the entire connector pipe uninsulated. The two remaining tests are to be conducted with the full length of the connector pipe insulated with a 3 inch (75 mm) thick layer of ceramic blanket insulation or equivalent insulation having a K factor of 1.7 at 2000°F (1079°C). The insulation is to be applied to the chimney connector after equilibrium temperatures are attained as described in 23.5 and prior to increasing the input to the flue-gas generator to produce the flue-gas temperature rise of 2030°F (1128°C) above room temperature.
24 Positive Pressure Applications Test
24.1 A chimney system intended for installation in positive pressure applications where the chimney is subject to positive rather than negative or neutral pressure in the chimney flue shall be evaluated as described in 24.2 — 24.7.
24.2 Individual chimney sections with joints are to be assembled in a manner that creates a straight assembly incolporating a minimum ratio of 50 inches (1270 mm) of seal per cubic foot of sealed sample. The diameter of the chimney system tested shall be at least 40 percent of the maximum diameter of the series of chimney diameters being evaluated.
24.3 The chimney assembly is to have its ends capped (sealed), fhen be pressurized to a 60 inch water column (14934 Pa) or the manufacturer’s rated pressure, whichever is greater. If any leakage occurs, the leakage rate is to be noted.
24.7 The manufacturer’s rated pressure or 60 inch water column (14934 Pa) shall not be shown on the
maricing and iristallahon instructions unless the calculated test results comply with the equation shown in 24.6.
25 Draft Test
25.1 A chimney shall produce a draft of not less than 0.006 inch (0.15 mm) wate column per loot (300 mm) of vertical chimney when tested as described in 25.2 and 25.3.
25.2 The test is to be conducted with the chimney erected and prepared foi test as described in the Temperature Test — 1000°F (538°C) Flue Gases, Section 20. Starting with the chimney at room temperature, the flue-gas generator is to be fired to at least an input indicated in Column 2 of Table 17.1, and the secondary air regulated to produce flue gases at a temperature of 930°F (517°C) above room temperature, measured at the location in the flue ppe designated in Figure 17.11. The draft at the inlet to the chimney is to be measured within 15 minutes of the start of firing.
25.3 Draft is to be measured by a draft gauge that reads directly to 0.005 inch (0.10 mm) waler column and that has an accuracy of ±0.0025 inch (0.050 mm). The gauge is to be checked for zero reading at the beginning and at the end of each test.