Whirlpool WED92HEFC Ventilation Specification - Page 7
Dryer Inspection, And Cleaning
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Option 3 - Combination System The combination system may be used in high-rise apartments, with a bank of dryers installed at several different levels. Each of these banks then exhausts into a central vertical vent. See the following illustration for an example of a combination system. A B C E D A. Central vertical duct - maximum of 0.1" (2.5 mm) water column vacuum B. Weighted damper (each dryer) C. Maximum back pressure measurement location D. Barometric damper (use depends on exhaust system design) E. Outside air source DRYER INSPECTION AND CLEANING Frequency of Exhaust System Cleaning Every exhaust system must be inspected periodically and cleaned to ensure that it is intact and free from lint accumulation. The frequency of these inspections will vary, depending on the system and usage of the dryer. For single-family usage, an annual inspection is recommended. In commercial usage or in multiple dryer systems, a more frequent inspection is recommended. Complaints of long drying times or a hot dryer top indicate the need for inspection of the exhaust system. Inspecting the Exhaust System 1. Disconnect the exhaust duct from the dryer and from the exhaust hood (at the exhaust outlet) outside of the building. 2. Inspect the interior of the duct and remove any lint accumulation. ■ Be sure that lint is removed from the exhaust hood. Lint may collect in the exhaust hood so that the flappers or louvers will not open or close completely. ■ After cleaning the exhaust hood, check that the flapper or louvers move freely. 3. Reassemble the exhaust duct and hood, checking that the joints are secure. 4. Operate the dryer and verify that the exhaust air is not obstructed in the vent and that there are no leaks in the system. ■ Seal any leaks found. 7