Service manual for Dryer Machine Midea America Company
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－ 14 －
- The duct is not dented or crushed.
- The exhaust hood damper opens and closes freely.
Manometer measurements
The static pressure in any exhaust system for best results shall be between 0.3 to 0.8
inches of water column, and cannot be less than 0 under any circumstances. with installed
duct of 4 inch diameter. Measurement must be done with the empty dryer working with a
manometer at the point where the exhaust duct connects to the dryer.
A no-heat setting should be used. Lint filter must be clean.
The correct exhaust installation is YOUR RESPONSIBILITY.
1. Use a 4-inch (10.2cm) diameter rigid aluminum or rigid galvanized steel duct.
2. Do not use a smaller duct.
3. Ducts larger than 4 inches (10.2cm) in diameter can result in increased accumulation of lint.
4. Lint should be removed regularly.
5. If a flexible metal duct must be used, use the type with a stiff sheet metal wall. Do not use a
flexible duct with a thin foil wall. A serious blockage can result if the flexible metal duct is bent
too sharply.
6. Never install any type of flexible duct in walls, ceilings, or other concealed spaces.
7. Keep the exhaust duct as straight and short as possible.
8. Secure joints with duct tape. Do not use screws.
9. Plastic flexible ducts can kink, sag, be punctured, reduce airflow, extend drying times, and
affect the dryer operation.
10. Exhaust systems longer than recommended can extend drying times, affect machine
operations, and collect lint.
11. The exhaust duct should end with an exhaust hood with a swing-out damper to prevent back
drafts and entry of wildlife. Never use an exhaust hood with a magnetic damper.
12. The hood should have at least 12 inches (30.5cm) of clearance between the bottom of the
hood and the ground or other obstruction. The hood opening should point down.
13. Never install a screen over the exhaust outlet.
14. To avoid lint buildup, do not exhaust the dryer directly into a window well. Do not exhaust
under a house or porch.
15. If the exhaust duct must run through an unheated area, the duct should be insulated and slope
slightly down towards the exhaust hood to reduce condensation and lint buildup.
16. Inspect and clean the interior of the exhaust system at least once a year. Unplug the power
cord before cleaning.
17. Check frequently to make sure the exhaust hood damper opens and closes freely.
18. Check once per month, and clean at least once per year. Note: If your clothes are not getting
dry, then check the ducting for obstructions.
19. Do not exhaust the dryer into a wall, ceiling, crawl space, or concealed space of a building,
gas vent, or any other common duct or chimney. This could create a fire hazard from the lint
expelled by the dryer.
20. Do not use non-metallic flexible duct.
21. To reduce the risk of fire, this dryer must be exhausted outdoors.
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