Exhaust requirements, Exhaust Hood Type | Whirlpool 3395339 manual

Exhaust requirements

Fire/Health Hazard

l Do Not use non-metal, flexible duct.

l Do Not use metal duct smaller than four inches in diameter.

l Do Not use exhaust hoods with metal latches.

l Check that exhaust system is not longer than specified. Exhaust system longer than specified will: - Accumulate lint.

-Shorten the life of the dryer.

-Reduce the performance, resulting in longer drying times and increased energy usage.

Failure to follow specifications may result in a fire.

l Do Not exhaust dryers into a chimney, furnace cold air duct, attic or crawl space, or any other duct used for venting.

9 Clean the exhaust system every other year.

l Do Not install flexible duct in enclosed walls, ceilings or floors.

Accumulated lint could result in a fire or cause moisture damage.

. Exhaust dryers outside to prevent exposure to substances in gas fuels and combustion which may be harmful to your health.

The moisture and lint indoors may

Use duct tape to seal all joints.

Metal flexible duct must be fully extended and supported when the dryers are in final position. DO NOT KINK OR CRUSH THE DUCT. The metal flexible duct must be completely open to allow adequate exhaust air to flow.

Allow as much room as possible when using elbows or making turns. Bend duct gradually to avoid kinking. Remove excess flexible duct to avoid sagging and kinking that may cause reduced airflow.

The external exhaust ducts can be routed straight out the back of the dryers. Kits are available to convert the external exhaust duct to be routed right, left or through the bottom. See Page 6. Product dimensions and recessed area requirements are given on Page 7.

Side or bottom exhaust: The maximum length of the exhaust system if dryer is exhausted out the side or bottom is 16 feet with two external elbows and hood.

Rear exhaust: The maximum length of the exhaust system depends on the type of duct, the number of elbows and the type of exhaust hood. The maximum length for both rigid and flexible duct is shown in the chart.

This chart	applies only to individually	,
exhausted	units.

If dryers are installed in a confined area such as a bedroom, bathroom or closet, they must be exhausted to the outside and provision must be made for enough air for combustion and ventilation. (Check governing codes and ordinances. Also refer to the “Recessed area and closet installation instructions,” Page 7.)

An exhaust hood should cap the exhaust duct to prevent exhausted air from returning into the dryers. The outlet hood must be at least 12 inches from the ground or any object that may be in the path of the exhaust.

Four-inch outlet hood is preferred. However, a 2- l/2-inch outlet exhaust hood may be used. (A 2-l/2-inch outlet creates greater back pressure than other hoods.)

A main exhaust duct can be used for exhausting a group of dryers. Main exhaust duct should be sized to remove 200 CFM of air per dryer.

Large-capacity lint screens of proper design may be used in the main exhaust duct if checked and cleaned frequently. The room where the dryers are located should have make-up air equal to or greater than the CFM of all the dryers in the room.

cause:

-FIRE HAZARD from lint collected in dryer.

-Moisture damage to woodwork, furniture, paint, wallpaper, carpet, etc.

-Housecleaning problems and possible health problems.

Failure to follow these instructions could result in fire damage or personal injury.

Exhaust materials are not supplied.

Four-inch metal exhaust duct is required. Plan installation to use the fewest number of elbows and turns.

IEXHAUST HOOD TYPE

MAXIMUM LENGTH OF 4-INCH DIAMETER RIGID METAL DUCT

0	43 FT.	41 FT.	36 FT.
1	33 FT.	31 FT.	26 FT.
2	23 FI.	21 FT.	16 FT.
MAXIMUM LENGTH OF I-INCH DIAMETER FLEXIBLE METAL DUCT
0	30 FT.	29 FT.	24 FT.
1	24 FT.	23 FT.	18 FT.
2	16 FT.	15 FT.	10 FT.

For exhaust systems not covered by the exhaust length chart, see WhirlDool Service Manual, “Exhausting Whirlpool Dryers,” Part No. 603197, available from your Whirlpool parts distributor.

Service check: The back pressure in any exhaust system used must not exceed 0.6 inches of water column measured with an inclined manometer at the point that the exhaust system connects to the dryers.

Back-draft damper kits (Part No. 3391910) are available from your Whirlpool dealer and should be installed in each dryer’s exhaust duct to prevent exhausted air from returning into the dryers and to keep the exhaust balance within the main exhaust duct. Unobstructed air openings are required.

Each exhaust duct should enter the main duct at an angle pointing in the direction of the airflow. Ducts entering from the opposite side should be staggered to reduce the exhausted air from interfering with the other ducts.

The maximum angle of each duct entering the main duct should be no more than 30”.

Page 5