Amana ACO1860A owner manual Examples For 3 1/4x10, For 6 Round Systems, Total Length, 73 ft

INSTALLATION

STEP 2: PREPARE THE VENTING SYSTEM

STANDARD FITTINGS

NOTE: If the existing duct is round, you must use a rectangular-to-round adapter, with a rectangular 3" extension duct installed between the damper assembly and the adapter to prevent the exhaust damper's sticking.

DUCT LENGTH

The total length of the duct system, including straight duct, elbows, transitions, and wall or roof caps must not exceed the equivalent of 140 feet.

For best performance, do not use more than three 90 degree elbows, and keep length as short as possible.

Below are the standard fittings and their equivalent length in feet.

3

3 1/4"x10"	3 1/4"x10"	roof	3 1/4"x10" 90	°
to 6"=5ft.	cap=24ft.		elbow=25ft.
5	6		7
	3 1/4"x10"		3 1/4"x10"
90 ° elbow	wall cap	45 °elbow	flat elbow
= 1Oft.	=40ft.	=5ft.	= 10ft.
	Figure	9

To calculate the equivalent length of each ductpiece used, see the examples below.

I

				Examples
For 3 1/4"x10"		SYSTEMS			For 6" ROUND SYSTEMS
3 1/4"x10"	_	6ft. _	wall	cap	90° elbows _--_ 6ft. ---_S	wall cap
90 ° elbow	\_[_-_ 2ft.	I			transi_
1-3 1/4" x 10" 90 °elbow			=	25 ft.	1-transition	=	5 ft.
					2-90°elbows	=	20 ft.
1-Wall Cap			=	40 ft.
					1-Wall Cap	=	40 ft.
8 feet straight duct			=	8 ft.
					8 feet straight	=	8 ft.
TOTAL LENGTH			=	73 ft.
					TOTAL LENGTH	=	73 ft.

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