GE JN322, JV334, JV324, JV332, JN334, JN635, JV322, JN634, JV335, JN335, JV624 100 20 ~, Duct Installation

2. DUCT INSTALLATION

T@e “B” Models: See Figs. 4 and 9.

The hood exhaust has been designed to mate with standard 7“ round duct. (A round damper kit may be ordered. Order GE model number JXDA22.)*

A.If a rectangular duct is desired, a round-to-rectangular adapter must be used. Install a 4“ minimum length of 7“ round duct between the hood and adapter to obtain proper operation of the outlet damper.

B.If 6“ round duct is desired, a 7“ to 6“ reducer is required. Install a 4“ minimum of 7“ round duct between the hood and reducer to obtain proper operation of the outlet damper.

Type “C” Models: See Figs. 5,6 and 10.

The hood exhaust has been designed to mate with a standard 3!4” x 10” rectangular duct. If round duct is desired either of the following methods must be used:

1.Install a 4“ minimum length of rectangular duct between the hood and adapter to obtain proper operation of the outlet damper, or

2.Cut off both comers of outlet damper at score lines. Installation may then be made directly to rectangular- to-round adapter.

CAUTION: If rear or horizontal exhaust is to be used, care should be taken to align exhaust with space between 2 studs, or wall should be prepared at the time it is constructed, by leaving enough space between wall studs to accommodate exhaust.

MAXIMUM DUCT LENGTH: For satisfactory air movement (CFM) the total duct length should not exceed 65 equivalent feet of 3fi” x 10” rectangular duct. Equivalent feet are defined as total feet straight duct plus equivalent feet of elbows, transitions, wall caps, etc. Figure 7a shows the approximate equivalent feet of some typical round (6” dia.) duct elements and rectangular (3!4” x 10”) duct elements.

			Equivalent length in feet
~	:	:5		;0			:5		100		125
					I
b	200	.-	------							6“ Dia.
						---
“: 150
			3Yi’’xlo”					------
g 100										------
~	50

20 ~

FIGURE 7b

				Total
	Duct Pieces	Equivalent	Number	Equivalent
		Length	Used	Length
a	‘:~:::$	5	feet
	3%’’ X1O”	2.5	feet
D	straight
	6“,	8
Q	90° elbow
	6“
@ 45° elbow		6.5
	3%” x lo”	8.5
@ 90° elbow
	3Y4° x lo”	7
@ 45° elbow
	3%” x 1 o“	24
w 90° flat elbow
	6“ round
	to 3%” x lo”	5.5
~ transition
	3%” x lo”
a	to 6“ round	4.5
	transition
	6“ round to
	3%” x lo”
	transition	14.5
% 90° elbow
	3!4” x 1 o“ to
	6“ round
Q	transition
	90° elbow	11.5
	6“ round	34
	wall cap	6 W/O
@ with damper		damper
	3%” x 1 o“	45
@	wall cap	7 Wlo
	with damper	damper
0	6“ round	30
	roof cap

●To order call: your local GE dealer, GE Service& Parts

Center (see the telephone white pages) or the GE Answer

Center, 1-800-626-2000.

FIGURE 7a

.

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Flush or recessed bottom cabinet Flush or recessed bottom cabinet Flush or recessed bottom cabinet

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FIGURE 6 5Y4° 5%” Cutout for rear

exhaust

6