GE JNM7196SFSS Installation Instructions Manual

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GE JNM7196SFSS Installation Instructions Manual Manual pdf 5 page image

EQUIVALENT NUMBER EQUIVALENT'8&73,(&(6 /(1*7+ [ 86(' /(1*7+Rectangular-to-Round 5 Ft. x ( ) = Ft.Transition Adaptor*Wall Cap 40 Ft. x ( ) = Ft.90° Elbow 10 Ft. x ( ) = Ft.45° Elbow 5 Ft. x ( ) = Ft.90° Elbow 25 Ft. x ( ) = Ft.45° Elbow 5 Ft. x ( ) = Ft.Roof Cap 24 Ft. x ( ) = Ft.Straight Duct 6s Round or 1 Ft. x ( ) = Ft.31ø4s x 10s Rectangular7RWDO'XFWZRUN )WEquivalent lengths of duct pieces are based on actual tests andreflect requirements for good venting performance with any venthood.* IMPORTANT: If a rectangular-to-round transitionadaptor is used, the bottom corners of the damperwill have to be cut to fit, using the tin snips, in orderto allow free movement of the damper.NOTE: If you need to install ducts, note that the total ductlength of 31ø4s x 10s rectangular or 6s diameter round ductVKRXOGQRWH[FHHGHTXLYDOHQWIHHWOutside ventilation requires a HOOD EXHAUST DUCT.Read the following carefully.NOTE: It is important that venting be installed usingthe most direct route and with as few elbows as possible.This ensures clear venting of exhaust and helps preventblockages. $OVRPDNHVXUHGDPSHUVVZLQJIUHHO\DQGQRWKLQJLVEORFNLQJWKHGXFWVExhaust connection:The hood exhaust has been designed to mate witha standard 31ø4s x 10s rectangular duct.If a round duct is required, a rectangular-to-roundtransition adaptor must be used. Do not use less thana 6s diameter duct.0D[LPXPGXFWOHQJWKFor satisfactory air movement, the total duct length of31ø4s x 10s rectangular or 6s diameter round duct shouldQRWH[FHHGHTXLYDOHQWIHHW(OERZVWUDQVLWLRQVZDOODQGURRIFDSVHWFpresent additional resistance to airflow and are equivalentto a section of straight duct which is longer than their actualphysical size. When calculating the total duct length, add theequivalent lengths of all transitions and adaptors plus thelength of all straight duct sections. The chart below showsyou how to calculate total equivalent ductwork length usingthe approximate feet of equivalent lengthof some typical ducts.5Installation Instructions