GE JVM1630 Installation Instructions Manual

Also see for JVM1635: Owner's manual Owner's manual

GE JVM1630 Installation Instructions Manual Manual pdf 6 page image

EQUIVALENT NUMBER EQUIVALENTDUCT PIECES LENGTH x USED = LENGTHRectangular-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 6″ Round or 1 Ft. x ( ) = Ft.31⁄4″ x 10″ RectangularTotal Ductwork = Ft.Equivalent lengths of duct pieces are based on actual tests andreflect requirements for good venting performance with any venthood.6* 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 31⁄4″ x 10″ rectangular or 6″ diameter round ductshould not exceed 140 equivalent feet.Outside 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. Also, make sure dampers swing freely andnothing is blocking the ducts.Exhaust connection:The hood exhaust has been designed to mate witha standard 31⁄4″ x 10″ rectangular duct.If a round duct is required, a rectangular-to-roundtransition adaptor must be used. Do not use less thana 6″ diameter duct.Maximum duct length:For satisfactory air movement, the total duct length of31⁄4″ x 10″ rectangular or 6″ diameter round duct shouldnot exceed 140 equivalent feet.Elbows, transitions, wall and roof caps, etc.,present 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 length of some typicalduct pieces.Installation Instructions1” = 2.5 cm; 1’ = 0.3 m