Installation of the downdraft system. Read these instructions completely and carefully.n The countertop must be at least 26″ deep with aflat surface area of 231⁄2″ or more, front to back. Inaddition, other clearances to the front edge of thecountertop must be considered.– See specific cutout illustrations with your cooktopmodel to determine requirements.– A countertop with a raised lip or rolled front edgemay not allow enough flat area for installation.Installation PossibilitiesWhen the kitchen design calls for an against the wallinstallation, move 24″ deep base cabinet forward, 3″to 5″. Filler panels can be angled or flat to fill thespace between adjacent cabinets.In an island or peninsula, the counter top can be extradeep to provide seating opposite of the cooktop.Adding base cabinets on each side of the cooktopprovides extra storage and countertop work space.Advance Planning—Clearancesn Installation must conform with local codes.n The downdraft system with blower, motor andduct work will occupy the cabinet below thecountertop and cooktop.n The blower/motor assembly can be located belowthe cabinet floor. The assembly will fit between16″ floor joists.n– In this installation a transition to 6″ round is required.n The blower motor assembly can also be installedoutdoors. Order JXBC57 for remote blowerinstallations outdoors.n Refer to “Cooktop Clearances” for informationon appropriate placement and necessaryclearances when planning installation.n Refer to your specific cooktop installationinstruction for other appropriate clearances.n Avoid placing cabinetry directly above thecooking surface when possible.If cabinetry is used above the cooking surface:–Installation must conform with local codes.–Use cabinets no more than 13″ deep.–Maintain 30″ minimum clearance between cooktopand unprotected cabinets directly above cooktop.–If clearance is less than 30″, protect cabinetbottoms with flame-retardant millboard at least 1/4″thick or gypsum board at least 3/16″ thick coveredwith 28 gauge sheet steel or .02″ thick copper.–Clearance between cooktop and protectedcabinetry must not be less than 24.″EXCEPTION: Installation of a listed microwave oven orcooking appliance over the cooktop shall conform to theinstallation instructions packed with that appliance.n –Working areas adjacent to the cooktop should18″ minimum clearance between countertop andcabinet bottom.Operating Instructions Safety InstructionsInstallation InstructionsTroubleshooting TipsCustomer Service824″Flat surface areaIMPORTANT: These vents are recommended for island installations. Against-the-wall installations arelimited due to countertop depth requirements. The vent and cooktop combined depth requires an extradeep flat countertop surface.Maintain cutout clearances to front edge as specifiedBase cabinetFiller panelFiller panelB18B18Base to sinkBS30 to BS42Cover panelEnd panelCountertopoverhang percooktopclearances mustbe maintainedBase sinkBS30 Min. for JVB37BS36 Min. for JVB67