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5
Planning
Due to its fl exible design, this downdraft system can be used to
exhaust airborne contaminants when cooking with a variety of gas
or electric cooking appliances - including cooktops, rangetops,
slide-in ranges and free-standing ranges.
It can be mounted in island, peninsula, or conventional wall
locations. The blower (purchase separately) and electrical panel
can be mounted to the downdraft unit, inside the cabinet, or in a
convenient remote location.
This unit can be easily installed following these basic steps:
• Cut out the countertop opening.
• Mount the unit in the cabinet.
• Install the blower and electrical panel.
• Connect the ductwork and electrical.
• Install the trim.
• Install the cooking appliance.
Note: the high level of air ow of this appliance may affect the
gas ame on some types of gas cooktops. This is NORMAL and
will cause no harm, but can be corrected by lowering the speed
of the blower.
Gas Cooktop Seal Kit is recommended for use with all gas
cooktops. The kit creates a seal between the cooktop and the
lower cabinet. Includes trim bracket and trim seal. See Optional
Accessories section.
Taking Measurements
• Refer to the cooktop installation instructions for dimensions
of cooktop, countertop cut-out, and cabinet requirements.
However, it is recommended that oversized cabinets be used
for easier installation. Custom island designs need to account
for deeper cabinets - especially when installed with a range in
front of the downdraft or when mounting the blower behind the
downdraft. You must also plan for an access door.
• Cooktop depth can vary greatly from one to another. This
may cause the fi t of these two appliances to be rather tight.
Pay special attention to the areas of potential interference
highlighted below. A countertop with (A) a raised lip and/or (B)
a backsplash may not allow enough fl at countertop for a proper
installation. Note that 2-3/4" of fl at countertop is required
behind cooktop and that 2-7/8" is necessary between the back
edge of the cooktop and the inside of cabinet back.
2-7/8"
A
B
2-3/4"
Downdraft
Cooktop
Front to Back
Inside Cabinet Depth
CountertopCountertop
Before You Begin
Downdraft
8" Round Elbow
*To Model 643 (8" Round Wall Cap)
*
PF6 (Flex Blower)
8
"
Straight Duct
Wiring Box
Ducting Confi gurations
Front Exhaust with Flex Blower
• The downdraft blower system is designed for use with 8"
round ductwork using a fl ex blower or 10" round ductwork
using a remote blower. (Purchase blowers separately.)
• For best performance: Choose the ducting option which allows
the shortest length of ductwork and a minimum number of
elbows and transitions. Check location of fl oor joists, wall
studs, electrical wiring or plumbing for possible interference.
For more detailed ducting information see appendices A-G
at the end of document.
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