Broan BEST K7388 - Manual (Page 9)

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FIG. 9
PLENUM
(3) SCREWS
5” ALUMINUM
FLEX DUCT
5” 6” ADAPTER
BLOWER
COLLAR
PREPARE THE HOOD
NON - DUCTED CONFIGURATION
Note: The following materials must be purchased separately for non-ducted
recirculation installations.
• Non - Ducted Recirculation Kit,
Model NDK7388
• 5” diameter expandable / flexible aluminum duct.
• 1/16” diameter twist drill.
CAUTION: Do not use plastic or rigid metal ducting.
1. Remove the tape on the electrical system
plate; place the electrical system plate on
the hood (use a protection). Fig. 8
2. Discard discharge collar and damper
supplied with the hood. Install the 5” to 6”
adapter supplied with the Non-Ducted
Recirculation Kit. Fig. 9.
3. Measure the distance “A”.
4. Attach aluminum flexible duct to the 5”
adapter. Tape all joints with duct tape.
Fig. 9.
5. Assemble the recirculation plenum to the
flex-ducting. Fig. 9.
6. Drill three (3) 1/16” diameter equally
spaced holes through the duct and duct
connector of the recirculation plenum.
Fig. 9.
7. Secure duct to the plenum’s connector
with (3) sheet metal screws (not
included). Tape all joints with duct tape.
Fig. 9.
A
FIG. 8
ELECTRICAL
SYSTEM
PLATE
PROTECTION