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8
9. INSTALL 10" ADAPTER (PK22 SERIES ONLY)
Using 2 no. 8 x 3/8” screws from parts bag, assemble the adapter on the top of the power pack.
Seal all joints with metal foil duct tape to eliminate air leaks.
10. INSTALL 10" DAMPER (PK22 SERIES ONLY)
Install 10” damper (model 421, provided with PK22 series power packs)
inside the vertical ductwork that will be attached to the power pack. Do not
install in a horizontal ductwork or directly on top of the adapter or it will
not open and close properly. Remove shipping tape if present. Secure the
damper to the duct with 3 no. 8 sheet metal screws (not provided). Ensure
the damper opens and closes freely. Seal all joints with metal foil duct tape
to eliminate air leaks.
NOTE: To optimize airflow and reduce noise, position the damper at least
17” above the top of the power pack; or as far as the duct run will
allow (see figure at right).
HJ0070A
17” MIN.
11. INSTALL ROUGH-IN PLATE FOR EXTERNAL BLOWER (PKEX22 SERIES ONLY)
Refer to the instructions included with the selected blower/rough-in kit (sold
separately) for details on installing the rough-in plate. Install the rough-in
plate so that the wiring box is located on the right side when facing the hood,
as specified on the blower housing label.
HD0500
WIRING
COVER
LOCK NUTS
HJ0026
MOUNTING SCREW LOCATIONS
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