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12. INSTALL THE ADAPTER AND THE DAMPER (DUAL BLOWER MODEL 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.
Install 10” damper inside the VERTICAL ductwork that will be attached to power pack.
Do not install in a horizontal ductwork or it will not open and close properly. Remove
shipping tape if present. To optimize airflow and quiet sound, position the damper at least
17” above the top of the double blower power pack; or as far as the duct run will allow. Also,
ensure the damper hinge will be parallel to power pack sides (see figure at right). Secure
the damper to the duct with 3 no. 8 sheet metal screws (not provided). Check to make sure
damper opens and closes freely. Seal all joints with metal foil duct tape to eliminate air
leaks.
HJ0035
MOUNTING SCREW LOCATION
17” min.
HJ0036A
DAMPER HINGE
PARALLEL TO
POWER PACK
SIDES
Using a 5/16” socket, or a Phillips no. 2 or a
Robertson no. 2 screwdriver, remove all blower
mounting screws from the inner top of the power
pack. Set blower and screws aside.
13. REMOVE THE BLOWER
(SINGLE BLOWER MODEL, HORIZONTAL DISCHARGE ONLY)
In order to ease the power pack alignment with horizontal ductwork, disassemble the blower from the power pack before
installing it in the custom hood.
HD0368
LEFT SIDE MOUNTING
SCREW LOCATION
HD0369
RIGHT SIDE MOUNTING
SCREW LOCATION