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.
MOUNTING SCREW LOCATION
HJ0035
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.
DAMPER HINGE
PARALLEL TO
POWER PACK
SIDES
17” min.
HJ0036A
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.
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.
LEFT SIDE MOUNTING
SCREW LOCATION
RIGHT SIDE MOUNTING
SCREW LOCATION
HD0368
HD0369
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