8
12. INSTALL THE ADAPTER AND THE DAMPER (
DUAL BLOWER MODEL ONLY) (CONT'D)
17” min.
HJ0036A
D
AMPER
HINGE
PARALLEL
TO
POWER
PACK
SIDES
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 reduce noise, 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). Ensure damper opens and closes freely. Seal all joints with metal foil duct
tape to eliminate air leaks.
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
L
EFT
SIDE
MOUNTING
SCREWS
LOCATION
HD0369
R
IGHT
SIDE
MOUNTING
SCREWS
LOCATION
14. INSTALL THE POWER PACK
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.
CAUTION
Take care not to kink ducting or pinch electrical cable when installing the power pack.
HD0370
C
LASPING
SPRINGS
Insert the power pack in the custom hood until the bottom of the clasping springs (2 per side) rests on the
top of the custom hood base (grey zone in illustration at right).
