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INSTALLATION IN A
NEW CONSTRUCTION SITE
PREPARATION
Refer to Figure 1.
1. T o remove blower/power unit assembly from housing:
A. U nplug power unit.
B. R emove screw (located next to plug-in receptacle)
which holds blower/power unit mounting plate in place.
Save screw.
C. L ift mounting plate at end near the plug-in receptacle
until blower wheel clears the scroll.
D. R emove plate by pulling its tabs out of slots in housing.
Set blower/power unit aside until needed.
2. R emove one of the wiring knockout from housing.
MOUNTING THE HOUSING
Mounting Using Mounting Tabs
Refer to Figure 2.
1. L ocate fan housing next to ceiling joist.
2. U se wood screws (not provided) to loosely attach
the housing to ceiling joist through the keyhole slots
in mounting tabs.
3. A djust housing so that it will be flush with finished ceiling.
For the grille to fit properly, housing's rim must not extend
beyond finished ceiling surface.
4. W hen housing is properly adjusted, tighten screws in slots.
Mounting Using Hanger Bars
(Hanger bars sold separately, order model HB4)
Refer to Figure 3.
1. I nsert hanger bars in slots provided in housing.
2. L ocate fan housing between joists so that the bottom of the
housing is even with the planned finished ceiling. Extend
the hanger bars to the joists.
3. U se screws or nails (not provided) to secure hanger bars
to ceiling joists.
INSTALLING THE DUCTWORK
1. R efer to Figure 2. Place duct collar over flanges at
discharge opening of fan. Secure collar by snapping
tabs into slots in flanges.
2. R un 4" round duct from outside to fan's discharge opening.
3. C onnect duct to fan's duct collar.
WIRING
All wiring must comply with local codes and unit must
be properly grounded.
1. R un 120vAC house wiring (with ground) from wall switch
to fan location.
2. P ull wire through access hole and into junction box.
3. R efer to Figure 4. Use approved wire nuts to connect
house supply wires to fixture wires as follows: white to
white; black to black. Connect green or bare ground wire
to green ground lead.
POWER/BLOWER UNIT INSTALLATION
1. P lace power/blower unit into housing so that mounting
plate's tabs insert into slots in housing.
2. P ress other end of mounting plate down until it is firmly
seated over scroll and plug-in receptacles.
3. S ecure mounting plate to housing with provided screw.
4. I nsert motor plug into junction box receptacle.
FLANGES
JUNCTION BOX
STANDARD WALL SWITCH
(NOT INCLUDED) OR
OPTIONAL NUTONE
SPEED CONTROL
120vAC, 60 Hz
HOUSE POWER
DUCT
COLLAR
WIRING
KNOCKOUTS
MOUNTING
TABS
FIGURE 2
HANGER BARS
(SOLD SEPARATELY)
FIGURE 3
GREEN
GROUND
LEAD
SWITCH
BOX
EARTH GROUND
FIGURE 4
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