Connect The Wiring; Attach The Grille; Install The Ductwork - Broan 678 Instructions Manual

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INSTALL THE HOUSING
(continued)
Existing Construction
4. Place housing in opening so that its bottom edge is flush
with finished ceiling. Nail to joist through keyhole on both
sides. To ensure a noise-free installation, drive another
nail through the top hole of each mounting bracket.
5. Additional mounting holes are provided for installations
where access from above is inconvenient or not possible.
Nail or screw housing directly to joists or framing.

INSTALL THE DUCTWORK

NOTE: The duct connector
has a counter-balanced
damper flap. The flap will be
"open" approx. 1" when duct connector is attached to hous-
ing. This design permits insulation to be in direct contact with
fan/light housing per UL (Underwriters Laboratories) stan-
dards. The slightest backdraft, however, will close the damper
flap, preventing air from entering unit or finished space.
1. Snap the damper/duct connector onto housing. Make sure
that tabs on the connector lock into slots in housing. Top
of damper/duct connector should be flush with top of hous-
ing.
2. Connect 4" round duct to damper/duct connector and ex-
tend duct to outside through a roof or wall cap. Check
damper to make sure that it opens freely. Tape all duct
connections to make them secure and air tight.
Broan at
Call 1-800-667-8721 anywhere in the US and Canada -
®
ADDITIONAL
MOUNTING
HOLES
FLUSH
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MODELS 678 • 678MX • 679 • 680 • 679FL • 680FL

CONNECT THE WIRING

SCHEMATIC WIRING DIAGRAM
L I G H T
S W I T C H
V E N T
S W I T C H
B L K
L I N E W H T
I N
G R D
S W I T C H B O X
DUAL CONTROL
(purchase separately)
SWITCH BOX
LIGHT
FAN
120 VAC
LINE IN
1. Wire unit following diagram above. Run electrical cable
as direct as possible to unit. Do not allow cable to touch
sides or top of unit after installation is complete.

ATTACH THE GRILLE

1. Slide light reflector into front of grille opening. Plug light
into WHITE receptacle. Place grille / reflector combina-
tion over protruding screw, and fasten in place using acorn
nut provided. HAND TIGHTEN acorn nut 1/4 turn after it
is snug.
2. Install light bulb (not included). (See next page for type
and size for your model.) Insert one tab on light lens into a
slot in the grille / reflector combination. Squeeze other tab
slightly and snap into remaining slot.
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R E D B L U W H T
L I G H T
( W H I T E )
B L K B L K W H T
V E N T
( B L A C K )
W H T
G R D
U N I T
WHITE
BLACK RED
RECEPTACLE
(LIGHT)
WHITE GROUND
(bare)
BLUE
WIRING
PLATE
accessories
L I M I T E D
Page 3
BLACK
RECEPTACLE
(FAN)