Broan 791LED Instructions Manual

MODEL 791LED

ADDITIONAL

JOIST

!

VENTILATION FAN
WITH LED LIGHT

READ AND SAVE THESE INSTRUCTIONS

Page 1

WARNING

TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR
INJURY TO PERSONS, OBSERVE THE FOLLOWING:

1. Use this unit only in the manner intended by the manufacturer.
If you have questions, contact the manufacturer at the
address or telephone number listed in the warranty.

2. Before servicing or cleaning unit, switch power off at service
panel and lock the service disconnecting means to prevent
power from being switched on accidentally. When the service
disconnecting means cannot be locked, securely fasten a
prominent warning device, such as a tag, to the service panel.

3. Installation work and electrical wiring must be done by a
qualified person(s) in accordance with all applicable codes
and standards, including fire-rated construction codes and
standards.

4. Sufficient air is needed for proper combustion and exhausting
of gases through the flue (chimney) of fuel burning equipment
to prevent backdrafting. Follow the heating equipment
manufacturer’s guideline and safety standards such as those
published by the National Fire Protection Association (NFPA),
and the American Society for Heating, Refrigeration and
Air Conditioning Engineers (ASHRAE), and the local code
authorities.

5. When cutting or drilling into wall or ceiling, do not damage
electrical wiring and other hidden utilities.

6. Ducted fans must always be vented to the outdoors.

7. Acceptable for use over a tub or shower when connected to
a GFCI (Ground Fault Circuit Interrupter) - protected branch
circuit.

8. Not for use in kitchens.

9. This unit must be grounded.

10. This unit is U.L. listed. Type I.C. inherently protected.

TYPICAL INSTALLATIONS

2 x 4

CEILING

JOIST

CEILING

MATERIAL

HOUSING

HOUSING

GRILLE

HOUSING MOUNTED

DIRECTLY TO JOIST

2x6 (or larger)

Discharge parallel to joists.

"I"

JOIST

CEILING

MATERIAL

HOUSING MOUNTED TO “I” JOIST

Requires additional framing

for mounting.

Discharge parallel to joists.

Additional framing must be a 2x6 (minimum height).

*

CEILING
JOIST or

TRUSS

CEILING

MATERIAL

HOUSING MOUNTED

TO 2x4 TRUSS

Discharge parallel to joists.

FRAMING

HOUSING

HOUSING

GRILLE

"I"

HOUSING

HOUSING

*

GRILLE

2 x 4
CEILING
JOIST or

TRUSS

CAUTION

1. For general ventilating use only. Do not use to exhaust
hazardous or explosive materials and vapors.

2. This product is designed for installation in FLAT CEILINGS
ONLY. Do not mount this product in a wall.

3. The light fixture assembly must be mounted to the fan
housing assembly included with this product. Do not mount
the light fixture assembly to a wiring outlet box.

4. To avoid motor bearing damage and noisy and/or
unbalanced impellers, keep drywall spray, construction
dust, etc. off power unit.

5. Please read specification label on product for further
information and requirements.

Installer: Leave this manual with the
homeowner.

Homeowner: Use and Care
information on page 4.

PLAN THE INSTALLATION

INSULATION

(Place around and

over fan housing.)

FAN

HOUSING

POWER
CABLE*

Seal gaps

around

housing.

4-IN. ROUND

DUCT*

*Purchase
separately.

Seal duct
joints with

tape.

4-IN. ROUND

OR

ELBOWS*

ROOF CAP*

(with built-in

damper)

Keep duct

runs short.

WALL CAP*
(with built-in

damper)

MODEL 791LED

Page 2

NOT FOR USE IN A COOKING AREA

Do not install above or inside this area

45° 45°

Cooking
Equipment

Floor

PREPARE THE HOUSING

INSTALL THE HOUSING

New Construction

1. Choose the location for your fan/light in the ceiling. For
best possible performance, use the shortest possible duct
run and a minimum number of elbows.

TAB

TAB

MOUNTING SCREWS

2. Position fan housing against joist so that bottom
edge of housing will be flush with finished ceiling.

Additional positioning feature for 1/2” thick

ceiling material:

Bend tab, on either side of housing,

housing until tab contacts bottom edge of joist.

3. Use (4) mounting screws (included) to attach housing
to joist.

BOTTOM EDGE OF JOIST

900 outward. Lift

1. Unplug blower and remove (3) screws securing blower
assembly to housing.

2. Remove blower
assembly from
housing and set
blower assembly
aside.

3. Unplug light wires
from white receptacle.
Remove wiring plate
from housing and set
plate aside.

Existing Construction

1. Choose the location for your fan/light in the ceiling. For
best possible performance, use the shortest possible duct
run and a minimum number of elbows.

2. In attic,
position fan
housing
against joist.
Trace outline
of housing
on ceiling

material.

3. Set housing aside
and cut ceiling
opening slightly
larger than marked.

UNIT

SWITCH BOX

LINE

4. Place housing in

MATERIAL & HOUSING

opening so that
its bottom edge is
flush with finished
ceiling. Screw
housing to joist
through holes in
housing as shown.

5. Seal between
ceiling material and

SEAL BETWEEN CEILING

housing to prevent
air leakage.

MOUNTING SCREWS

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 housing. This design permits insulation to be
in direct contact with fan/light housing per UL (Underwriters
Laboratories) standards. The slightest backdraft, however,
will close the damper flap, preventing air from entering unit
or finished space.

MODEL 791LED

Page 3

FINISH THE INSTALLATION

1. Re-install blower
assembly removed in
Step 1 under “PREPARE
THE HOUSING”. Plug
blower into black
receptacle and light plug
into white receptacle.

1. Connect 4” round
duct to damper/
duct connector
and extend 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.

CONNECT THE WIRING

SCHEMATIC WIRING DIAGRAM

LIGHT
SWITCH

VENT
SWITCH

BLK
WHT

IN

GRD

LIGHT

FAN

DUAL CONTROL

(purchase separately)

BLACK
WHITE
BLUE

SWITCH BOX

120 VAC LINE IN

RED

BLK

WHT
GRD

BLU

BLK

RED
GROUND

(bare)

LIGHT

(WHITE)

(BLACK)

RECEPTACLE

RECEPTACLE

1. Wire unit as shown. Re-install wiring plate removed in
Step 2 under “PREPARE THE HOUSING”.

2. Run electrical cable as direct as possible to unit. Do not
allow cable to touch sides or top of unit after installation
is complete.

VENT

BLACK

(FAN)

WHITE

(LIGHT)

WHT

WHT

LED WIRE

CONNECTORS

GRILLE

SPRINGS

2. Locate grille over fan housing. Squeeze grille springs
together and insert springs into slots in sides of
housing.

3. Connect LED wire connectors together.

4. Push grille up against ceiling.

USE AND CARE

Operation

To Operate Fan and Light

Use only an ON/OFF or timer switch to operate the fan.
Use only an ON/OFF switch, timer switch or relay-switch

to operate the LED light.
The LED light cannot be used with a dimmable switch.
Both the fan and LED light can be put on one switch.

WARNING Before servicing or cleaning unit,

switch power off at service panel and lock the service
disconnecting means to prevent power from being
switched on accidentally. When the service disconnecting
means cannot be locked, securely fasten a prominent
warning device, such as a tag, to the service panel.