NuTone 671R, 672R User Manual

READ & SAVE THESE INSTRUCTIONS!

INSTALLATION INSTRUCTIONS

Exhaust Fan

MODELS: 671R & 672R

The Exhaust Fan consists of the housing, power unit/blower

assembly (motor, wheel, mounting plate), grille and duct collar.

FAN MUST NOT BE INSTALLED IN A CEILING INSULATED
TO A VALUE GREATER THAN R-40.

SUITABLE FOR USE OVER TUB OR SHOWER ENCLOSURE
WHEN INSTALLED IN A GFCI PROTECTED BRANCH CIRCUIT

.

FOR BEST RESULTS

When installing the Exhaust Fan in a new construction site,
install the housing during the rough-in construction. The blower
unit and grille should be installed after the finished ceiling is in
place.

To install the Exhaust Fan in an existing finished building, an
accessible area is required above the planned location (attic or
crawl space).

IMPORTANT SAFETY INSTRUCTIONS

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

A. Use this unit only in the manner intended by the

manufacturer. If you have questions, contact the
manufacturer.

B. Before servicing or cleaning unit, switch power off at service

panel and lock service panel 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.

CAUTION:

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

WARNING: To reduce the risk of fire or electric shock, do not
use this fan with any solid-state speed control.

INSTALLATION INSTRUCTIONS

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

A. Installation work and electrical wiring must be done by

qualified person(s) in accordance with all applicable codes
and standards, including fire-rated construction.

B. Sufficient air is needed for proper combustion and

exhausting of gases through the flue (chimney) of fuel
burning equipment to prevent back drafting. 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.

FIGURE 1

DUCT COLLAR

HOUSING

SLOTS

POWER UNIT/BLOWER
ASSEMBLY

MOUNTING TAB

TABS

GRILLE

C. When cutting or drilling into wall or ceiling, do not damage

electrical wiring and other hidden utilities.
D. Ducted fans must always be vented to the outdoors.
E. If this unit is to be installed over a tub or shower, it must be

marked as appropriate for the application and be connected
to a GFCI (Ground Fault Circuit Interrupter) protected branch
circuit.

F. NEVER place a switch where it can be reached from a tub or

shower.

COLLIER DE GAINE

BOITER

FENTES

ENSEMBLE MOTEUR/
VENTILATEUR

LA GRILLE

PATTES

PATTES DE MONTAGE

PLANNING DUCTWORK AND WIRING

Ductwork

1. Use 4" round duct.

2. Plan to run duct from discharge opening of fan to the
outside. For best fan performance, make the duct run as
short as possible and use a minimum number of elbows.

3. Use optional ducting accessories as required.

Wiring

Plan to run 120vAC house wiring (with ground) from the

power source through a standard wall switch.

Preparation

1. Refer to Figure 1. Remove blower/power unit assembly
from the housing.
(a) Unplug the power unit.
(b) Remove the screw (located next to plug-in receptacle)

which holds blower/power unit mounting plate in place.
Do not misplace this screw.

(c) Lift the mounting plate at the end near the plug-in

receptacle until blower wheel clears the scroll.

(d) Remove plate by pulling its tabs out of slots in the

housing. Set blower/power unit aside until needed.

2. Remove one of the wiring knockouts from housing.

MOUNTING THE HOUSING

Mounting Using Mounting Tabs
Refer to Figure 2.

1. Locate fan housing next to ceiling joist.

2. Using wood screws (not provided) loosely attach the
housing to ceiling joist through the keyhole slots in
mounting tabs.

3. Adjust housing so that it will be flush with the finished
ceiling. For the grille to fit properly, the housing’s rim must
not extend beyond finished ceiling surface.

4. When housing is properly adjusted, tighten screws in slots.

Mounting Using Hanger Bars
(hanger bars sold separately, order model HB4)
Refer to Figure 3.

1. Insert hanger bars in slots provided in housing.

2. Locate 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. Use screws or nails (not provided) to secure hanger bars to
ceiling joists.

INSTALLING DUCTWORK

1. Refer to Figure 2. Place duct collar over flanges at
discharge opening of fan. Secure collar by snapping tabs
into slots in flanges.

2. Run 4" round duct from outside to fan’s discharge opening.

3. Connect duct to fan’s duct collar.

WIRING

All wiring must comply with local codes and unit must

be properly grounded.

1. Run 120vAC house wiring (with ground) from wall switch to
fan location.

2. Pull wire through access hole and into junction box.

3. Refer to Figure 4. Use approved wire nuts to connect
house supply wires to fixture as follows: white to white;
black to black. Connect green or bare ground wire to green
ground lead.

FIGURE 4

FIGURE 3

FIGURE 2

DUCT COLLAR

WIRING KNOCKOUT

MOUNTING TAB

FLANGES

GREEN GROUND
LEAD

JUNCTION BOX

SWITCH BOX

STANDARD
WALL SWITCH
(NOT INCLUDED)

120vAC, 60Hz HOUSE
POWER

FIELD GROUNDING WIRE

HANGER BARS
(SOLD SEPARATELY)

COLLIER DE GAINE

PRÉDÉ COUPES

PATTES DE MONTAGE

COLLERETTES

VIS VERTE DE
MISE A LA TERRE

BOITER DE
RACCORDEMENT

BOITER
D’INTERRUPTEUR

COURANT DOMESTIQUE
120V CA, 60 Hz

TERRE

LES BARRES DE
SUSPENSION SONT
VENDUES SÉPARÉMENT