NuTone 8663RFT User Manual

Ventilation Fan

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INSTALLATION INSTRUCTIONS

Duct

Hanger Bars

Collar

with Fluorescent Light

MODEL: 8663RFT

Suitable for use in shower or tub enclosure when used
with GFI protected branch circuit.

Suitable for use in insulated ceilings.
WARNING: To reduce the risk of fire or electrical shock, do not use this
fan with any solid-state speed control device. Do not install in a ceiling
insulated to a value greater than R-40.

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.

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.

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

For installation in sloped ceilings up to 12/12 pitch.
H.

Ductwork must point up.

FOR BEST RESULTS

When installing the Exhaust Fan/Light in a new construction site, install 
housing during the rough-in construction of the building. The blower unit, 
reflector and grille should be installed after the finished ceiling is in place.
 Refer to instructions on page 3 to install the Exhaust Fan/Light in an exist-
ing finished building.

PLANNING DUCTWORK AND WIRING

1.   Use 4” round duct.

2.   Plan duct run from discharge opening of fan to the outside. For best fan 

performance, make duct run as short as possible and use minimum num­ber of elbows.

3.   Use optional NuTone ducting accessories as needed.

Wiring
Knockouts

Housing

Slots

Tabs

Scroll

Power/Blower

Unit

Reflector
Assembly

Acorn Nut

Mounting

Springs (2)

Grille/Lens

Assembly

FIGURE 1

IMPORTANT: Use wire suitable for 90°C.
  Plan to run 120vAC house wiring (with ground) from power source, through 
wall switches, to junction box in fan. For separate control of fan and light, two 
wall switches are required. See NuTone Catalog for accessory switches.

INSTALLATION IN A NEW
CONSTRUCTION SITE

PREPARATION

1.   Refer to Figure 1. Remove power unit/blower assembly from housing.
  A.   Unplug power unit.
  B.    Remove screw (located next to plug-in receptacle) which holds power/

blower unit mounting plate in place. Save screw.

  C.   Lift mounting plate at end near the plug-in receptacle until blower 

wheel clears the scroll.

  D.   Remove plate by pulling its tabs out of slots in housing. Set power/

blower unit aside until needed.

2.    Remove one of the wiring knockouts from housing.

MOUNTING THE HOUSING

Note: When installing in existing construction, refer to page 3

Mounting Using Mounting Tabs

Refer to Figure 2.

1.   Locate fan housing next to ceiling joist.

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

3.   Adjust housing so that it will be flush with 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

Refer to Figure 3.

1.   Insert hanger bars in slots provded in housing.

2.   Locate fan housing between joists so that the bottom of the housing is even 
with the planned finished ceiling.

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

INSTALLING DUCTWORK

1.   Refer to Figure 1. 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 fan’s discharge opening to the outside and terminate.

GROUND

SCREW

FAN

RECEPTACLE

FIGURE 3

LIGHT

RECEPTACLE

WIRING

All wiring must comply with local codes and unit must be properly
grounded.

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

2.   Insert and secure an approved box connector into wiring entrance hole.

3.   Pull wires through box connector and into junction box. Tighten box connector.

4.   Refer to Figures 4A and 4B. If a single switch will be used to control both the 
fan and the light, make wiring connections as shown in Figure 4A. If a double 
switch will be used for separate control of the fan and light, make connections 
as shown in Figure 4B.

5.   Connect the green (or bare) ground wire to the green ground lead. 

Duct Collar

Wiring

Flanges

Knockouts

GROUND

SCREW

B
L
K

BLK

SWITCH

120 VAC

FAN

RECEPTACLE

B
L
A
C
K

WHITE

WHITE

WHITEWHITE

WHITEWHITE

B
L
K

FIGURE 4A

LIGHT

RECEPTACLE

B
L
A
C
K

Bottom
Rim

Mounting
Tabs

FIGURE 2

FAN

SWITCH

120 VAC

LIGHT

SWITCH

FIGURE 4B

POWER/BLOWER UNIT INSTALLATION

1.   Refer to Figure 1. Place power/blower unit into housing so that mounting 

plate’s tabs insert into slots in housing.

2.    Press other end of mounting plate down until it is firmly seated over scroll 
and plug-in receptacles.

3.   Secure mounting plate to housing with provided screw.

4.   Insert motor plug into junction box receptacle.

COMPLETING INSTALLATION

11-1/2”

5-3/4”

1.   Insert lamp plug into junction box receptacle and secure reflector assembly to 
motor frame with nut provided.

2.   Insert lamp (42 watt compact fluorescent - NEMA TYPE CFTR42W/GX24Q) 
into the socket.

  NOTE: Lamp must be purchased separately.

3.   Insert the grille assembly’s mounting springs into the slots on both sides of 
the housing by squeezing the springs together.

4.   Press grille assembly firmly into place against ceiling.

INSTALLATION IN EXISTING CONSTRUCTION

Locate fan between ceiling joists.
  Plan ducting wiring before proceeding with installation. Refer to Figure 4 for

wiring. CAUTION: Check area above planned location to be sure that:

1.   Ducting can be installed.

2.   Wiring can be run to the planned location.

3.   No wiring or other obstruction might interfere with installation. 

INSTALLATION FROM ACCESSIBLE AREA ABOVE

1.   After determining desired location for fan, drill a small hole in the ceiling. 
Place a coat hanger or other stiff wire up through hole to help in locating from 
above.

2.   Place fan housing on top of ceiling surface and use the housing as a

template to mark area to be cut out. Cut round hole 131⁄8” in diameter for
rough opening.

3.   After cutting out opening, mount housing in the opening using the hanger 
bars provided.

A.   Insert hanger bars in slots in housing.
  B.   Position housing in opening so that bottom of housing is flush with ceiling.
  C.   Use screws or nails (not provided) to secure hanger bars to ceiling joists.

4.   Install ducting and wiring as described above.

INSTALLATION FROM AREA BELOW CEILING

Note: If you do not have access to the area above the installation location, make 
sure that the installation will not interfere with existing wiring, plumbing, etc. and 
that the wiring and ducting can be run to the desired location. It will be neces­sary to use flexible duct when installing the unit from below.

1.   The fan must be mounted between ceiling joists. Decide where you want to 
locate the fan, and then determine where the nearest joists are. 
Locating Joists – Lightly tap the ceiling. A hollow sound means no joist; a 
solid sound means a joist is present. To be sure you have located a joist, drill 
a small hole (1/16”) and probe into the ceiling with a wire.

2.   Locate the joists. Drill a starter hole in the ceiling between the joists.

3.   To exactly locate the edge of joist, saw a line from hole to joist.

4.   Refer to page 1. Remove power/blower unit from housing.

5.   Use the housing pan as a template to mark cutout: place pan centered 
between joist and trace around pan.

6.   Make cutout along outside of marked line.

7.   Refer to Figure 5. Install 2 x 4 cleats to both ceiling joists. In some cases it 
may be necessary to use more than a single cleat on one side. The distance 
between cleats must be at least 91⁄8” but not more than 10”.

8.   Remove side wiring knockout and insert and secure an approved box con­nector into the wiring entrance hole.

9.   Use pliers to bend both mounting tabs as flush as possible to the side of the 
housing.

10.  Install duct collar.

11.  String wiring through box connector and connect 4” flexible duct to duct col-

lar.

12.  Carefully push ductwork and wiring back into cutout. Place housing into 

cutout.

13.  Use wood screws to secure housing to cleats through four holes in hous-

ing’s pan. Make sure pan is flush to finished ceiling.

14.  Install Power/Blower Unit and complete installation.

2”

4”

9-1/8”-10”

Cleat

Joist

FIGURE 5

4” Flexible
Duct

120vAC
House Wiring

Duct

Mounting
Holes

Collar

Wiring
Knockout

Bend
Mounting
Tabs
Flush To
Side of
Housing

FIGURE 6

CLEANING AND RELAMPING

1.   Pull grille assembly away from ceiling.

2.   Squeezing the grille assembly’s mounting springs together, remove grille 
assembly from housing to expose socket for relamping.

3.   Clean grille and lens assembly using a mild soap and water solution. 
Assemblies with wood frames should not be immersed.

4.   Replace grille assembly flat against ceiling after cleaning or relamping.

INSTRUCTIONS D’INSTALLATION

LIRE ET CONSERVER CES INSTRUCTIONS

Ventilateur de ventialtion
avec lampe fluorescent

MODELE: 8663RFT

Prévu U.L. pour utilisation dans une cabine de douche ou de salle de
bain lorsque la dérivation est protégée avec GFI.

Prévu pour une installation dans les plafonds avec isolation.
AVERTISSEMENT: Afin de réduire les risques d’incendie ou de chocs
électriques, ne pas utiliser ce ventilateur avec des variateurs de vitesse à
semi-conducteurs. Ne pas installer dans un plafond isolé avec une valeur
plus grande que R-40.

IMPORTANTES DIRECTIVES DE SÉCURITÉ

AVERTISSEMENT: POUR RÉDUIRE LES RISQUES D’INCENDIE, DE

CHOCS ÉLECTRIQUES OU DE BLESSURES, RESPECTER CE QUI SUIT:

A.  Utiliser cet appareil seulement pour les fins prévues par le fabricant.  Pour 

toute question, communiquer avec le fabricant.

B.  Avant de faire l’entretien ou le nettoyage de l’appareil, couper le courant au 

tableau de distribution et verrouiller ce dernier pour éviter que le courant ne 
soit remis accidentellement. 
Lorsque vous ne pouvez verrouiller l’interrupteur, placez un avertissement 
clairement visible, par exemple une étiquette, sur le tableau de distribution.

INSTRUCTIONS D’INSTALLATION

ATTENTION - AFIN DE RÉDUIRE LES RISQUES D’INCENDIE, DE
DÉCHARGES ÉLECTRIQUES, OU DE BLESSURES DE PERSONNES,
RESPECTEZ LES RÈGLES SUIVANTES:

A.   Le travail d’installation et le câblage électrique doivent être éffectués pas des 

personnes qualifiées conformément aux normes et aux réglementations en 
vigueur - comprenant les nornes de construction anti-feu.

B.   Suffisamment d’air est nécessaire pour une combustion appropriée et pour 

une évacuation des gaz au travers du système d’évacuation (cheminée) de 
résidus brûlés pour ainsi éviter un retour des gaz. Suivez les données et les 
normes de sécurité des fabricants d’équipement de chauffage comme celles 
publiées par l’Association Nationale de Prévention du Feu (NFPA), et la 
Société Américaine des Ingénieurs pour le Chauffage, la Réfrigération et la 
Climatisation (ASHRAE), et les responsables des normes encastrée.

C.   Lorsque vous coupez ou percez dans un mur ou un plafond, n’abîmez pas le 

câblage électrique ou tout autre installation encastrée.

D.   Les ventilateurs avec gaine doivent toujours avoir une une évacuation extéri-

eure.

E.   Si cette unité doit être installé au-dessus d’une baignoire ou d’une douche, 

une stipulation spécifique pour cette utilisation est nécessaire.

F.   N’installez JAIMAIS un interrupteur qui peut être atteint depuis une baignoire 

ou une douche.

G.   Pour installation dans des plafonds inclinés à un angle allant jusqu’à

12/12.

H.   

La canalisation doit se diriger vers le haut.

POUR DE MEILLEURS RESULTATS

Lorsqu’on installe le ventilateur dans une construction neuve, installer le boîter 
avant de procéder aux finitions. Le bloc-moteur, le réflecteur et la grille doivent 
être installés après la finition du plafond.
    Pour installer le ventilateur dans une construction ancienne, voir les instruc-

tions en page 3.

BARRES DE

SUSPENSION

FENTES

PATTES

VIS À PAPILLON

COLLIER DE GAINE

PREDECOUPE
DE CABLAGE

BOITIER

REBORD

BLOC-MOTEUR

REFLECTEUR

RESSORTS
DE MONTAGE

ENSEMBLE
GRILLE/
COUVERCLE DE
LAMPE

FIGURE 1

IMPORTANT: Utiliser un câble qui supporte une chaleur de 90°C.

Amener un câble de 120 V CA (avec terre) de la source de courant jusq’au boîter 
de raccordement du ventilateur en passant par l’interrupteur mural. Pour la com­mande séparée du ventilateur et de la lumière, deux commutateurs de mur sont 
exigés.

INSTALLATION DANS UNE CONSTRUCTION
NEUVE

PREPARATION

1.  Voir Figure 1. Enlever le bloc-moteur du boîtier.

A.  Débrancher le moteur.
  B.   Enlever et conserver la vis (placée près de la prise de branche-ment) qui

retient la plaque de montage du moteur en place.

  C.   Soulever la plaque de montage du côté de la prise de branche-ment jusqu’à 

ce que les aubes du ventilateur dégagent le rebord.

  D.   Enlever la plaque en tirant ses pattes hors des fentes du boîter. Mettre le 

bloc-moteur de côté.

2.  Enlever une des prédécoupes pour le câblage.

PREPARATION DU GAINAGE ET DU CABLAGE

1.   Utiliser une gaine ronde de 4 pounces.

2.   Prévoir le parcours de la gaine pour évacuation à l’extérieur. Pour de mei­leures performances, s’arranger pour que la gaine soit aussi courte que pos­sible et utiliser un minimum de coudes.

3.   Utiliser les accessories de gainage NuTone en option.