Planning Ductwork and Wiring, Mounting the Housing

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.

DUCT COLLAR

COLLIER DE GAINE

FLANGES

COLLERETTES

MOUNTING TAB

PATTES DE MONTAGE

WIRING KNOCKOUT

PRÉDÉ COUPES

FIGURE 2

HANGER BARS

(SOLD SEPARATELY)

LES BARRES DE

SUSPENSION SONT

VENDUES SÉPARÉMENT

FIGURE 3

		GREEN GROUND
		LEAD
	JUNCTION BOX	VIS VERTE DE
	JUNCTION BOX	MISE A LA TERRE
		MISE A LA TERRE
	BOITER DE
	RACCORDEMENT

STANDARD	SWITCH BOX
WALL SWITCH	SWITCH BOX
(NOT INCLUDED)	BOITER
	D’INTERRUPTEUR

120vAC, 60Hz HOUSE	FIELD GROUNDING WIRE
120vAC, 60Hz HOUSE
POWER	TERRE
COURANT DOMESTIQUE
120V CA, 60 Hz

FIGURE 4

671R, 672R specifications

The NuTone 672R and 671R are advanced ventilation fan models designed to enhance indoor air quality while providing effective and reliable performance. Both models are popular choices for residential applications, offering unique features and technological advantages tailored to meet the needs of modern homeowners.

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In summary, the NuTone 672R and 671R fans are exemplary ventilation solutions that combine powerful airflow, quiet operation, energy efficiency, and user-friendly features. These characteristics make them a preferred choice for homeowners seeking reliable and effective ventilation in their living spaces.

NuTone 672R, 671R Planning Ductwork and Wiring, Mounting the Housing, Installing Ductwork

Models: 671R 672R