NuTone 9905 User Manual

INSTALLATION INSTRUCTIONS

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Heat-A-Vent

Combination

MODEL: 9905

FOR BEST RESULTS

In a new construction site, install the housing (complete with heater and ventilator) during rough-in construction of the building. The grille should be installed when the finished ceiling is in place.

Installation in an existing, finished building requires an accessible area (attic or crawl space) above the planned location. See “INSTALLATION IN EXISTING CONSTRUCTION.”

Do not install closer than 12 inches to a vertical surface. Do not install over tub or shower enclosure.

UNIT DIMENSIONS

Refer to Figure 1 for housing’s dimensions.

NOTE: If there will be a finished second floor above, the Model 9905 housing requires a minimum of 2" x 8" joist construction for mounting.

WIRING AND DUCTWORK

1. Run the required wiring during rough-in stage of construction.

2. Total connected load: 1630 watts.

3. Plan to run 120vAC, 60 Hz wiring (with ground) on a

separate 20 Amp circuit from a power source, through

the provided wall switch, to the housing’s junction box.

See wiring diagram.

4. Use 4" round duct.

INSTALLATION IN NEW CONSTRUCTION

PREPARATION

1. Loosen hanger bar brackets to allow bars to be inserted.

2. Refer to Figure 2. Insert hanger bars into brackets.

3. Refer to Figure 3. Slide hanger bar brackets down to end

of slot closest to outside edge of housing. Tighten brackets

in this position.

4. Refer to Figure 4. Remove junction box cover by

removing one screw.

5. Refer to Figure 4. Remove appropriate wiring knockout(s)

and install approved box connector(s).

FIGURE 1

FIGURE 2

FIGURE 3 FIGURE 4

73⁄4"

14"

HANGER BARS

ADJUSTMENT SLOT

JUNCTION BOX COVER

VENT

HEAT

KNOCKOUTS

⁄

MOUNTING THE HOUSING

1. Locate housing between joists.

2. Refer to Figure 5. Using nails, secure hanger bars to joists.

NOTE: The hanger bar brackets are adjustable. Allowing for the thickness of the finished ceiling, mount hanger bars so that edge of housing will be flush with the finished ceiling.

3. Adjust brackets as required. Tighten brackets.

INSTALLING THE DUCTWORK

1. Refer to Figure 5. Install duct collar.

2. Using 4" round duct, connect duct to collar and tape connection.

INSTALLING THE SWITCH

1. Install double-gang switch box in chosen location.

2. Refer to Figure 6. Run wiring and make wiring connections.

3. Use supplied screws to secure switch bracket assembly to switch box.

4. Using supplied screws, secure wall plate to switch bracket.

INSTALLING AND CONNECTING THE WIRING

Refer to Figure 6.

All wiring must comply with local codes and unit must

be properly grounded.

1. Using 12-gauge wire, run 120vAC, 60 Hz wiring (with ground) from a power source to the wall switch location.

The unit must be wired on a separate 20 Amp circuit.

2. Run wiring from switch location to housing as shown in the wiring diagram.

3. Make wiring connections as shown in wiring diagram.

4. Replace junction box cover. Slide slotted hole in cover over screw. Tighten screw securely.

5. Secure wire cover with one screw.

6. Insert heater and ventilator plugs into proper receptacles as shown.

MOUNTING THE GRILLE ASSEMBLY

1. Refer to Figure 7. Using two screws (provided), secure grille to housing.

FIGURE 5

FIGURE 6

DUCT COLLAR

SWITCH

BOX

HEATER JUNCTION BOX

WHT

GROUND

WHITE

120vAC LINE

HEATER (WHITE)

VENT

HEAT

BLACK

RED

BLU.

NOTE: WHEN THERMOSTAT OR TIMER IS USED, CONNECT AT

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