NuTone SmartSense QT110H Installation Instructions Manual

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 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.
G. Handle the sensor unit with care. Avoid direct contact with electronic

components while installing.

• Do not install in a ceiling insulated to a value greater than R40.

• Not for use in kitchens.

FOR BEST RESULTS

When installing the Ventilator in a new construction site, install

housing during the rough-in construction of the building. The blower unit,
sensor unit and grille should be installed after the finished ceiling is in
place.

To install a ventilator in an existing building requires an accessible

area (attic or crawl space) above the planned location.

This unit is designed to detect increased humidity levels and to
automatically activate the fan. For best results, the fan should be located
near the humidity source. Increasing the distance from the source will
lengthen the response time of the unit.

INSTALLATION INSTRUCTIONS

READ & SAVE THESE INSTRUCTIONS!

SmartSense

™

Combination

MODEL: QT110H

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

FIGURE 1

ROOF CAP
(COUVERCLE DE TOÎT)

4" DIAMETER DUCT
(CONDUIT DE 4 PO DE DIAMÉTRE)

90° ELBOW
(COUDE À 90°)

WALL CAP

(COUVERCLE MURAL)

CEILING INSTALLATION
(POSE AU PLAFOND)

INSTALLATION IN A NEW CONSTRUCTION SITE

PREPARATION

1. Remove blower/power unit assembly from housing:
A. If necessary, unplug power unit.
B. Loosen three (3) mounting screws.
C. Slide unit back to free it from mounting screws.
D. Remove unit and set aside until needed.

2. Remove one of the wiring knockouts from housing.

MOUNTING THE HOUSING

1. Refer to Figure 4. Insert mounting brackets at each end of housing.

2. Place long side of housing parallel to ceiling joist. Position housing in
desired location. Make sure housing flange is even with the planned
finished ceiling.

3. Use screws or nails (not provided) to secure mounting brackets to
ceiling joists.

4. Refer to Figure 1. Use 4" round duct to discharge the ventilator to the
outside.

IMPORTANT: Be sure nothing obstructs the discharge of the

ventilator. Make sure that insulation does not get into the duct work
or into the fan.

WIRING

Refer Figure 2.

1. Run 120v AC house power wiring (with ground) through switch box to
junction box in ventilator housing.

2. Remove ventilator junction box cover.

3. Referencing figure 2 connect the house power wire (black) to the
connector black wire. Connect the house neutral wire (white) to both
the connector and motor plug wires (white). Connect the ground wire
to the green ground screw. Connect the blue connector wire to the
black motor plug wire.

4. Replace junction box cover.

5. Connect house power wire to standard toggle switch.

NOTE: BE SURE VENTILATOR AND SWITCH ARE PROPERLY

GROUNDED. ALL WIRING MUST COMPLY WITH LOCAL
ELECTRICAL CODES.

SENSOR UNIT INSTALLATION

Refer Figure 3.

1. Align sensor cover tabs with slots in junction box cover. Firmly
press sensor cover to engage connector.

2. Secure sensor unit using mounting screw through hole in unit
cover flange.

POWER/BLOWER UNIT INSTALLATION

1. Plug motor into socket in housing's junction box.

2. Position power unit mounting plate over mounting screws in

housing.

3. Slide unit forward until the gasket fits firmly against discharge

opening in housing and mounting screws are seated in narrow
end of keyhole slots.

4. Refer to Figure 4. Securely tighten screws.

GRILLE INSTALLATION

1. Refer to Figure 4. Snap grille mounting springs' center loop into

notched bosses on the back of grille.

2. Place grille mounting springs into slots in power unit mounting

plate.

3. Press grille firmly into place against the ceiling.

FIGURE 3

INSTALLATION IN EXISTING CONSTRUCTION

Installing the ventilator in an existing house requires an accessible

area (attic crawl space) above the planned installation location.

Review “INSTALLATION IN A NEW CONSTRUCTION” and

follow all instructions which apply to your installation.

Location – locate ventilator parallel to a ceiling joist.
Wiring and Ducting – plan ducting and wiring before proceeding

with installation.

Refer to Figure 2 for wiring and Figure 1 for ducting.
CAUTION: Check area above planned installation to be sure that:

1. Ducting can be installed.

2. Wiring can be run to the planned location.

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

INSTALLATION FROM ACCESSIBLE
AREA ABOVE

1. From below, drill a small hole in ceiling at the planned location.
Stick clothes hanger through hole to help locate it.

2. Locate hole in attic or crawl space.

3. In attic or crawl space, mark ceiling for cutout by using the
housing as a template. The long side of cutout must be parallel
to ceiling joist.

4. Make cutout along marked line.

NOTE: If ceiling is plaster, cutout should be made from below

to avoid chipping plaster.

5. Install housing, connect wiring and ducting, install sensor unit,
install power unit/blower assembly and install grille.

SENSOR COVER TABS

SENSOR
UNIT

JUNCTION
BOX COVER

TIMER ADJUSTMENT

FIGURE 2

JUNCTION BOX

WIRING CONNECTIONS

BLACK

BLACK

BLACK

WHITE

WHITE

WHITE

BLUE

MOTOR PLUG

CONNECTOR

120 VOLT

AC SUPPLY