NuTone QT150 User Manual

INSTALLATION INSTRUCTIONS

READ & SAVE THESE INSTRUCTIONS!

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Suitable for use with solid state speed controls.

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WARNING: To reduce the risk of shock, disconnect power

before servicing.

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Not for use in kitchens.

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Uses standard 31⁄4" x 10" ducting.

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Plastic grille snaps in with torsion springs.

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Designed for ceiling installation.

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The ventilator consists of the housing, mounting brackets, junction box, power unit/blower assembly, damper section and grille assembly.

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Fan must not be installed in a ceiling thermally 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 draft. 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.

FOR BEST RESULTS

When installing the ventilator in a new construction site, install the housing during the rough-in construction of the building. The power unit and grille should be installed after the finished ceiling is in place.

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

QuieTTest

Twin Blower Ventilator

MODEL: QT150 (For Ceiling Installation)

FIGURE 1

FIGURE 2

POWER UNIT

ROOF CAP

VERTICAL DISCHARGE

31⁄4" x 10" DUCT

KNOCKOUTS

FAN HOUSING

HORIZONTAL DISCHARGE

WALL CAP

POWER CONNECTOR

SLOTS

WING NUT, HANGER ROD

HANGER ROD

FIGURE 3

VERTICAL DISCHARGE 31⁄4" x 10" DAMPER SECTION

31⁄4" x 10" DAMPER SECTION

HORIZONTAL DISCHARGE

INSTALLATION IN A NEW CONSTRUCTION SITE

PREPARATION

CAUTION: When handling the power unit do not reach in

the end openings and bend the blower wheels.

Refer to Figure 1.

1. Remove power unit from housing assembly.

(a) If necessary, unplug power plug from mating connector.

(b) Loosen wing nut on hanger rods that hold the power unit.

(d) Set power unit aside until needed.

2. Refer to Figure 2. Remove one of the wiring knockouts from

the housing.

3. Refer to Figure 2. The ventilators can be ducted for either

vertical or horizontal discharge. Determine the method of

discharge that will be used.

4. Refer to Figure 3. Mount 3

⁄4" x 10" damper section on top of housing for vertical discharge or on the side of housing for horizontal discharge with two (2) screws furnished.

MOUNTING THE HOUSING

NOTE: These ventilators are designed for installation

between 16" O.C. ceiling joists with no framing necessary. If the building structure has 24" O.C. joists construction, framing will be required.

1. Position housing between ceiling joists and adjust height to finished ceiling. Loosen two (2) hex nuts for each mounting bracket from inside the housing and make the adjustment. Tighten the four (4) hex nuts.

NOTE: There are four (4) extra mounting slots in the housing long sides for mounting or relocating the mounting brackets.

2. Refer to Figure 4. Screw housing to joists using holes

in mounting brackets and four (4) screws furnished.

3. Refer to Figure 2. Install standard 3

⁄4" x 10" ductwork from damper section to outside wall or through roof and mount appropriate wall or roof cap (optional.) Refer to the instructions provided with the caps.

IMPORTANT: Be certain there are not any obstructions at the discharge of the ventilator. Be certain insulation does not get into the ductwork or into the blower.

WIRING

NOTE: All wiring connections must comply with local codes,

ordinances and the National Electrical Code and the ventilator must be properly grounded.

1. Refer to Figure 5. Loosen screws and remove junction box.

2. Run 120vAC supply wiring with ground through switch box to knockout in ventilator housing and secure with box connector.

3. Refer to Figure 6. Connect supply wires to ventilator wires: black to black, white to white. Connect ground to green ground lead.

4. Replace junction box and tighten screws.

5. Connect supply wire to a listed general use wall switch in switch box of use a listed timer suitable for the voltage and current rating of the fan or a listed solid-state speed control (optional.)

POWER UNIT INSTALLATION

1. Refer to Figure 7. The power unit mounts with two hanger rods to the mounting brackets. Insert the hanger rods through the holes in the mounting bracket hooking them from the inside to the outside.

2. Position the power unit so that its discharge opening is in line with the installed ductwork. Hold the power unit in position between the mounting brackets and swing the hanger rods into the slots on the power unit and securely tighten the wing nuts.

3. Plug the three (3) wire connector from the junction box into the wire receptacle connector from the power unit making sure the plug is properly aligned.

FIGURE 4

FIGURE 5

FIGURE 6

MOUNTING BRACKET

VENTILATOR HOUSING

JUNCTION BOX

GREEN

GREEN GROUND SCREW

WHITE

SWITCH BOX

120vAC, 60 Hz HOUSE POWER

STANDARD WALL SWITCH

EARTH GROUND

BLACK

GRILLE INSTALLATION

1. Refer to Figure 8. Compress grille mounting springs and insert into slots in the housing.

2. Press grille firmly into place against ceiling.

MAINTENANCE

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WARNING: Risk of fire or electrical shock; disconnect the power

before cleaning or performing any maintenance on the ventilator.

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If the grille becomes soiled, use only a mild soap and water solution for cleaning. Do not use solvents or abrasive cleaners.

INSTALLATION IN EXISTING CONSTRUCTION

Installing a ventilator in an existing construction site requires

at least a small accessible area (attic or crawl space) above the planned installation location.

Review “INSTALLATION IN A NEW CONSTRUCTION SITE”

and follow all instructions which apply to your installation.

LOCATION: Locate ventilator next to a ceiling joist. WIRING AND DUCTING: Refer to Figure 6 for wiring and

to Figure 2 for ducting. Plan ducting and wiring before proceeding

with installation.

CAUTION: Check the area above the planned installation

to be certain that:

1. Ductwork can be installed.

2. Wiring can be run to the planned location.

3. No wiring or other obstruction will interfere with the installation.

INSTALLATION FROM ACCESSIBLE AREA ABOVE (using headers)

Refer to Figure 9.

1. From below the installation site, 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. Cutout dimensions: 10

⁄16" x 141⁄2".

The short side (10

⁄16") of the cutout must be right next to

the ceiling joist.

4. Mark cutout along marked line.

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

below to avoid chipping plaster.

5. Install headers between joists using nails or screws leaving 10

⁄16" between them.

6. Install brackets upside down on housing's long dimension using hex nuts.

7. Mount damper section to housing, install housing and connect wiring and ductwork. Install power unit/blower assembly and grille.

FIGURE 7

FIGURE 8

FIGURE 9

MOUNTING BRACKET

HOOK HANGER RODS FROM INSIDE TO OUTSIDE

HANGER ROD

POWER UNIT

SLOT

HANGER ROD

MOUNTING SPRING

MOUNTING BRACKET

HEADER

SPRING MOUNTING CLIP

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