Broan QTXE110150DCS, QTXE110150DCSL Installation Manual

QT DC Series
Humidity Sensing Fan/Light

READ AND SAVE THESE INSTRUCTIONS

For Warranty Statement, Service Parts, Technical Support, or to
Register your product, please visit our website or call:
In the United States - Broan.com 800-637-1453 or NuTone.com
888-336-6151. In Canada - Broan.ca or NuTone.ca 877-896-1119

WARNING

TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO
PERSONS, OBSERVE THE FOLLOWING:

1. Use this unit only in the manner intended by the manufacturer. If
you have questions, contact the manufacturer at the address or
telephone number listed in the warranty.

2. Before servicing or cleaning unit, switch power off at service panel
and lock the service disconnecting means 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.

3. Installation work and electrical wiring must be done by a qualified
person(s) in accordance with all applicable codes and standards,
including fire-rated construction codes and standards.

4. Sufficient air is needed for proper combustion and exhausting of
gases through the flue (chimney) of fuel burning equipment to
prevent backdrafting. 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.

5. When cutting or drilling into wall or ceiling, do not damage electrical
wiring and other hidden utilities.

6. Ducted fans must always be vented to the outdoors.

7. Use only ON/OFF switch, mechanical timer or relay-switched
control.

8. Acceptable for use over a tub or shower when connected to a GFCI
(Ground Fault Circuit Interrupter) - protected branch circuit.

9. This unit must be grounded.

OPERATION

The humidity sensor, fan and light can be operated separately. Use a
2- or 3-function wall control.

Do not use a speed control to operate the humidity sensor or the fan.

SENSOR OPERATION

This humidity-sensing fan uses a sophisticated humidity sensor that
responds to: (a) rapid to moderate increases in humidity or (b) humidity
above a set-point. The humidity sensor may occasionally turn the fan
ON when environmental conditions change.

MANUAL ON WITH TIMED OFF

This humidity sensing fan has an additional operation feature. For odor
or vapor control, the fan can be energized by cycling the power switch.
Once the fan has been energized in this manner, it will remain on for
the set timer period.

To manually energize the fan:

1. If fan power switch is already ON, proceed to Step 2; otherwise,
turn power switch ON for more than 1 second.

2. Turn fan power switch OFF for less than 1 second.

3. Turn fan power switch back ON and fan will turn ON.

Factory settings shown.

CAUTION

1. For general ventilating use only. Do not use to exhaust hazardous or
explosive materials and vapors.

2. For installation in flat ceilings only. Do not mount this product in a wall.

3. To avoid motor bearing damage and noisy and/or unbalanced impellers,
keep drywall spray, construction dust, etc. off power unit.

4. DO NOT TOUCH THE HUMIDITY-SENSING CIRCUIT BOARD.
Electrostatic discharge may damage the circuit board.

5. Please read specification label on product for further information and
requirements.

CLEANING & MAINTENANCE

For quiet and efficient operation, long life, and attractive appearance

- lower or remove grille and vacuum interior of unit with the dusting

brush attachment.
The motor is permanently lubricated and never needs oiling. If the motor

bearings are making excessive or unusual noises, replace the blower
assembly (includes motor and impeller).

SENSOR CLEANING

The humidity sensor is mounted in the control housing. The sensor will
operate most reliably when cleaned occasionally as follows:

1. Disconnect power at service entrance.

2. Remove the grille. Use a dry dustcloth, clean toothbrush, or lightly
vacuum to clean sensor and grille. DO NOT USE ABRASIVE CLOTH,
STEEL WOOL PADS, OR SCOURING POWDERS.

3. DO NOT USE cleaning sprays, solvents, or water on or near the
sensor!

% HUMIDITY ADJUSTMENT

%HUMIDITY has been factory set at 80% for most shower applications.
If fan is not responding to changing humidity conditions, adjust toward
50%. If fan is responding too often to changing humidity conditions,
adjust toward 80%. If fan is still responding too often at 80%, contact
Broan Technical Support.

To adjust the %HUMIDITY:

1. Turn power off at electrical service panel.

2. Use a small screwdriver to carefully rotate %HUMIDITY control to
desired level.

3. Turn power on.

4. Repeat above steps if necessary.

MINUTES ADJUSTMENT (TIMER)

This humidity-sensing fan has a timer that controls how long the fan
remains on after (a) rise in humidity and (b) humidity level are both
below the user-adjustable %HUMIDITY setting, or after being energized
by cycling power switch.

To adjust the timer:

1. Disconnect power at electrical service panel.

2. Use a small screwdriver to carefully rotate MINUTES control to
increase or decrease time.

3. Turn power on.

4. Repeat above steps if necessary.

1

NOT FOR USE IN

ROOF CAP*

A COOKING AREA.

COOKING AREA

Do not install above or

inside this area.

o

45

Cooking

Equipment

45

INSULATION
(Place around and
over fan housing.)

FAN

HOUSING

POWER
CABLE*

o

Seal gaps

around

Floor

housing.

6-IN. ROUND

DUCT*

*Purchase

separately.

Seal duct

joints with

tape.

6-IN. ROUND

OR

ELBOWS*

(with built-in

damper)

Keep duct

runs short.

WALL CAP*
(with built-in

damper)

IMPORTANT -

The ducting from this fan to the outside of the building
has a strong effect on the air flow, noise and energy use of the fan. Use the
shortest, straightest duct routing possible for best performance, and avoid
installing the fan with smaller ducts than recommended. Insulation around
the ducts can reduce energy loss and inhibit mold growth. Fans installed
with existing ducts may not achieve their rated airflow.

TYPICAL INSTALLATIONS

Housing
mounted to
I-joists.

Use I-joist
spacer block
(provided).

Housing
mounted
anywhere
between
I-joists
using
hanger bars.

Housing
mounted
anywhere
between
joists
using
hanger bars.

Housing
mounted to
truss.

Housing
mounted to
joists.

Housing mounted
anywhere between
trusses using
hanger bars.

2

INSTALLATION STEPS

Some models only:

1

1

Select 110, 130 or 150
CFM based on your
room size and
desired
air ow.

Plug-in and

2

1

secure blower
to housing.

Screws from

parts bag

110 130 150

2

1

Attach the MOUNTING CHANNELS to the housing using the
SCREWS supplied.

Extend HANGER BARS to
the width of the framing.

Hold housing in place
so that bottom edge of
housing will be flush with
finished surface of ceiling.
For 1/2” thick ceiling
material, position bottom
of each mounting flange
flush with bottom of joist.

To ensure a noise-free
mount: Secure hang­ing bars together with
SCREWS and use a pliers to
crimp mounting channels
tightly around hanger bars.

3a

Hold housing in place so
that bottom edge of housing
will be flush with finished
surface of ceiling. For
1/2” thick ceiling material,
position bottom of each
mounting flange flush with
the bottom of joist. The
housing mounts with four (4) screws or nails. Screw or nail
housing to joist through lowest holes in each mounting flange,
then through highest holes. NOTE: Mounting to I-JOIST (shown)
requires use of SPACERS (included) between the highest hole of
each mounting flange and the I-joist.

Mount housing

1

to joist.

SPACER

(use for
mounting
to I-Joist)

I-JOIST

OR

Mount housing anywhere between trusses,

3b

1

joists, or I-joists using hanger bars.

Sliding hanger bars are provided to allow for accurate positioning of hous­ing anywhere between framing. They can be used on all types of framing
(I-joist, standard joist, and truss construction) and span up to 24”.

Attach damper/duct connector.

4

1

INSERT

TAB INTO

SLOT IN

HOUSING

TOP AND BOTTOM FLANGES

REMAIN OUTSIDE OF HOUSING

Install 6-inch round ductwork.

5

1

Connect 6-inch round
ductwork to damper / duct
connector. Run ductwork to
a roof cap or wall cap. Tape
all ductwork connections to
make them secure and air
tight.

3

SCREW FROM PARTS BAG

Connect wiring.

3

4

4

6

1

Fan

Attach cable clamps to Knockout

1

Plate. Knockout Plate mounts to

outside of Housing and may be

oriented as desired.

Light

Connect wires

2

Screw from

Parts Bag

3

Attach grille.

8

1

Plug in
Sensor

1

2

Plug in

3

Light

Connect power cable to wiring
plate (from parts bag) using UL
approved connector. Connect
house wiring to fan wiring. Refer
to wiring diagrams for connection
details. Use screw (from parts
bag) to secure wiring plate to fan
housing. Re-install wiring panel
and secure with screw from parts bag.

Install housing mask.

7

1

Tape mask into housing.
Mask protects unit during
construction. Remove
before attaching grille.

Install ceiling material. Cut
out around housing.

4

4

If grille spring becomes
dislodged from grille - snap it
back into place as shown.

4

WIRING DIAGRAMS

(PURCHASE SEPARATELY)

2 ON/OFF SWITCHES

WIRING OPTION #1

• When first switch (1) is ON, fan will operate automatically,
based on room humidity conditions.

• Turn fan ON immediately for the set timer period (to control
odors), by cycling first switch.

• Use second switch (2) to turn light ON/OFF.

• With optional connection shown, fan will always be ON
when light is ON.

2-FUNCTION CONTROL

(2)

LIGHT

(ON/OFF)

(1)

FAN

(AUTO/OFF)

BLK

120

VAC

GRD

LINE

WHT

IN

BLK

120

VAC

GRD

LINE

WHT

IN

RED

COM

GRD

BLK

ORG

GRD

SWITCH UNIT

LIGHT WITH DIMMER SWITCH

(PURCHASE SEPARATELY)

BLK

(2)

LIGHT
(ON/OFF)
(DIMMER
SWITCH)

COM

(AUTO/OFF)

SWITCH BOX

(1)

FAN

GRD

RED

BLK

GRD

BRN

BLU

HUMIDITY
CONTROL

ORG

BRN

HUMIDITY

CONTROL

LIGHT

BLU

BLK

UNIT

RED

LIGHT

BLK

FAN

WHT

WHT
WHTWHT

RED

FAN

WHT

WHT
WHTWHT

WHT

WHT

WIRING OPTION #2

• When first switch (1) is ON, fan will operate automatically
based on room humidity conditions.

• Turn fan ON immediately (to control odors) by using second
switch (2).

• Use third switch (3) to turn light ON/OFF.

3-FUNTION CONTROL

(PURCHASE SEPARATELY)

(3)

LIGHT

(ON/OFF)

(2)

FAN

(ON/OFF)

(1)

FAN AUTO

(AUTO/OFF)

BLK

WHT

120 VAC
LINE IN

GRD

(2)

FAN

(ON/OFF)

(1)

FAN AUTO

(AUTO/OFF)

BLK

LINE

WHT

IN

GRD

COM

SWITCH

2 ON/OFF SWITCHES

(PURCHASE SEPARATELY)

BLK

RED

WHT

BLK

WHT

GRD

BRN

ORG

BLU

HUMIDITY
CONTROL

LIGHT WITH DIMMER SWITCH

14/2

BLK BLU

(3)

LIGHT

(ON/OFF)
(DIMMER

SWITCH)

WHT

RED

BLK

WHT

GRD

14/3

WHT

UNIT

ORG

BRN

LIGHT

BLK

LIGHT

FAN

BLK

SENSOR

CONTROL

UNITSWITCH BOX

RED

FAN

WHT

WHT

RED

WHT

WHT

WHT

5

1101654A