QTXEN110HFLT
Humidity Sensing
Fan/Fluorescent Light/
Night Light
READ AND SAVE THESE INSTRUCTIONS
WARNING
TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PER-
SONS, 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 per-
son(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 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.
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. Acceptable for use over a tub or shower when connected to a GFCI (Ground
Fault Circuit Interrupter) - protected branch circuit.
8. This unit must be grounded.
CAUTION
1. For general ventilating use only. Do not use to exhaust hazardous or explosive
materials and vapors.
2. This product is designed for installation in ceilings up to a 12/12 pitch (45
degree angle). Duct connector must point up. DO NOT MOUNT THIS PROD-
UCT 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. Please read specification label on product for further information and
requirements.
TYPICAL INSTALLATIONS
PLAN THE INSTALLATION
INSTALL HOUSING & DUCT
1a. Mount housing to joist or I-joist.
Use a pliers to bend housing TABS out to 90
0
. Hold housing in place so that
the housing tabs contact the bottom of the 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.
TABS
SPACER
(use for mounting to I-Joist)
I-JOIST
*Purchase
separately.
INSULATION*
(Place around and
over Fan Housing.)
ROOF CAP*
(with built-in
damper)
FAN
HOUSING
POWER
CABLE*
6-IN. ROUND
DUCT*
6-IN.
ROUND
ELBOWS*
Seal gaps
around
Housing.
Seal duct
joints with
tape.
OR
Keep duct
runs short.
WALL CAP*
(with built-in
damper)
OR
1b. Mount housing anywhere between trusses, 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”.
HANGER
BAR (4)
SCREWS (4)
MOUNTING
CHANNEL (2)
TAB
Housing mounted to I-joists.
Housing mounted anywhere be-
tween trusses using hanger bars.
Housing mounted anywhere be-
tween I-joists using hanger bars.
Housing mounted to joists.
Housing mounted anywhere
between joists using hanger bars.
Housing mounted anywhere be-
tween trusses using hanger bars.
Cooking
Equipment
Floor
COOKING AREA
Do not install above or
inside this area.
45
o
45
o
NOT FOR USE IN
A COOKING AREA.
Attach the MOUNTING CHANNELS to the housing using the screws
supplied. Make sure TABS face “up” as shown. Use the set of channel
mounting holes (marked “STD”) to mount the housing flush with the
bottom of the drywall. Use the other set of holes (not marked) to mount
the housing flush with the top of the drywall.
99045939A
1. Connect electrical wiring.
Run 120 VAC house wiring to installation location. Use proper UL ap-
proved connector to secure house wiring to wiring plate. Connect wires
as shown in wiring diagrams.
CONNECT WIRING
2. Attach damper/duct
connector.
Snap damper / duct
connector onto hous-
ing. Make sure con-
nector is flush with top
of housing and damper
flap falls closed.
3. Install 6-inch round
ductwork.
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.
INSTALL GRILLE
1. Finish ceiling.
Install ceiling material. Cut out around housing.
2. Plug in wiring.
Plug wiring into the proper receptacles.
3. Attach grille to
housing.
Squeeze grille springs
and insert them into
slots on each side of
housing.
4. Push grille against
ceiling.
Extend hanger bars to the width of the framing.
Hold ventilator in place with the hanger bar tabs wrapping around the bottom
edge of the framing.
Nail ventilator to framing or fasten with screws (not provided) through
holes near nails.
* To ensure a noise-free mount: Secure hanger bars together with screws or
use a pliers to crimp mounting channels tightly around hanger bars.
*
SCREW (2)
HOLE FOR OPTIONAL
SCREW MOUNTING (4)
NAIL (4)
BOTTOM EDGE
OF FRAMING
Register this product at www.broan.com/
register. For Warranty Statement, or to
order Service Parts: go to nutone.com and
type the Model in the “Model Search” field
at the top of the page. Broan, 926 W. State
Street, Hartford, WI 53027 800-637-1453
5. Remove light lens.
Carefully insert a
small flat-blade
screwdriver
between grille and
lens. Pry lens out.
6. Install light bulbs.
Fluorescent bulbs
supplied. Purchase
a 4W incandescent
night-light bulb. In-
sert bulbs into their
sockets. Replace
lens.
OPERATION
The humidity control and fan can be operated separately. Do not use a dimmer
switch to operate the humidity control or light. See “Connect Wiring” for details.
SENSOR OPERATION
This humidity-sensing
fan responds to: (a) rapid to moderate humidity increases and
(b) humidity above a 50%-80% relative humidity (RH) set-point. (a) and (b) are set
with “HUMIDITY” adjustment. Fan may occasionally turn on when environmental
conditions change. If the fan continuously responds to changing environmental
conditions, “HUMIDITY” adjustment may be required (see section below).
STATUS INDICATOR
This indicator can only be seen by looking directly at it. Normal mode is 5-seconds
on and off. If it blinks rapidly for 5-seconds and then off, check sensor connections
on grille and fan housing.
MANUAL ON WITH TIMED OFF
For odor or vapor control, the fan can be energized by cycling its wall-mounted switch
if one is installed. Once the fan has been turned on in this manner, it will remain on
for the set “MINUTES” period. To manually energize the fan:
1. Go to Step 2 if switch is already on; otherwise, turn switch on for more than 1 second.
2. Switch off for less than 1 second.
3. Switch back on and fan will turn on.
HUMIDITY ADJUSTMENT
“HUMIDITY” has been factory set for most shower applications. If the fan is in a tub
area or is used for dampness control, the “HUMIDITY” may need to be decreased
toward 50% RH. If the control is responding too often to changing environmental
conditions, adjustment toward 80% RH may be required. To adjust the “HUMIDITY”:
1. Turn power off at electrical service panel.
2. Through the grille, locate the “HUMIDITY” screwdriver slot.
3. Using a small, flat-blade screwdriver, carefully rotate “HUMIDITY” adjustment
toward 50 or 80.
4. Turn power on and check operation by turning on shower or other humidity
source until fan turns on.
5. Repeat above steps if necessary.
CLEANING & MAINTENANCE
For quiet and efficient operation, long life, and attractive appearance - lower or remove
grille and vacuum interior of unit with a dusting brush attachment.
The motor is permanently lubricated and never needs oiling. If the motor bearings
are making excessive or unusual noises, replace the motor/blower wheel assembly.
SENSOR CLEANING
The humidity sensor is mounted in the grille. 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!
1. Choose the installation location.
The location of your humidity sensing fan is very important. Use the following
guidelines for best operation:
• Locate unit above (GFCI protected circuit required) or within 5 feet of shower
head.
• Locate unit away from heating or cooling sources which can affect humidity levels.
• Do not locate near window. Unit may respond to the outdoor humidity level.
• Unit must be installed in ceiling to properly sense moisture.
• Locate unit only on flat ceilings up to 12 feet high for proper sensing.
• 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.
• Use a roof cap or wall cap that has a built-in damper to reduce backdrafts.
• Plan to supply the unit with proper line voltage and appropriate power cable.
2. Plan the wiring.
• Plan to supply the unit with proper line voltage and appropriate power cable.
Power cable should be routed to the switch box first and then to the unit (See
“CONNECT WIRING” on page 3).
• Do not operate this unit with a speed controlDamage to the sensor unit will result.
• Light or night-light may be installed with a wall-mounted motion control.
MODEL 66V, 66W
3-FUNCTION CONTROL (PURCHASE SEPARATELY)
LIGHT
(ON/OFF)
COM
NIGHT LIGHT
(ON/OFF)
FAN
(AUTO/OFF)
120
VAC
LINE
IN
SWITCH BOX
WHT
GRD
BLK
BLU
RED
WHT
UNIT
ORG
BLK
WHT
GRD
BLK
RED
LIGHT
NIGHT LIGHT
WHT
WHT
BLK
WHT
BRN
HUMIDITY
CONTROL
FAN
MODEL 77DV, 77DW
4-FUNCTION CONTROL (PURCHASE SEPARATELY)
FAN
(ON/OFF/AUTO)
120
VAC
LINE
IN
SWITCH BOX
GRD
RED
RED
BLU
UNIT
RED
BLU
WHT
GRD
WHT
BLK
BLK
RED
WHT
BLK
NIGHT LIGHT
(ON/OFF)
LIGHT
(ON/OFF)
COM
COM
BLK
BLK
WHT
ORG
WHT
BLK
WHT
BRN
HUMIDITY
CONTROL
FAN
WHT
NIGHT LIGHT
LIGHT
WIRING OPTION #1
WIRING OPTION #2 - Fan can be turned ON, OFF, or set to operate automatically.
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