NuTone QTXEN050 User manual

Page 1
MODELS QTXEN050 • QTXEN080 • QTXEN110
WARNING
TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR IN-
JURY 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 equip-
ment 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 authori-
ties.
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 (ceiling installation only).
8. This unit must be grounded.
CAUTION
1. For general ventilating use only. Do not use to exhaust hazard-
ous 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 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. Please read specification label on product for further informa-
tion and requirements.
QTXEN SERIES
ULTRA SILENT
TM FANS
READ AND SAVE THESE INSTRUCTIONS
CLEANING & MAINTENANCE
Installer: Leave this manual with the homeowner.
For quiet and efficient operation, long life, and attractive appear-
ance - 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).
OPERATION
Use an on/off switch or a solid-state speed control to operate
this fan. See “Connect Wiring” for details. Use of speed controls
other than the NuTone Models 78V and 78W may cause a motor
humming noise.

Page 2
MODELS QTXEN050 • QTXEN080 • QTXEN110
TYPICAL INSTALLATIONS
Housing mounted
to I-joists.
Housing mounted
anywhere be-
tween trusses us-
ing hanger bars.
PLAN THE INSTALLATION
*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)
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.
Housing mounted
anywhere be-
tween
I-joists
using
hanger bars.
Housing mounted
to joists.
Housing mounted
anywhere be-
tween
joists
using
hanger bars.
Housing mounted
anywhere be-
tween trusses us-
ing hanger bars.
Cooking
Equipment
Floor
COOKING AREA
Do not install above or
inside this area.
45o45o
NOT FOR USE IN
A COOKING AREA.

Page 3
MODELS QTXEN050 • QTXEN080 • QTXEN110
2. Attach
damper/duct
connector.
Snap damper /
duct connector
onto housing.
Make sure con-
nector is flush with
top of housing and
damper flap falls
closed.
3. Install
6-inch
round duct-
work.
Connect 6-inch
round ductwork
to damper / duct
connector. Run
ductwork to a
roof cap or wall
cap. Tape all
ductwork con-
nections to make
them secure and air tight.
INSTALL HOUSING & DUCT
1a.Mount
housing to
joist or I-joist.
Use a pliers to bend
housing TABS out
to 900. 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.
SPACER
(use for mounting to I-Joist)
I-JOIST
TABS
1b.Mount housing anywhere between
trusses, joists, or I-joists using hanger
bars.
Sliding hanger bars are provided to allow for accurate posi-
tioning 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 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.
OR
HANGER
BAR (4)
SCREWS (4)
TAB
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.
HOLE FOR OPTIONAL
SCREW MOUNTING (4)
STD
MOUNTING
CHANNEL (2)
NAIL (4)
BOTTOM EDGE
OF FRAMING
*SCREW (2)

Page 4
MODELS QTXEN050 • QTXEN080 • QTXEN110
SERVICE PARTS
99045487A
Key No. Part No. Description
1 97016466 Housing
2 97016450 Duct Connector-6”
3 98010102 Wiring Plate
4 99170245 Screw, #8-18 X .375
5 97018010 Wire Panel/Harness Assembly
6 97017782 Blower Assembly (QTXEN050)
97020047 Blower Assembly (QTXEN080)
97020048 Blower Assembly (QTXEN110)
7 99140199 Grille Spring (2 req’d)
8 97017622 Grille Assembly (includes key no. 7)
9 97018014 Spacer (2 supplied)
10 QTNHB1 Hanger Bar Kit
11 99420665 Thumbscrew, #8-18 x .375
Order service parts by “Part No.” - not by “Key No.”
SERVICE NOTE To remove Blower Assembly: Unplug motor.
Remove thumbscrew (11) from motor plate flange. Find the
single TAB on the motor plate (located next to the recepta-
cle). Push up near motor plate tab while pushing out on side
of housing. Or insert a straight-blade screwdriver into slot in
housing (next to tab) and twist screwdriver.
INSTALL GRILLE
6. Attach grille
to housing.
Squeeze grille
springs and insert
them into slots on
each side of hous-
ing.
7. Push grille
against
ceiling.
5. Finish ceiling.
Install ceiling material. Cut out around housing.
4. Connect electrical wiring.
Run 120 VAC house wiring to installation location. Use
proper UL approved connector to secure house wiring to
wiring plate. Connect wires as shown in wiring diagrams.
CONNECT WIRING
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