Nutone QTXEN110SFLT - Manual

Page

MODEL QTXEN110SFLT

WARNING

TO REDUCE THE RISK OF FIRE, ELECTRIC

SHOCK, OR INJURY TO PERSONS, OB-

SERVE 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 ser-

vice 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 pre

-

vent backdrafting. Follow the heating equip-

ment manufacturer’s guideline and safety

standards such as those published by the

National Fire Protection Association (NFPA),

and the American Society for Heating, Re-

frigeration 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

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. Please read specification label on product for

further information and requirements.

HUMIDITY SENSING

FAN / FLUORESCENT LIGHT / NIGHT LIGHT

READ AND SAVE THESE INSTRUCTIONS

CLEANING &

MAINTENANCE

Installer: Leave this manual

with the homeowner.

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 motor with the exact service motor. The

impeller should also be replaced.

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!

OPERATION

The humidity control, fan, light, and night

light can be operated separately. Use a 3- or

4-function wall control. Do not use a dimmer

switch to operate the humidity control or

light. See “Connect Wiring” for details.

SENSOR OPERATION

The humidity-sensing

fan uses a sophis-

ticated humidity sensor that responds to:

(a) rapid to moderate (user-adjustable)

increases in humidity or (b) humidity above

a user-adjustable set-point (50%-100%

relative humidity). The humidity sensor

may occasionally turn the fan ON when

environmental conditions change. If the

fan continuously responds to changing

environmental conditions, “SENSITIVITY”

adjustment may be required.

MANUAL ON WITH TIMED OFF

The humidity sensing fan has an additional

operation feature. For odor or vapor con-

trol, 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 user-adjustable “TIMER” period (5

to 60 minutes). This period is factory-set

for 20 minutes.

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.

SENSITIVITY ADJUSTMENT

The “SENSITIVITY” has been factory set

for most shower applications. However,

if the fan is in a tub area or is being used

for dampness control, the “SENSITIVITY”

may need to be increased toward maximum

(“MAX.”). If the control is responding too

often to changing environmental conditions,

movement toward less (“MIN.”) “SENSITIV

-

ITY” may be required.

To adjust the “SENSITIVITY”:

1. Disconnect power at service entrance.

2. Through the grille, locate the screwdriver

slot marked “SENSITIVITY”.

3. Using a small, flat-blade screwdriver,

carefully rotate the “SENSITIVITY”

adjustment toward “MAX.” or “MIN.”

4. Turn on power and check operation by

turning on the shower or other humidity

source until the fan turns on.

5. Repeat above steps if necessary.

TIMER ADJUSTMENT

The humidity sensing fan has a “TIMER”

that can be adjusted from 5 to 60 minutes

(factory-set at 20 minutes). This “TIMER”

controls the length of time that the fan re-

mains ON (a) after the sensor has stopped

sensing a rise in humidity and the humidity

level is below the user-adjustable set-point

or (b) after being energized by cycling the

power switch.

To adjust the “TIMER”:

1. Disconnect power at service entrance.

2. Through the grille, locate the screwdriver

slot marked “TIMER”.

3. Using a small, flat-blade screwdriver,

carefully rotate the “TIMER” adjustment

t o d e s i r e d s e t t i n g ( f r o m 5 t o 6 0

minutes).

4. Check operation by cycling the power

switch as instructed under “MANUAL

ON WITH TIMED OFF” or by turning

on a humidity source until the fan turns

on.

5. Turn humidity source off and time the

unit.

6. Repeat above steps if necessary.

To register this product visit:

www.nutone.com