Install Instructions

1
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. Acceptable for use over a tub or shower when connected to a GFCI
(Ground Fault Circuit Interrupter) - protected branch circuit (ceiling
installation only).
8. It is recommended to wear safety glasses and gloves during
installation.
9. This unit must be grounded.
10. Monitor your fan for unusual sounds, smells and smoke. If any
appear, turn off the fan immediately and replace it.
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!
READ AND SAVE THESE INSTRUCTIONS
OPERATION
The humidity sensor, fan and light can be operated separately. Use a
2- or 3-function wall control.
Flex
TM
Series Humidity Sensing Fan/Light ONLY: 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.
% 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.
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
Factory settings shown.
50
60
80
70
10
5
60
15
40
20 30
50
%HUMIDITY MINUTES
Roomside / Flex
TM
Series
Humidity Sensing Fan/Light